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USING IRONXL

如何使用 IronXL 在 C# 中產生 Excel 文件

Curtis Chau
Curtis Chau
已更新:

以前在C#或Visual Basic中程式化生成Excel工作表文件時，通常需要安裝Microsoft Office或複雜的COM互操作功能。IronXL完全改變了這一切，提供了一個簡單的API，能夠在不依賴Office的情況下建立Excel應用文件。 本教程引導您使用IronXL在C#中生成Excel文件，從基本的試算表建立到高級格式化和資料庫整合。 無論您是在建立報告、導出資料（XLS或XLSX文件）還是自動生成試算表，您都會學到關於在.NET應用程式中使用Excel的基本技術。

如何使用IronXL在C#中生成Excel文件：圖片1 - IronXL

為什麼不安裝Microsoft Office生成Excel工作表文件？

開發無Office依賴的Excel生成功能可以解決重要的部署挑戰。 由於授權成本和資源開銷，伺服器環境很少安裝Microsoft Office。 每次Office安裝需要大量磁碟空間和記憶體，這使得它對於雲部署或容器化應用程式來說是不切實際的。

IronXL通過獨立運行來消除這些限制。 您的C# Excel文件生成可以在Windows、Linux、macOS、Docker容器或Azure App Services上運行，無需修改。 這種跨平台的相容性意味著您只需要撰寫一次程式，即可部署到任何地方，無論是目標設置為.NET Framework、.NET Core還是.NET 8/9應用程式。

如何使用IronXL在C#中生成Excel文件：圖片2 - 跨平台

性能在沒有COM互操作開銷的情況下顯著提高。 傳統的Office自動化對每項操作都進行單獨的過程實例的建立，消耗了記憶體和CPU資源。 IronXL在您的應用程式的進程空間中實現所有記憶體內的處理，在程式化生成Excel文件時可以提高執行速度和降低資源消耗。

部署變得簡單，因為IronXL作為一個單一的NuGet包發布。 不需要任何註冊表項、任何COM註冊，也不需要維護任何Office服務包。 您的持續整合管道會順利運行，Docker容器也保持輕量化。 這種簡化的方法使得IronXL成為受歡迎的選擇，如在各種開發者論壇中專業人士分享他們的Excel自動化經驗。

一些開發者仍然會探討使用Microsoft的Open XML Productivity Tool來直接處理Office Open XML文件結構。 然而，這種方法需要更多的手動操作，並需要對XML模式和Open XML SDK的安裝有詳細的了解。 IronXL消除了這些複雜性，讓您有一個更快速的方法程式化地使用Excel。

如何使用IronXL在C#中生成Excel文件：圖片3 - 特點

如何在您的C#專案中安裝IronXL？

通過在解決方案管理器中的NuGet套件管理器，安裝IronXL只需片刻。 在Visual Studio中，右鍵點擊您的專案並選擇"管理NuGet套件"。搜索"IronXL.Excel"並點擊安裝。 該包會自動包含生成C# Excel文件所需的所有依賴項。

或者，您可以使用套件管理器主控台：

Install-Package IronXL.Excel

如何使用IronXL在C#中生成Excel文件：圖片4 - 安裝

.NET CLI使用者在處理現代C#專案時：

dotnet add package IronXL.Excel

通過這個簡單的測試驗證安裝，以程式化方式建立一個Excel文件：

using IronXL;
// Create a new Excel workbook
var workbook = WorkBook.Create();
Console.WriteLine("IronXL installed successfully!");
using IronXL;
// Create a new Excel workbook
var workbook = WorkBook.Create();
Console.WriteLine("IronXL installed successfully!");
Imports IronXL

' Create a new Excel workbook
Dim workbook = WorkBook.Create()
Console.WriteLine("IronXL installed successfully!")
$vbLabelText   $csharpLabel

這段程式碼會建立一個記憶體內的工作簿物件。 如果它運行時沒有錯誤，IronXL就可以使用了。 該庫支持所有現代的.NET版本，確保與您現有專案的相容性。 如需詳細的安裝指引和疑難解答，請查閱官方文件。 準備好開始了嗎？ 立即下載IronXL，幾分鐘內即可開始生成Excel文件。

輸出

如何使用IronXL在C#中生成Excel文件：圖片5 - 控制台輸出

如何建立您的第一個Excel文件？

使用IronXL建立Excel文件的起點是WorkBook類，這是您的所有Excel操作的入口。 該庫支持現代的XLSX和舊版的XLS格式，當您在C#中生成Excel文件時，為不同需求提供靈活性。

using IronXL;
// Create a new workbook (XLSX format by default)
WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);
// Add metadata
workbook.Metadata.Title = "Monthly Sales Report";
workbook.Metadata.Author = "Sales Department";
workbook.Metadata.Comments = "Generated using IronXL";
// Create a worksheet
WorkSheet worksheet = workbook.CreateWorkSheet("January Sales");
// Add some basic data
worksheet["A1"].Value = "Date";
worksheet["B1"].Value = "Product";
worksheet["C1"].Value = "Quantity";
worksheet["D1"].Value = "Revenue";
// Add data rows
worksheet["A2"].Value = new DateTime(2024, 1, 15);
worksheet["B2"].Value = "Widget Pro";
worksheet["C2"].Value = 100;
worksheet["D2"].Value = 2500.00;
// Save the workbook
workbook.SaveAs("FirstExcelFile.xlsx");
using IronXL;
// Create a new workbook (XLSX format by default)
WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);
// Add metadata
workbook.Metadata.Title = "Monthly Sales Report";
workbook.Metadata.Author = "Sales Department";
workbook.Metadata.Comments = "Generated using IronXL";
// Create a worksheet
WorkSheet worksheet = workbook.CreateWorkSheet("January Sales");
// Add some basic data
worksheet["A1"].Value = "Date";
worksheet["B1"].Value = "Product";
worksheet["C1"].Value = "Quantity";
worksheet["D1"].Value = "Revenue";
// Add data rows
worksheet["A2"].Value = new DateTime(2024, 1, 15);
worksheet["B2"].Value = "Widget Pro";
worksheet["C2"].Value = 100;
worksheet["D2"].Value = 2500.00;
// Save the workbook
workbook.SaveAs("FirstExcelFile.xlsx");
Imports IronXL

' Create a new workbook (XLSX format by default)
Dim workbook As WorkBook = WorkBook.Create(ExcelFileFormat.XLSX)

' Add metadata
workbook.Metadata.Title = "Monthly Sales Report"
workbook.Metadata.Author = "Sales Department"
workbook.Metadata.Comments = "Generated using IronXL"

' Create a worksheet
Dim worksheet As WorkSheet = workbook.CreateWorkSheet("January Sales")

' Add some basic data
worksheet("A1").Value = "Date"
worksheet("B1").Value = "Product"
worksheet("C1").Value = "Quantity"
worksheet("D1").Value = "Revenue"

' Add data rows
worksheet("A2").Value = New DateTime(2024, 1, 15)
worksheet("B2").Value = "Widget Pro"
worksheet("C2").Value = 100
worksheet("D2").Value = 2500.0

' Save the workbook
workbook.SaveAs("FirstExcelFile.xlsx")
$vbLabelText   $csharpLabel

此程式碼演示了幾個建立Excel文件的關鍵概念。 WorkBook.Create() 方法在記憶體中初始化一個新的Excel文件。 您可以使用ExcelFileFormat 枚舉指定格式——選擇XLSX以實現現代Excel相容性或選擇XLS以支持舊版。 Metadata 屬性允許您嵌入出現在Excel文件屬性中的文件資訊，遵循Microsoft的文件屬性標準。

CreateWorkSheet() 方法新增具有指定名稱的新工作表。 Excel熟悉的單元格符號（例如A1、B1等）使得設置值變得直觀。IronXL自動處理資料型別轉換，能識別日期、數字和文字而無需顯式型別轉換。 SaveAs() 方法將完整的Excel文件寫入磁碟。 如需更多工作表操作，請探索工作表管理教程。

輸出

如何使用IronXL在C#中生成Excel文件：圖片6 - 基本Excel輸出

如何向Excel單元格寫入資料？

IronXL提供多種方法來填充Excel單元格，從個別單元格指定到大範圍操作。 了解這些方法有助於您為您的資料情景選擇最有效的方法。

WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);
// Create a worksheet
WorkSheet worksheet = workbook.CreateWorkSheet("Employees");
// Individual cell assignment
worksheet["A1"].Value = "Employee Name";
worksheet["A2"].Value = "John Smith";
worksheet["A3"].Value = "Jane Doe";
// Range assignment for multiple cells
worksheet["B1:B3"].Value = "Active";
// Using numeric indices (0-based)
worksheet.SetCellValue(0, 2, "Department"); // C1
worksheet.SetCellValue(1, 2, "Sales");       // C2
worksheet.SetCellValue(2, 2, "Marketing");   // C3
// Array-based population
string[] headers = { "ID", "Name", "Email", "Phone" };
for (int i = 0; i < headers.Length; i++)
{
    worksheet.SetCellValue(0, i, headers[i]);
}
// Working with different data types
worksheet["E1"].Value = "Salary";
worksheet["E2"].Value = 75000.50m;  // Decimal for currency
worksheet["E3"].Value = 82000.75m;
worksheet["F1"].Value = "Start Date";
worksheet["F2"].Value = new DateTime(2020, 3, 15);
worksheet["F3"].Value = new DateTime(2019, 7, 1);
worksheet["G1"].Value = "Full Time";
worksheet["G2"].Value = true;  // Boolean
worksheet["G3"].Value = true;
workbook.SaveAs("FirstExcelFile.xlsx");
WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);
// Create a worksheet
WorkSheet worksheet = workbook.CreateWorkSheet("Employees");
// Individual cell assignment
worksheet["A1"].Value = "Employee Name";
worksheet["A2"].Value = "John Smith";
worksheet["A3"].Value = "Jane Doe";
// Range assignment for multiple cells
worksheet["B1:B3"].Value = "Active";
// Using numeric indices (0-based)
worksheet.SetCellValue(0, 2, "Department"); // C1
worksheet.SetCellValue(1, 2, "Sales");       // C2
worksheet.SetCellValue(2, 2, "Marketing");   // C3
// Array-based population
string[] headers = { "ID", "Name", "Email", "Phone" };
for (int i = 0; i < headers.Length; i++)
{
    worksheet.SetCellValue(0, i, headers[i]);
}
// Working with different data types
worksheet["E1"].Value = "Salary";
worksheet["E2"].Value = 75000.50m;  // Decimal for currency
worksheet["E3"].Value = 82000.75m;
worksheet["F1"].Value = "Start Date";
worksheet["F2"].Value = new DateTime(2020, 3, 15);
worksheet["F3"].Value = new DateTime(2019, 7, 1);
worksheet["G1"].Value = "Full Time";
worksheet["G2"].Value = true;  // Boolean
worksheet["G3"].Value = true;
workbook.SaveAs("FirstExcelFile.xlsx");
Dim workbook As WorkBook = WorkBook.Create(ExcelFileFormat.XLSX)
' Create a worksheet
Dim worksheet As WorkSheet = workbook.CreateWorkSheet("Employees")
' Individual cell assignment
worksheet("A1").Value = "Employee Name"
worksheet("A2").Value = "John Smith"
worksheet("A3").Value = "Jane Doe"
' Range assignment for multiple cells
worksheet("B1:B3").Value = "Active"
' Using numeric indices (0-based)
worksheet.SetCellValue(0, 2, "Department") ' C1
worksheet.SetCellValue(1, 2, "Sales") ' C2
worksheet.SetCellValue(2, 2, "Marketing") ' C3
' Array-based population
Dim headers As String() = {"ID", "Name", "Email", "Phone"}
For i As Integer = 0 To headers.Length - 1
    worksheet.SetCellValue(0, i, headers(i))
Next
' Working with different data types
worksheet("E1").Value = "Salary"
worksheet("E2").Value = 75000.5D ' Decimal for currency
worksheet("E3").Value = 82000.75D
worksheet("F1").Value = "Start Date"
worksheet("F2").Value = New DateTime(2020, 3, 15)
worksheet("F3").Value = New DateTime(2019, 7, 1)
worksheet("G1").Value = "Full Time"
worksheet("G2").Value = True ' Boolean
worksheet("G3").Value = True
workbook.SaveAs("FirstExcelFile.xlsx")
$vbLabelText   $csharpLabel

程式碼展示了IronXL靈活的單元格位址。 字串符號（"A1"）對Excel使用者來說非常自然，而數字索引為迴圈和動態生成提供了程式控制。 範圍賦值（"B1:B3"）可以高效地將多個單元格設置為相同的值，這對於初始化列或應用預設值非常理想。

IronXL能夠智能地處理不同的資料型別。小數可以保持財務資料的精度，DateTime物件在Excel中正確格式化為日期，而布林值顯示為TRUE/FALSE。 這種自動轉換消除了手動格式程式碼，同時確保資料完整性。

輸出

如何使用IronXL在C#中生成Excel文件：圖片7 - Excel輸出

對於更大的資料集，考慮使用此模式：

// Populate from a data source
var employees = GetEmployeeData(); // Your data source
for (int row = 0; row < employees.Count; row++)
{
    worksheet[$"A{row + 2}"].Value = employees[row].Id;
    worksheet[$"B{row + 2}"].Value = employees[row].Name;
    worksheet[$"C{row + 2}"].Value = employees[row].Department;
    worksheet[$"D{row + 2}"].Value = employees[row].Salary;
}
// Populate from a data source
var employees = GetEmployeeData(); // Your data source
for (int row = 0; row < employees.Count; row++)
{
    worksheet[$"A{row + 2}"].Value = employees[row].Id;
    worksheet[$"B{row + 2}"].Value = employees[row].Name;
    worksheet[$"C{row + 2}"].Value = employees[row].Department;
    worksheet[$"D{row + 2}"].Value = employees[row].Salary;
}
' Populate from a data source
Dim employees = GetEmployeeData() ' Your data source
For row As Integer = 0 To employees.Count - 1
    worksheet($"A{row + 2}").Value = employees(row).Id
    worksheet($"B{row + 2}").Value = employees(row).Name
    worksheet($"C{row + 2}").Value = employees(row).Department
    worksheet($"D{row + 2}").Value = employees(row).Salary
Next
$vbLabelText   $csharpLabel

此方法遍歷您的資料集合，將每個屬性映射到其相應的列。 字串插值（$"A{row + 2}"）動態生成單元格地址，從第2行開始以保留標題。

如何應用專業格式？

專業的Excel文件需要的不僅僅是原始資料。 IronXL的樣式API通過格式化、顏色和視覺層次結構將普通試算表轉化為精美的商業文件，當您在C#中生成Excel文件時。

using IronXL;
WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);
// Create a worksheet
WorkSheet worksheet = workbook.CreateWorkSheet("Employees");
// Header formatting
var headerRange = worksheet["A1:D1"];
headerRange.Style.Font.Bold = true;
headerRange.Style.Font.Height = 12;
headerRange.Style.SetBackgroundColor("#4472C4");
headerRange.Style.Font.Color = "#FFFFFF";
// Column width adjustment
worksheet.AutoSizeColumn(0); // Auto-fit column A
worksheet.GetColumn(1).Width = 20; // Set column B to 20 characters
// Number formatting
var salaryColumn = worksheet["E2:E3"];
salaryColumn.FormatString = "$#,##0.00";
// Date formatting
var dateColumn = worksheet["F2:F3"];
dateColumn.FormatString = "MM/dd/yyyy";
// Cell borders
var dataRange = worksheet["A1:G3"];
dataRange.Style.TopBorder.Type = IronXL.Styles.BorderType.Thin;
dataRange.Style.BottomBorder.Type = IronXL.Styles.BorderType.Thin;
dataRange.Style.LeftBorder.Type = IronXL.Styles.BorderType.Thin;
dataRange.Style.RightBorder.Type = IronXL.Styles.BorderType.Thin;
// To set border color, use:
dataRange.Style.TopBorder.Color = "#000000";
dataRange.Style.BottomBorder.Color = "#000000";
dataRange.Style.LeftBorder.Color = "#000000";
dataRange.Style.RightBorder.Color = "#000000";
// Text alignment
worksheet["A1:G1"].Style.HorizontalAlignment = IronXL.Styles.HorizontalAlignment.Center;
// Alternating row colors for readability
for (int row = 2; row <= 3; row++)
{
    if (row % 2 == 0)
    {
        worksheet[$"A{row}:G{row}"].Style.SetBackgroundColor("#F2F2F2");
    }
}
using IronXL;
WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);
// Create a worksheet
WorkSheet worksheet = workbook.CreateWorkSheet("Employees");
// Header formatting
var headerRange = worksheet["A1:D1"];
headerRange.Style.Font.Bold = true;
headerRange.Style.Font.Height = 12;
headerRange.Style.SetBackgroundColor("#4472C4");
headerRange.Style.Font.Color = "#FFFFFF";
// Column width adjustment
worksheet.AutoSizeColumn(0); // Auto-fit column A
worksheet.GetColumn(1).Width = 20; // Set column B to 20 characters
// Number formatting
var salaryColumn = worksheet["E2:E3"];
salaryColumn.FormatString = "$#,##0.00";
// Date formatting
var dateColumn = worksheet["F2:F3"];
dateColumn.FormatString = "MM/dd/yyyy";
// Cell borders
var dataRange = worksheet["A1:G3"];
dataRange.Style.TopBorder.Type = IronXL.Styles.BorderType.Thin;
dataRange.Style.BottomBorder.Type = IronXL.Styles.BorderType.Thin;
dataRange.Style.LeftBorder.Type = IronXL.Styles.BorderType.Thin;
dataRange.Style.RightBorder.Type = IronXL.Styles.BorderType.Thin;
// To set border color, use:
dataRange.Style.TopBorder.Color = "#000000";
dataRange.Style.BottomBorder.Color = "#000000";
dataRange.Style.LeftBorder.Color = "#000000";
dataRange.Style.RightBorder.Color = "#000000";
// Text alignment
worksheet["A1:G1"].Style.HorizontalAlignment = IronXL.Styles.HorizontalAlignment.Center;
// Alternating row colors for readability
for (int row = 2; row <= 3; row++)
{
    if (row % 2 == 0)
    {
        worksheet[$"A{row}:G{row}"].Style.SetBackgroundColor("#F2F2F2");
    }
}
Imports IronXL

Dim workbook As WorkBook = WorkBook.Create(ExcelFileFormat.XLSX)
' Create a worksheet
Dim worksheet As WorkSheet = workbook.CreateWorkSheet("Employees")
' Header formatting
Dim headerRange = worksheet("A1:D1")
headerRange.Style.Font.Bold = True
headerRange.Style.Font.Height = 12
headerRange.Style.SetBackgroundColor("#4472C4")
headerRange.Style.Font.Color = "#FFFFFF"
' Column width adjustment
worksheet.AutoSizeColumn(0) ' Auto-fit column A
worksheet.GetColumn(1).Width = 20 ' Set column B to 20 characters
' Number formatting
Dim salaryColumn = worksheet("E2:E3")
salaryColumn.FormatString = "$#,##0.00"
' Date formatting
Dim dateColumn = worksheet("F2:F3")
dateColumn.FormatString = "MM/dd/yyyy"
' Cell borders
Dim dataRange = worksheet("A1:G3")
dataRange.Style.TopBorder.Type = IronXL.Styles.BorderType.Thin
dataRange.Style.BottomBorder.Type = IronXL.Styles.BorderType.Thin
dataRange.Style.LeftBorder.Type = IronXL.Styles.BorderType.Thin
dataRange.Style.RightBorder.Type = IronXL.Styles.BorderType.Thin
' To set border color, use:
dataRange.Style.TopBorder.Color = "#000000"
dataRange.Style.BottomBorder.Color = "#000000"
dataRange.Style.LeftBorder.Color = "#000000"
dataRange.Style.RightBorder.Color = "#000000"
' Text alignment
worksheet("A1:G1").Style.HorizontalAlignment = IronXL.Styles.HorizontalAlignment.Center
' Alternating row colors for readability
For row As Integer = 2 To 3
    If row Mod 2 = 0 Then
        worksheet($"A{row}:G{row}").Style.SetBackgroundColor("#F2F2F2")
    End If
Next row
$vbLabelText   $csharpLabel

此格式化程式碼創造出與企業標準相符的專業外觀。 帶有背景顏色的粗體標題建立了可視化層次結構。 SetBackgroundColor() 方法接受十六進制顏色程式碼，提供對顏色方案的精確控制。 字體屬性包括大小、顏色、粗體、斜體和下劃線選項，這些都是建立與企業品牌指南一致的Excel文件所必需的。

列寬調整可防止文字截斷。 AutoSizeColumn() 自動適應內容，而SetColumnWidth() 提供精確的控制。 數字格式使用Excel的格式程式碼。 例如，"$#,##0.00"顯示帶有千位分隔符和兩位小數的貨幣。 日期格式遵循相似的模式，使用標準Excel日期格式字串，如Microsoft的Excel規範中所記錄。

邊框定義資料邊界，提高可讀性。 BorderType枚舉提供多種樣式：細、中、粗、點狀和虛線。 對齊選項居中標題並右對齊數字，遵循電子表格慣例。 交替行顏色，通常稱為"帶狀行"，有助於讀者跨寬廣的資料集跟踪資訊。 了解更多關於進階格式的知識，以便在我們的單元樣式指南中建立格式化的Excel資料。

輸出

如何使用IronXL在C#中生成Excel文件：圖片8 - 格式化的Excel輸出

如何程式化使用Excel公式？

Excel公式通過自動計算為試算表驅動活力。 IronXL支持公式建立和評估，允許動態試算表自動更新。

var workbook = WorkBook.Create();
// Create a budget worksheet
WorkSheet budget = workbook.CreateWorkSheet("Q1 Budget");
// Headers
budget["A1"].Value = "Category";
budget["B1"].Value = "January";
budget["C1"].Value = "February";
budget["D1"].Value = "March";
budget["E1"].Value = "Q1 Total";
// Budget categories and values
string[] categories = { "Salaries", "Marketing", "Operations", "Equipment", "Training" };
decimal[,] monthlyBudgets = {
    { 50000, 52000, 51000 },
    { 15000, 18000, 20000 },
    { 8000, 8500, 9000 },
    { 12000, 5000, 7000 },
    { 3000, 3500, 4000 }
};
// Populate data
for (int i = 0; i < categories.Length; i++)
{
    budget[$"A{i + 2}"].Value = categories[i];
    budget[$"B{i + 2}"].Value = monthlyBudgets[i, 0];
    budget[$"C{i + 2}"].Value = monthlyBudgets[i, 1];
    budget[$"D{i + 2}"].Value = monthlyBudgets[i, 2];
    // Row total formula
    budget[$"E{i + 2}"].Formula = $"=SUM(B{i + 2}:D{i + 2})";
}
// Monthly totals row
budget["A7"].Value = "Monthly Total";
budget["B7"].Formula = "=SUM(B2:B6)";
budget["C7"].Formula = "=SUM(C2:C6)";
budget["D7"].Formula = "=SUM(D2:D6)";
budget["E7"].Formula = "=SUM(E2:E6)";
// Calculate percentages
budget["A9"].Value = "Marketing %";
budget["B9"].Formula = "=B3/B7*100";
budget["C9"].Formula = "=C3/C7*100";
budget["D9"].Formula = "=D3/D7*100";
// Average calculation
budget["A10"].Value = "Average Spending";
budget["B10"].Formula = "=AVERAGE(B2:B6)";
// Evaluate all formulas
workbook.EvaluateAll();
workbook.SaveAs("Budget.xlsx");
var workbook = WorkBook.Create();
// Create a budget worksheet
WorkSheet budget = workbook.CreateWorkSheet("Q1 Budget");
// Headers
budget["A1"].Value = "Category";
budget["B1"].Value = "January";
budget["C1"].Value = "February";
budget["D1"].Value = "March";
budget["E1"].Value = "Q1 Total";
// Budget categories and values
string[] categories = { "Salaries", "Marketing", "Operations", "Equipment", "Training" };
decimal[,] monthlyBudgets = {
    { 50000, 52000, 51000 },
    { 15000, 18000, 20000 },
    { 8000, 8500, 9000 },
    { 12000, 5000, 7000 },
    { 3000, 3500, 4000 }
};
// Populate data
for (int i = 0; i < categories.Length; i++)
{
    budget[$"A{i + 2}"].Value = categories[i];
    budget[$"B{i + 2}"].Value = monthlyBudgets[i, 0];
    budget[$"C{i + 2}"].Value = monthlyBudgets[i, 1];
    budget[$"D{i + 2}"].Value = monthlyBudgets[i, 2];
    // Row total formula
    budget[$"E{i + 2}"].Formula = $"=SUM(B{i + 2}:D{i + 2})";
}
// Monthly totals row
budget["A7"].Value = "Monthly Total";
budget["B7"].Formula = "=SUM(B2:B6)";
budget["C7"].Formula = "=SUM(C2:C6)";
budget["D7"].Formula = "=SUM(D2:D6)";
budget["E7"].Formula = "=SUM(E2:E6)";
// Calculate percentages
budget["A9"].Value = "Marketing %";
budget["B9"].Formula = "=B3/B7*100";
budget["C9"].Formula = "=C3/C7*100";
budget["D9"].Formula = "=D3/D7*100";
// Average calculation
budget["A10"].Value = "Average Spending";
budget["B10"].Formula = "=AVERAGE(B2:B6)";
// Evaluate all formulas
workbook.EvaluateAll();
workbook.SaveAs("Budget.xlsx");
Imports System

Dim workbook = WorkBook.Create()
' Create a budget worksheet
Dim budget As WorkSheet = workbook.CreateWorkSheet("Q1 Budget")
' Headers
budget("A1").Value = "Category"
budget("B1").Value = "January"
budget("C1").Value = "February"
budget("D1").Value = "March"
budget("E1").Value = "Q1 Total"
' Budget categories and values
Dim categories As String() = {"Salaries", "Marketing", "Operations", "Equipment", "Training"}
Dim monthlyBudgets As Decimal(,) = {
    {50000, 52000, 51000},
    {15000, 18000, 20000},
    {8000, 8500, 9000},
    {12000, 5000, 7000},
    {3000, 3500, 4000}
}
' Populate data
For i As Integer = 0 To categories.Length - 1
    budget($"A{i + 2}").Value = categories(i)
    budget($"B{i + 2}").Value = monthlyBudgets(i, 0)
    budget($"C{i + 2}").Value = monthlyBudgets(i, 1)
    budget($"D{i + 2}").Value = monthlyBudgets(i, 2)
    ' Row total formula
    budget($"E{i + 2}").Formula = $"=SUM(B{i + 2}:D{i + 2})"
Next
' Monthly totals row
budget("A7").Value = "Monthly Total"
budget("B7").Formula = "=SUM(B2:B6)"
budget("C7").Formula = "=SUM(C2:C6)"
budget("D7").Formula = "=SUM(D2:D6)"
budget("E7").Formula = "=SUM(E2:E6)"
' Calculate percentages
budget("A9").Value = "Marketing %"
budget("B9").Formula = "=B3/B7*100"
budget("C9").Formula = "=C3/C7*100"
budget("D9").Formula = "=D3/D7*100"
' Average calculation
budget("A10").Value = "Average Spending"
budget("B10").Formula = "=AVERAGE(B2:B6)"
' Evaluate all formulas
workbook.EvaluateAll()
workbook.SaveAs("Budget.xlsx")
$vbLabelText   $csharpLabel

這個預算範例展示了公式應用的實用操作。 Formula屬性接受標準的Excel公式語法，以等號開頭。 IronXL支持一般函式：SUM, AVERAGE, COUNT, MAX, MIN和許多其他。 公式中的單元格引用完全如在Excel中一樣工作，包括相對和絕對引用。

行總計公式（=SUM(B{i + 2}:D{i + 2})）計算每個類別的季度總計。 字串插值動態生成每行的正確單元格引用。 月度總計涵蓋整列，而百分比計算則特定欄位除以總計。

EvaluateAll() 方法處理所有公式，更新整個工作簿中的計算值。 這確保在Excel中打開文件時，公式會顯示計算結果。 如果不進行評估，Excel將顯示公式，直到使用者觸發重新計算。

輸出

如何使用IronXL在C#中生成Excel文件：圖片9 - 使用公式的Excel輸出

如何從資料庫導出資料到Excel？

實際應用程式通常將資料庫資料導出到Excel以進行報告和分析。 IronXL通過內建的DataTable 支援簡化了這一過程，消除了在從C#應用程式生成Excel文件時需要手動字段映射的需求。

using System;
using System.Data;
using System.Data.SqlClient;
// Simulate database retrieval (replace with your actual database code)
DataTable GetSalesData()
{
    DataTable dt = new DataTable("Sales");
    dt.Columns.Add("OrderID", typeof(int));
    dt.Columns.Add("CustomerName", typeof(string));
    dt.Columns.Add("Product", typeof(string));
    dt.Columns.Add("Quantity", typeof(int));
    dt.Columns.Add("UnitPrice", typeof(decimal));
    dt.Columns.Add("OrderDate", typeof(DateTime));
    // Sample data (normally from database)
    dt.Rows.Add(1001, "ABC Corp", "Widget Pro", 50, 25.99m, DateTime.Now.AddDays(-5));
    dt.Rows.Add(1002, "XYZ Ltd", "Widget Basic", 100, 15.99m, DateTime.Now.AddDays(-4));
    dt.Rows.Add(1003, "ABC Corp", "Widget Premium", 25, 45.99m, DateTime.Now.AddDays(-3));
    dt.Rows.Add(1004, "Tech Solutions", "Widget Pro", 75, 25.99m, DateTime.Now.AddDays(-2));
    dt.Rows.Add(1005, "XYZ Ltd", "Widget Premium", 30, 45.99m, DateTime.Now.AddDays(-1));
    return dt;
}
// Export to Excel
WorkBook reportWorkbook = WorkBook.Create();
WorkSheet reportSheet = reportWorkbook.CreateWorkSheet("Sales Report");
// Get data from database
DataTable salesData = GetSalesData();
// Method 1: Manual mapping with formatting
reportSheet["A1"].Value = "Order Report - " + DateTime.Now.ToString("MMMM yyyy");
reportSheet.Merge("A1:F1");
reportSheet["A1"].Style.Font.Bold = true;
reportSheet["A1"].Style.Font.Height = 14;
// Headers
int headerRow = 3;
for (int col = 0; col < salesData.Columns.Count; col++)
{
    reportSheet.SetCellValue(headerRow - 1, col, salesData.Columns[col].ColumnName);
}
// Format headers
var headers = reportSheet[$"A{headerRow}:F{headerRow}"];
headers.Style.Font.Bold = true;
headers.Style.SetBackgroundColor("#D9E1F2");
// Data rows
for (int row = 0; row < salesData.Rows.Count; row++)
{
    for (int col = 0; col < salesData.Columns.Count; col++)
    {
        reportSheet.SetCellValue(row + headerRow, col, salesData.Rows[row][col]);
    }
    // Add total column with formula
    reportSheet[$"G{row + headerRow + 1}"].Formula = $"=D{row + headerRow + 1}*E{row + headerRow + 1}";
}
// Add total header and format
reportSheet["G3"].Value = "Total";
reportSheet["G3"].Style.Font.Bold = true;
reportSheet["G3"].Style.SetBackgroundColor("#D9E1F2");
// Format currency columns
reportSheet[$"E{headerRow + 1}:E{headerRow + salesData.Rows.Count}"].FormatString = "$#,##0.00";
reportSheet[$"G{headerRow + 1}:G{headerRow + salesData.Rows.Count}"].FormatString = "$#,##0.00";
// Format date column
reportSheet[$"F{headerRow + 1}:F{headerRow + salesData.Rows.Count}"].FormatString = "MM/dd/yyyy";
// Add summary section
int summaryRow = headerRow + salesData.Rows.Count + 2;
reportSheet[$"A{summaryRow}"].Value = "Summary";
reportSheet[$"A{summaryRow}"].Style.Font.Bold = true;
reportSheet[$"A{summaryRow + 1}"].Value = "Total Orders:";
reportSheet[$"B{summaryRow + 1}"].Formula = $"=COUNTA(A{headerRow + 1}:A{headerRow + salesData.Rows.Count})";
reportSheet[$"A{summaryRow + 2}"].Value = "Total Revenue:";
reportSheet[$"B{summaryRow + 2}"].Formula = $"=SUM(G{headerRow + 1}:G{headerRow + salesData.Rows.Count})";
reportSheet[$"B{summaryRow + 2}"].FormatString = "$#,##0.00";
// Auto-fit columns
for (int col = 0; col <= 6; col++)
{
    reportSheet.AutoSizeColumn(col);
}
// Evaluate formulas and save
reportWorkbook.EvaluateAll();
reportWorkbook.SaveAs("DatabaseExport.xlsx");
using System;
using System.Data;
using System.Data.SqlClient;
// Simulate database retrieval (replace with your actual database code)
DataTable GetSalesData()
{
    DataTable dt = new DataTable("Sales");
    dt.Columns.Add("OrderID", typeof(int));
    dt.Columns.Add("CustomerName", typeof(string));
    dt.Columns.Add("Product", typeof(string));
    dt.Columns.Add("Quantity", typeof(int));
    dt.Columns.Add("UnitPrice", typeof(decimal));
    dt.Columns.Add("OrderDate", typeof(DateTime));
    // Sample data (normally from database)
    dt.Rows.Add(1001, "ABC Corp", "Widget Pro", 50, 25.99m, DateTime.Now.AddDays(-5));
    dt.Rows.Add(1002, "XYZ Ltd", "Widget Basic", 100, 15.99m, DateTime.Now.AddDays(-4));
    dt.Rows.Add(1003, "ABC Corp", "Widget Premium", 25, 45.99m, DateTime.Now.AddDays(-3));
    dt.Rows.Add(1004, "Tech Solutions", "Widget Pro", 75, 25.99m, DateTime.Now.AddDays(-2));
    dt.Rows.Add(1005, "XYZ Ltd", "Widget Premium", 30, 45.99m, DateTime.Now.AddDays(-1));
    return dt;
}
// Export to Excel
WorkBook reportWorkbook = WorkBook.Create();
WorkSheet reportSheet = reportWorkbook.CreateWorkSheet("Sales Report");
// Get data from database
DataTable salesData = GetSalesData();
// Method 1: Manual mapping with formatting
reportSheet["A1"].Value = "Order Report - " + DateTime.Now.ToString("MMMM yyyy");
reportSheet.Merge("A1:F1");
reportSheet["A1"].Style.Font.Bold = true;
reportSheet["A1"].Style.Font.Height = 14;
// Headers
int headerRow = 3;
for (int col = 0; col < salesData.Columns.Count; col++)
{
    reportSheet.SetCellValue(headerRow - 1, col, salesData.Columns[col].ColumnName);
}
// Format headers
var headers = reportSheet[$"A{headerRow}:F{headerRow}"];
headers.Style.Font.Bold = true;
headers.Style.SetBackgroundColor("#D9E1F2");
// Data rows
for (int row = 0; row < salesData.Rows.Count; row++)
{
    for (int col = 0; col < salesData.Columns.Count; col++)
    {
        reportSheet.SetCellValue(row + headerRow, col, salesData.Rows[row][col]);
    }
    // Add total column with formula
    reportSheet[$"G{row + headerRow + 1}"].Formula = $"=D{row + headerRow + 1}*E{row + headerRow + 1}";
}
// Add total header and format
reportSheet["G3"].Value = "Total";
reportSheet["G3"].Style.Font.Bold = true;
reportSheet["G3"].Style.SetBackgroundColor("#D9E1F2");
// Format currency columns
reportSheet[$"E{headerRow + 1}:E{headerRow + salesData.Rows.Count}"].FormatString = "$#,##0.00";
reportSheet[$"G{headerRow + 1}:G{headerRow + salesData.Rows.Count}"].FormatString = "$#,##0.00";
// Format date column
reportSheet[$"F{headerRow + 1}:F{headerRow + salesData.Rows.Count}"].FormatString = "MM/dd/yyyy";
// Add summary section
int summaryRow = headerRow + salesData.Rows.Count + 2;
reportSheet[$"A{summaryRow}"].Value = "Summary";
reportSheet[$"A{summaryRow}"].Style.Font.Bold = true;
reportSheet[$"A{summaryRow + 1}"].Value = "Total Orders:";
reportSheet[$"B{summaryRow + 1}"].Formula = $"=COUNTA(A{headerRow + 1}:A{headerRow + salesData.Rows.Count})";
reportSheet[$"A{summaryRow + 2}"].Value = "Total Revenue:";
reportSheet[$"B{summaryRow + 2}"].Formula = $"=SUM(G{headerRow + 1}:G{headerRow + salesData.Rows.Count})";
reportSheet[$"B{summaryRow + 2}"].FormatString = "$#,##0.00";
// Auto-fit columns
for (int col = 0; col <= 6; col++)
{
    reportSheet.AutoSizeColumn(col);
}
// Evaluate formulas and save
reportWorkbook.EvaluateAll();
reportWorkbook.SaveAs("DatabaseExport.xlsx");
Imports System
Imports System.Data
Imports System.Data.SqlClient

' Simulate database retrieval (replace with your actual database code)
Function GetSalesData() As DataTable
    Dim dt As New DataTable("Sales")
    dt.Columns.Add("OrderID", GetType(Integer))
    dt.Columns.Add("CustomerName", GetType(String))
    dt.Columns.Add("Product", GetType(String))
    dt.Columns.Add("Quantity", GetType(Integer))
    dt.Columns.Add("UnitPrice", GetType(Decimal))
    dt.Columns.Add("OrderDate", GetType(DateTime))
    ' Sample data (normally from database)
    dt.Rows.Add(1001, "ABC Corp", "Widget Pro", 50, 25.99D, DateTime.Now.AddDays(-5))
    dt.Rows.Add(1002, "XYZ Ltd", "Widget Basic", 100, 15.99D, DateTime.Now.AddDays(-4))
    dt.Rows.Add(1003, "ABC Corp", "Widget Premium", 25, 45.99D, DateTime.Now.AddDays(-3))
    dt.Rows.Add(1004, "Tech Solutions", "Widget Pro", 75, 25.99D, DateTime.Now.AddDays(-2))
    dt.Rows.Add(1005, "XYZ Ltd", "Widget Premium", 30, 45.99D, DateTime.Now.AddDays(-1))
    Return dt
End Function

' Export to Excel
Dim reportWorkbook As WorkBook = WorkBook.Create()
Dim reportSheet As WorkSheet = reportWorkbook.CreateWorkSheet("Sales Report")

' Get data from database
Dim salesData As DataTable = GetSalesData()

' Method 1: Manual mapping with formatting
reportSheet("A1").Value = "Order Report - " & DateTime.Now.ToString("MMMM yyyy")
reportSheet.Merge("A1:F1")
reportSheet("A1").Style.Font.Bold = True
reportSheet("A1").Style.Font.Height = 14

' Headers
Dim headerRow As Integer = 3
For col As Integer = 0 To salesData.Columns.Count - 1
    reportSheet.SetCellValue(headerRow - 1, col, salesData.Columns(col).ColumnName)
Next

' Format headers
Dim headers = reportSheet($"A{headerRow}:F{headerRow}")
headers.Style.Font.Bold = True
headers.Style.SetBackgroundColor("#D9E1F2")

' Data rows
For row As Integer = 0 To salesData.Rows.Count - 1
    For col As Integer = 0 To salesData.Columns.Count - 1
        reportSheet.SetCellValue(row + headerRow, col, salesData.Rows(row)(col))
    Next
    ' Add total column with formula
    reportSheet($"G{row + headerRow + 1}").Formula = $"=D{row + headerRow + 1}*E{row + headerRow + 1}"
Next

' Add total header and format
reportSheet("G3").Value = "Total"
reportSheet("G3").Style.Font.Bold = True
reportSheet("G3").Style.SetBackgroundColor("#D9E1F2")

' Format currency columns
reportSheet($"E{headerRow + 1}:E{headerRow + salesData.Rows.Count}").FormatString = "$#,##0.00"
reportSheet($"G{headerRow + 1}:G{headerRow + salesData.Rows.Count}").FormatString = "$#,##0.00"

' Format date column
reportSheet($"F{headerRow + 1}:F{headerRow + salesData.Rows.Count}").FormatString = "MM/dd/yyyy"

' Add summary section
Dim summaryRow As Integer = headerRow + salesData.Rows.Count + 2
reportSheet($"A{summaryRow}").Value = "Summary"
reportSheet($"A{summaryRow}").Style.Font.Bold = True
reportSheet($"A{summaryRow + 1}").Value = "Total Orders:"
reportSheet($"B{summaryRow + 1}").Formula = $"=COUNTA(A{headerRow + 1}:A{headerRow + salesData.Rows.Count})"
reportSheet($"A{summaryRow + 2}").Value = "Total Revenue:"
reportSheet($"B{summaryRow + 2}").Formula = $"=SUM(G{headerRow + 1}:G{headerRow + salesData.Rows.Count})"
reportSheet($"B{summaryRow + 2}").FormatString = "$#,##0.00"

' Auto-fit columns
For col As Integer = 0 To 6
    reportSheet.AutoSizeColumn(col)
Next

' Evaluate formulas and save
reportWorkbook.EvaluateAll()
reportWorkbook.SaveAs("DatabaseExport.xlsx")
$vbLabelText   $csharpLabel

這個全面的範例展示了一個完整的資料庫到Excel的工作流程，專為在C#中生成Excel文件。 DataTable 模擬資料庫檢索 - 在生產中，用Entity Framework、Dapper或ADO.NET進行實際的資料庫查詢替換。 手動映射方法提供了對格式化和佈局的完全控制，正如Microsoft的資料導出最佳實踐中所建議的那樣。

程式碼建立了一個帶標題、格式化標題行和資料行的專業報告。 公式列動態計算每行的總計。 摘要部分利用Excel公式來計算訂單數和總收入，確保如果資料更改，這些數值將被更新。 貨幣和日期格式遵循商業文件標準，而自動調整欄寬則確保所有內容正確顯示。 如需處理更大的資料集，請查看我們的性能優化指南。

輸出

如何使用IronXL在C#中生成Excel文件：圖片10 - 資料庫導出到Excel輸出

需要簡化您的Excel報告嗎？ 獲取授權以釋放IronXL在生產部署中的全部潛力。

如何處理多個工作表？

複雜的Excel文件經常需要多個工作表來組織相關資料。 IronXL通過直觀的方法簡化了多工作表的管理，方便地建立、存取和組織工作表。

// Create a multi-sheet workbook
WorkBook companyReport = WorkBook.Create();
// Create department sheets
WorkSheet salesSheet = companyReport.CreateWorkSheet("Sales");
WorkSheet inventorySheet = companyReport.CreateWorkSheet("Inventory");
WorkSheet hrSheet = companyReport.CreateWorkSheet("HR Metrics");
// Populate Sales sheet
salesSheet["A1"].Value = "Sales Dashboard";
salesSheet["A3"].Value = "Region";
salesSheet["B3"].Value = "Q1 Sales";
salesSheet["C3"].Value = "Q2 Sales";
string[] regions = { "North", "South", "East", "West" };
decimal[] q1Sales = { 250000, 180000, 220000, 195000 };
decimal[] q2Sales = { 275000, 195000, 240000, 210000 };
for (int i = 0; i < regions.Length; i++)
{
    salesSheet[$"A{i + 4}"].Value = regions[i];
    salesSheet[$"B{i + 4}"].Value = q1Sales[i];
    salesSheet[$"C{i + 4}"].Value = q2Sales[i];
}
// Populate Inventory sheet
inventorySheet["A1"].Value = "Inventory Status";
inventorySheet["A3"].Value = "Product";
inventorySheet["B3"].Value = "Stock Level";
inventorySheet["C3"].Value = "Reorder Point";
inventorySheet["D3"].Value = "Status";
// Add inventory data with conditional status
string[] products = { "Widget A", "Widget B", "Widget C" };
int[] stock = { 150, 45, 200 };
int[] reorderPoint = { 100, 50, 75 };
for (int i = 0; i < products.Length; i++)
{
    inventorySheet[$"A{i + 4}"].Value = products[i];
    inventorySheet[$"B{i + 4}"].Value = stock[i];
    inventorySheet[$"C{i + 4}"].Value = reorderPoint[i];
    // Status based on stock level
    string status = stock[i] <= reorderPoint[i] ? "REORDER" : "OK";
    inventorySheet[$"D{i + 4}"].Value = status;
    // Color code status
    if (status == "REORDER")
    {
        inventorySheet[$"D{i + 4}"].Style.Font.Color = "#FF0000";
    }
}
// Create summary sheet referencing other sheets
WorkSheet summarySheet = companyReport.CreateWorkSheet("Summary");
summarySheet["A1"].Value = "Company Overview";
summarySheet["A3"].Value = "Metric";
summarySheet["B3"].Value = "Value";
summarySheet["A4"].Value = "Total Q1 Sales";
summarySheet["B4"].Formula = "=SUM(Sales!B4:B7)";
summarySheet["A5"].Value = "Total Q2 Sales";
summarySheet["B5"].Formula = "=SUM(Sales!C4:C7)";
summarySheet["A6"].Value = "Products Need Reorder";
summarySheet["B6"].Formula = "=COUNTIF(Inventory!D4:D6,\"REORDER\")";
// Format all sheets consistently
foreach (WorkSheet sheet in companyReport.WorkSheets)
{
    // Format headers
    sheet["A1"].Style.Font.Bold = true;
    sheet["A1"].Style.Font.Height = 14;
    var headerRow = sheet["A3:D3"];
    headerRow.Style.Font.Bold = true;
    headerRow.Style.SetBackgroundColor("#E7E6E6");
}
// Save multi-sheet workbook
companyReport.SaveAs("CompanyReport.xlsx");
// Create a multi-sheet workbook
WorkBook companyReport = WorkBook.Create();
// Create department sheets
WorkSheet salesSheet = companyReport.CreateWorkSheet("Sales");
WorkSheet inventorySheet = companyReport.CreateWorkSheet("Inventory");
WorkSheet hrSheet = companyReport.CreateWorkSheet("HR Metrics");
// Populate Sales sheet
salesSheet["A1"].Value = "Sales Dashboard";
salesSheet["A3"].Value = "Region";
salesSheet["B3"].Value = "Q1 Sales";
salesSheet["C3"].Value = "Q2 Sales";
string[] regions = { "North", "South", "East", "West" };
decimal[] q1Sales = { 250000, 180000, 220000, 195000 };
decimal[] q2Sales = { 275000, 195000, 240000, 210000 };
for (int i = 0; i < regions.Length; i++)
{
    salesSheet[$"A{i + 4}"].Value = regions[i];
    salesSheet[$"B{i + 4}"].Value = q1Sales[i];
    salesSheet[$"C{i + 4}"].Value = q2Sales[i];
}
// Populate Inventory sheet
inventorySheet["A1"].Value = "Inventory Status";
inventorySheet["A3"].Value = "Product";
inventorySheet["B3"].Value = "Stock Level";
inventorySheet["C3"].Value = "Reorder Point";
inventorySheet["D3"].Value = "Status";
// Add inventory data with conditional status
string[] products = { "Widget A", "Widget B", "Widget C" };
int[] stock = { 150, 45, 200 };
int[] reorderPoint = { 100, 50, 75 };
for (int i = 0; i < products.Length; i++)
{
    inventorySheet[$"A{i + 4}"].Value = products[i];
    inventorySheet[$"B{i + 4}"].Value = stock[i];
    inventorySheet[$"C{i + 4}"].Value = reorderPoint[i];
    // Status based on stock level
    string status = stock[i] <= reorderPoint[i] ? "REORDER" : "OK";
    inventorySheet[$"D{i + 4}"].Value = status;
    // Color code status
    if (status == "REORDER")
    {
        inventorySheet[$"D{i + 4}"].Style.Font.Color = "#FF0000";
    }
}
// Create summary sheet referencing other sheets
WorkSheet summarySheet = companyReport.CreateWorkSheet("Summary");
summarySheet["A1"].Value = "Company Overview";
summarySheet["A3"].Value = "Metric";
summarySheet["B3"].Value = "Value";
summarySheet["A4"].Value = "Total Q1 Sales";
summarySheet["B4"].Formula = "=SUM(Sales!B4:B7)";
summarySheet["A5"].Value = "Total Q2 Sales";
summarySheet["B5"].Formula = "=SUM(Sales!C4:C7)";
summarySheet["A6"].Value = "Products Need Reorder";
summarySheet["B6"].Formula = "=COUNTIF(Inventory!D4:D6,\"REORDER\")";
// Format all sheets consistently
foreach (WorkSheet sheet in companyReport.WorkSheets)
{
    // Format headers
    sheet["A1"].Style.Font.Bold = true;
    sheet["A1"].Style.Font.Height = 14;
    var headerRow = sheet["A3:D3"];
    headerRow.Style.Font.Bold = true;
    headerRow.Style.SetBackgroundColor("#E7E6E6");
}
// Save multi-sheet workbook
companyReport.SaveAs("CompanyReport.xlsx");
Imports System

' Create a multi-sheet workbook
Dim companyReport As WorkBook = WorkBook.Create()
' Create department sheets
Dim salesSheet As WorkSheet = companyReport.CreateWorkSheet("Sales")
Dim inventorySheet As WorkSheet = companyReport.CreateWorkSheet("Inventory")
Dim hrSheet As WorkSheet = companyReport.CreateWorkSheet("HR Metrics")
' Populate Sales sheet
salesSheet("A1").Value = "Sales Dashboard"
salesSheet("A3").Value = "Region"
salesSheet("B3").Value = "Q1 Sales"
salesSheet("C3").Value = "Q2 Sales"
Dim regions As String() = {"North", "South", "East", "West"}
Dim q1Sales As Decimal() = {250000D, 180000D, 220000D, 195000D}
Dim q2Sales As Decimal() = {275000D, 195000D, 240000D, 210000D}
For i As Integer = 0 To regions.Length - 1
    salesSheet($"A{i + 4}").Value = regions(i)
    salesSheet($"B{i + 4}").Value = q1Sales(i)
    salesSheet($"C{i + 4}").Value = q2Sales(i)
Next
' Populate Inventory sheet
inventorySheet("A1").Value = "Inventory Status"
inventorySheet("A3").Value = "Product"
inventorySheet("B3").Value = "Stock Level"
inventorySheet("C3").Value = "Reorder Point"
inventorySheet("D3").Value = "Status"
' Add inventory data with conditional status
Dim products As String() = {"Widget A", "Widget B", "Widget C"}
Dim stock As Integer() = {150, 45, 200}
Dim reorderPoint As Integer() = {100, 50, 75}
For i As Integer = 0 To products.Length - 1
    inventorySheet($"A{i + 4}").Value = products(i)
    inventorySheet($"B{i + 4}").Value = stock(i)
    inventorySheet($"C{i + 4}").Value = reorderPoint(i)
    ' Status based on stock level
    Dim status As String = If(stock(i) <= reorderPoint(i), "REORDER", "OK")
    inventorySheet($"D{i + 4}").Value = status
    ' Color code status
    If status = "REORDER" Then
        inventorySheet($"D{i + 4}").Style.Font.Color = "#FF0000"
    End If
Next
' Create summary sheet referencing other sheets
Dim summarySheet As WorkSheet = companyReport.CreateWorkSheet("Summary")
summarySheet("A1").Value = "Company Overview"
summarySheet("A3").Value = "Metric"
summarySheet("B3").Value = "Value"
summarySheet("A4").Value = "Total Q1 Sales"
summarySheet("B4").Formula = "=SUM(Sales!B4:B7)"
summarySheet("A5").Value = "Total Q2 Sales"
summarySheet("B5").Formula = "=SUM(Sales!C4:C7)"
summarySheet("A6").Value = "Products Need Reorder"
summarySheet("B6").Formula = "=COUNTIF(Inventory!D4:D6,""REORDER"")"
' Format all sheets consistently
For Each sheet As WorkSheet In companyReport.WorkSheets
    ' Format headers
    sheet("A1").Style.Font.Bold = True
    sheet("A1").Style.Font.Height = 14
    Dim headerRow = sheet("A3:D3")
    headerRow.Style.Font.Bold = True
    headerRow.Style.SetBackgroundColor("#E7E6E6")
Next
' Save multi-sheet workbook
companyReport.SaveAs("CompanyReport.xlsx")
$vbLabelText   $csharpLabel

這個範例建立了一個完整的多工作表報告。 每個工作表都有其特定的用途：銷售資料、庫存跟蹤及人力資源指標。 摘要表使用跨工作表公式整合關鍵指標。 請注意公式中工作表引用語法"Sales!B4:B7"所指的是銷售工作表上的B4到B7單元格。

庫存表展示條件邏輯，將低庫存項目標記為紅色以便立即關注。 foreach 迴圈在所有工作表中應用一致的格式，保持整個工作簿的專業外觀。 工作表名稱顯示為Excel中的標籤，讓使用者可以輕鬆地在不同的資料視圖之間轉換。

生成Excel的最佳實踐是什麼？

在C#中生成高效的Excel文件需要對記憶體使用、錯誤處理和部署的審慎處理。 這些實踐確保您的應用程式在程式化生成Excel試算表時有效擴展並保持可靠性。

對於大文件來說，記憶體管理變得至關重要。 不要將整個資料集載入記憶體中，而是分塊處理資料：

// Process large datasets efficiently
public void ExportLargeDataset(string filename)
{
    WorkBook workbook = WorkBook.Create();
    WorkSheet sheet = workbook.CreateWorkSheet("Data");
    int rowsPerBatch = 1000;
    int currentRow = 1;
    // Process in batches
    foreach (var batch in GetDataInBatches(rowsPerBatch))
    {
        foreach (var record in batch)
        {
            sheet[$"A{currentRow}"].Value = record.Id;
            sheet[$"B{currentRow}"].Value = record.Name;
            sheet[$"C{currentRow}"].Value = record.Value;
            currentRow++;
        }
    }
    workbook.SaveAs(filename);
}
// Process large datasets efficiently
public void ExportLargeDataset(string filename)
{
    WorkBook workbook = WorkBook.Create();
    WorkSheet sheet = workbook.CreateWorkSheet("Data");
    int rowsPerBatch = 1000;
    int currentRow = 1;
    // Process in batches
    foreach (var batch in GetDataInBatches(rowsPerBatch))
    {
        foreach (var record in batch)
        {
            sheet[$"A{currentRow}"].Value = record.Id;
            sheet[$"B{currentRow}"].Value = record.Name;
            sheet[$"C{currentRow}"].Value = record.Value;
            currentRow++;
        }
    }
    workbook.SaveAs(filename);
}
' Process large datasets efficiently
Public Sub ExportLargeDataset(filename As String)
    Dim workbook As WorkBook = WorkBook.Create()
    Dim sheet As WorkSheet = workbook.CreateWorkSheet("Data")
    Dim rowsPerBatch As Integer = 1000
    Dim currentRow As Integer = 1
    ' Process in batches
    For Each batch In GetDataInBatches(rowsPerBatch)
        For Each record In batch
            sheet($"A{currentRow}").Value = record.Id
            sheet($"B{currentRow}").Value = record.Name
            sheet($"C{currentRow}").Value = record.Value
            currentRow += 1
        Next
    Next
    workbook.SaveAs(filename)
End Sub
$vbLabelText   $csharpLabel

錯誤處理防止應用程式崩潰，並在生成Excel文件時提供有意義的反饋。

try
{
    WorkBook workbook = WorkBook.Create();
    // Excel generation code
    workbook.SaveAs("output.xlsx");
}
catch (Exception ex)
{
    // Log the error
    Console.WriteLine($"Excel generation failed: {ex.Message}");
    // Implement appropriate recovery or notification
}
try
{
    WorkBook workbook = WorkBook.Create();
    // Excel generation code
    workbook.SaveAs("output.xlsx");
}
catch (Exception ex)
{
    // Log the error
    Console.WriteLine($"Excel generation failed: {ex.Message}");
    // Implement appropriate recovery or notification
}
Imports System

Try
    Dim workbook As WorkBook = WorkBook.Create()
    ' Excel generation code
    workbook.SaveAs("output.xlsx")
Catch ex As Exception
    ' Log the error
    Console.WriteLine($"Excel generation failed: {ex.Message}")
    ' Implement appropriate recovery or notification
End Try
$vbLabelText   $csharpLabel

對於Web應用程式，生成Excel文件在記憶體中並流向使用者：

// ASP.NET Core example
public IActionResult DownloadExcel()
{
    WorkBook workbook = GenerateReport();
    var stream = new MemoryStream();
    workbook.SaveAs(stream);
    stream.Position = 0;
    return File(stream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "report.xlsx");
}
// ASP.NET Core example
public IActionResult DownloadExcel()
{
    WorkBook workbook = GenerateReport();
    var stream = new MemoryStream();
    workbook.SaveAs(stream);
    stream.Position = 0;
    return File(stream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "report.xlsx");
}
Imports System.IO
Imports Microsoft.AspNetCore.Mvc

Public Function DownloadExcel() As IActionResult
    Dim workbook As WorkBook = GenerateReport()
    Dim stream As New MemoryStream()
    workbook.SaveAs(stream)
    stream.Position = 0
    Return File(stream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "report.xlsx")
End Function
$vbLabelText   $csharpLabel

部署考慮確保生產操作的順利進行。 IronXL可在無提升權限的受限環境中工作，使其適合於共享託管和容器化部署。 在您的部署包中包含IronXL授權文件，確保您的應用程式擁有快取文件操作的寫入權限（如有需要）。 如需更多關於部署的指引，請查閱部署文件。

結論

IronXL將C#中的Excel文件生成從一個複雜的挑戰轉變為簡單的編碼。 您已經學會生成工作簿、填充單元格、應用格式、使用公式和導出資料庫資料 - 都不需要Microsoft Office依賴。 這些技術穩定地適用於Windows、Linux和雲平台上的程式化生成Excel文件。

準備在您的C#應用程式中實施Excel生成嗎？ 開始您的免費試用或瀏覽全面的API文件以了解進階功能。 針對生產部署，查看與您的專案需求相符合的授權選項。

如何使用IronXL在C#中生成Excel文件：圖片11 - 授權

常見問題

什麼是IronXL？

IronXL是一個功能強大的程式庫，用於在.NET應用程式中建立、讀取和編輯Excel文件，無需Microsoft Office或複雜的COM Interop。

如何使用C#中的IronXL建立Excel文件？

使用IronXL，您可以通過其使用者友好的API程式化地生成C#中的Excel文件。這包括建立電子表格、應用格式以及與資料庫整合。

我需要安裝Microsoft Office才能使用IronXL嗎？

不需要，IronXL不需要Microsoft Office。它允許您在不依賴Office的情況下建立和操作Excel文件。

IronXL能否處理XLS和XLSX文件格式？

是的，IronXL支持XLS和XLSX文件格式，使您能夠無縫處理多種Excel文件。

IronXL適合用於建立報告和導出資料嗎？

當然，IronXL非常適合用於生成報告和將資料導出到Excel文件，因為其功能強大且整合能力無縫。

IronXL提供什麼格式選項？

IronXL提供了高級格式設定選項，包括單元格樣式、條件格式等，讓您能夠建立視覺效果吸引且井井有條的Excel文件。

我可以用IronXL自動生成電子表格嗎？

可以，IronXL支持電子表格生成過程的自動化，讓您能夠更有效地處理大型資料集和重複性任務。

IronXL與Visual Basic和C#相容嗎？

是的，IronXL可以與C#和Visual Basic一起使用，為使用不同編程語言的開發者提供靈活性，以使用.NET進行開發。

IronXL如何與資料庫整合？

IronXL允許您輕鬆地與資料庫整合，使您可以在Excel文件和資料庫系統之間輕鬆地進行資料導入和導出。

我在哪裡可以找到使用IronXL在.NET應用程式中的教程？

您可以在Iron Software網站上找到關於在.NET應用程式中使用IronXL的全面教程，指引您進行從基本到高級的Excel文件建立和操作。

Curtis Chau
Curtis Chau
  立即與工程團隊聊天
技術作家

Curtis Chau擁有Carleton大學的電腦科學學士學位，專精於前端開發，擁有Node.js、TypeScript、JavaScript和React的專業知識。Curtis熱衷於建立直觀且美觀的使用者介面，喜愛使用現代框架並建立結構良好、視覺吸引力的手冊。

除了開發，Curtis對物聯網（IoT）有濃厚的興趣，探索創新的方法來整合硬體和軟體。在空閒時間，他喜歡玩遊戲和建立Discord機器人，結合他對技術的熱愛與創造力。

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