如何使用IronXL在 C# 中打开 Excel 文件

Install-Package IronXL
dotnet add package IronXL

// Load an existing Excel file
WorkBook workbook = WorkBook.Load("sales-data.xlsx");

// Access the first worksheet by index
WorkSheet sheet = workbook.WorkSheets[0];

// Or access a worksheet by name
WorkSheet namedSheet = workbook.GetWorkSheet("January Sales");

// Read a specific cell value
string cellValue = sheet["A1"].StringValue;
Console.WriteLine($"Cell A1 contains: {cellValue}");

// Read a numeric value
decimal revenue = sheet["B2"].DecimalValue;
Console.WriteLine($"Revenue: {revenue:C}");

// Check cell data type before reading
var cell = sheet["C3"];
Console.WriteLine($"Type: {cell.Type}, Value: {cell.Value}");

' Load an existing Excel file
Dim workbook As WorkBook = WorkBook.Load("sales-data.xlsx")

' Access the first worksheet by index
Dim sheet As WorkSheet = workbook.WorkSheets(0)

' Or access a worksheet by name
Dim namedSheet As WorkSheet = workbook.GetWorkSheet("January Sales")

' Read a specific cell value
Dim cellValue As String = sheet("A1").StringValue
Console.WriteLine($"Cell A1 contains: {cellValue}")

' Read a numeric value
Dim revenue As Decimal = sheet("B2").DecimalValue
Console.WriteLine($"Revenue: {revenue:C}")

' Check cell data type before reading
Dim cell = sheet("C3")
Console.WriteLine($"Type: {cell.Type}, Value: {cell.Value}")

// Create a new workbook in XLSX format
WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);

// Add metadata
workbook.Metadata.Author = "Sales Department";
workbook.Metadata.Title = "Q1 Revenue Report";

// Create a named worksheet
WorkSheet sheet = workbook.CreateWorkSheet("Q1 Report");

// Add header row
sheet["A1"].Value = "Product";
sheet["B1"].Value = "Units Sold";
sheet["C1"].Value = "Revenue";

// Add data rows
sheet["A2"].Value = "Software Licenses";
sheet["B2"].Value = 120;
sheet["C2"].Value = 45000;

sheet["A3"].Value = "Support Contracts";
sheet["B3"].Value = 55;
sheet["C3"].Value = 27500;

// Add a SUM formula
sheet["C4"].Formula = "=SUM(C2:C3)";

// Apply number formatting
sheet["C2:C4"].FormatString = "$#,##0.00";

// Save the workbook to disk
workbook.SaveAs("quarterly-report.xlsx");
Console.WriteLine("Workbook saved successfully.");

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

' Add metadata
workbook.Metadata.Author = "Sales Department"
workbook.Metadata.Title = "Q1 Revenue Report"

' Create a named worksheet
Dim sheet As WorkSheet = workbook.CreateWorkSheet("Q1 Report")

' Add header row
sheet("A1").Value = "Product"
sheet("B1").Value = "Units Sold"
sheet("C1").Value = "Revenue"

' Add data rows
sheet("A2").Value = "Software Licenses"
sheet("B2").Value = 120
sheet("C2").Value = 45000

sheet("A3").Value = "Support Contracts"
sheet("B3").Value = 55
sheet("C3").Value = 27500

' Add a SUM formula
sheet("C4").Formula = "=SUM(C2:C3)"

' Apply number formatting
sheet("C2:C4").FormatString = "$#,##0.00"

' Save the workbook to disk
workbook.SaveAs("quarterly-report.xlsx")
Console.WriteLine("Workbook saved successfully.")

// Load a workbook and select the default sheet
WorkBook workbook = WorkBook.Load("inventory.xlsx");
WorkSheet sheet = workbook.DefaultWorkSheet;

// Read a rectangular range of cells
var range = sheet["A1:D10"];
foreach (var cell in range)
{
    Console.WriteLine($"{cell.AddressString}: {cell.Text}");
}

// Convert the worksheet to a DataTable for database integration
System.Data.DataTable dataTable = sheet.ToDataTable(useFirstRowAsColumnHeaders: true);
Console.WriteLine($"Rows: {dataTable.Rows.Count}, Columns: {dataTable.Columns.Count}");

// Use aggregate functions directly on a range
decimal total = sheet["C2:C10"].Sum();
decimal average = sheet["C2:C10"].Avg();
decimal maxValue = sheet["C2:C10"].Max();

Console.WriteLine($"Total: {total:C}");
Console.WriteLine($"Average: {average:C}");
Console.WriteLine($"Max: {maxValue:C}");

// Filter and find rows using LINQ on the DataTable
var highValue = dataTable.AsEnumerable()
    .Where(row => row.Field<decimal>("Revenue") > 10000)
    .ToList();
Console.WriteLine($"High-value rows: {highValue.Count}");

Imports System
Imports System.Data
Imports System.Linq

' Load a workbook and select the default sheet
Dim workbook As WorkBook = WorkBook.Load("inventory.xlsx")
Dim sheet As WorkSheet = workbook.DefaultWorkSheet

' Read a rectangular range of cells
Dim range = sheet("A1:D10")
For Each cell In range
    Console.WriteLine($"{cell.AddressString}: {cell.Text}")
Next

' Convert the worksheet to a DataTable for database integration
Dim dataTable As DataTable = sheet.ToDataTable(useFirstRowAsColumnHeaders:=True)
Console.WriteLine($"Rows: {dataTable.Rows.Count}, Columns: {dataTable.Columns.Count}")

' Use aggregate functions directly on a range
Dim total As Decimal = sheet("C2:C10").Sum()
Dim average As Decimal = sheet("C2:C10").Avg()
Dim maxValue As Decimal = sheet("C2:C10").Max()

Console.WriteLine($"Total: {total:C}")
Console.WriteLine($"Average: {average:C}")
Console.WriteLine($"Max: {maxValue:C}")

' Filter and find rows using LINQ on the DataTable
Dim highValue = dataTable.AsEnumerable() _
    .Where(Function(row) row.Field(Of Decimal)("Revenue") > 10000) _
    .ToList()
Console.WriteLine($"High-value rows: {highValue.Count}")