在 C# 中无需 Microsoft Office 处理 Excel 文件

Key Features of IronXL

The key features of IronXL are as follows:

• Reading and Writing Excel Files: IronXL can create and manipulate Excel files. It supports both classic XLS and modern XLSX file formats, ensuring compatibility with different versions of Excel.
• Exporting Data: IronXL can export data to and from Excel files to other formats efficiently like XML files, CSV, and other formats.
• Support for .NET Core and Framework: IronXL works seamlessly with both .NET Core and .NET Framework, making it a versatile choice for various development environments.
• Ease of Use: With IronXL, developers can perform complex Excel operations with minimal lines of code, enhancing productivity and efficiency.

Creating a New Excel File

Creating a new Excel file is a common task in data manipulation and reporting. With IronXL, you can effortlessly create Excel files with a few lines of code, add worksheets, and populate them with data.

The following code shows how we can create an Excel file using IronXL:

using IronXL;

// Initialize a new Workbook
var workbook = new WorkBook();
// Add a new Worksheet named "Sales Data"
var worksheet = workbook.CreateWorkSheet("Sales Data");

// Populate the Worksheet with data
worksheet["A1"].Value = "Month";
worksheet["B1"].Value = "Sales";
worksheet["A2"].Value = "January";
worksheet["B2"].Value = 5000;
worksheet["A3"].Value = "February";
worksheet["B3"].Value = 6000;

// Save the Workbook as an Excel file
workbook.SaveAs("SalesReport.xlsx");

using IronXL;

// Initialize a new Workbook
var workbook = new WorkBook();
// Add a new Worksheet named "Sales Data"
var worksheet = workbook.CreateWorkSheet("Sales Data");

// Populate the Worksheet with data
worksheet["A1"].Value = "Month";
worksheet["B1"].Value = "Sales";
worksheet["A2"].Value = "January";
worksheet["B2"].Value = 5000;
worksheet["A3"].Value = "February";
worksheet["B3"].Value = 6000;

// Save the Workbook as an Excel file
workbook.SaveAs("SalesReport.xlsx");

Imports IronXL

' Initialize a new Workbook
Private workbook = New WorkBook()
' Add a new Worksheet named "Sales Data"
Private worksheet = workbook.CreateWorkSheet("Sales Data")

' Populate the Worksheet with data
Private worksheet("A1").Value = "Month"
Private worksheet("B1").Value = "Sales"
Private worksheet("A2").Value = "January"
Private worksheet("B2").Value = 5000
Private worksheet("A3").Value = "February"
Private worksheet("B3").Value = 6000

' Save the Workbook as an Excel file
workbook.SaveAs("SalesReport.xlsx")

This code creates a workbook, adds a worksheet, and populates it with sales data before saving it as an Excel file.

IronXL supports standard Excel notation, enabling developers to reference cells like 'A1' for reading and manipulating data.

Reading Excel Files

Reading and extracting information from Excel files is crucial for data processing applications. IronXL allows you to open existing Excel files and read their content without Excel interop.

Here’s a code example:

using IronXL;

// Load an existing Excel file
var workbook = WorkBook.Load("FinancialData.xlsx");

// Access a specific worksheet by name
var worksheet = workbook.GetWorkSheet("Quarterly Report");

// Read values from specific cells
string quarter = worksheet["A2"].StringValue;
double revenue = worksheet["B2"].DoubleValue;
double expenses = worksheet["C2"].DoubleValue;

// You can also iterate over rows and columns if needed
foreach (var row in worksheet.Rows)
{
    foreach (var cell in row)
    {
        Console.WriteLine(cell.Value);
    }
}

using IronXL;

// Load an existing Excel file
var workbook = WorkBook.Load("FinancialData.xlsx");

// Access a specific worksheet by name
var worksheet = workbook.GetWorkSheet("Quarterly Report");

// Read values from specific cells
string quarter = worksheet["A2"].StringValue;
double revenue = worksheet["B2"].DoubleValue;
double expenses = worksheet["C2"].DoubleValue;

// You can also iterate over rows and columns if needed
foreach (var row in worksheet.Rows)
{
    foreach (var cell in row)
    {
        Console.WriteLine(cell.Value);
    }
}

Imports IronXL

' Load an existing Excel file
Private workbook = WorkBook.Load("FinancialData.xlsx")

' Access a specific worksheet by name
Private worksheet = workbook.GetWorkSheet("Quarterly Report")

' Read values from specific cells
Private quarter As String = worksheet("A2").StringValue
Private revenue As Double = worksheet("B2").DoubleValue
Private expenses As Double = worksheet("C2").DoubleValue

' You can also iterate over rows and columns if needed
For Each row In worksheet.Rows
	For Each cell In row
		Console.WriteLine(cell.Value)
	Next cell
Next row

This code demonstrates how to load an Excel file, access a specific worksheet, and read values from cells, including iterating over rows and columns.

Writing Data to Excel Files

Modifying Excel files is a frequent requirement. IronXL allows you to write and update data in Excel files with ease.

The following example illustrates adding and updating data in an Excel file:

using IronXL;

// Load an existing Excel file
var workbook = WorkBook.Load("EmployeeData.xlsx");
var worksheet = workbook.DefaultWorkSheet;

// Adding new data to cells
worksheet["A4"].Value = "John Doe";
worksheet["B4"].Value = "Sales";
worksheet["C4"].Value = 45000;

// Updating existing data
worksheet["C2"].Value = 50000; // Update salary of an existing employee

// Save the changes to a new file
workbook.SaveAs("UpdatedEmployeeData.xlsx");

using IronXL;

// Load an existing Excel file
var workbook = WorkBook.Load("EmployeeData.xlsx");
var worksheet = workbook.DefaultWorkSheet;

// Adding new data to cells
worksheet["A4"].Value = "John Doe";
worksheet["B4"].Value = "Sales";
worksheet["C4"].Value = 45000;

// Updating existing data
worksheet["C2"].Value = 50000; // Update salary of an existing employee

// Save the changes to a new file
workbook.SaveAs("UpdatedEmployeeData.xlsx");

Imports IronXL

' Load an existing Excel file
Private workbook = WorkBook.Load("EmployeeData.xlsx")
Private worksheet = workbook.DefaultWorkSheet

' Adding new data to cells
Private worksheet("A4").Value = "John Doe"
Private worksheet("B4").Value = "Sales"
Private worksheet("C4").Value = 45000

' Updating existing data
Private worksheet("C2").Value = 50000 ' Update salary of an existing employee

' Save the changes to a new file
workbook.SaveAs("UpdatedEmployeeData.xlsx")

In this example, new data is added to an Excel file, and existing data is updated, showcasing the flexibility of IronXL in data manipulation.

Exporting Excel Data

Exporting data from Excel files to other formats is often required for data analysis and reporting. IronXL simplifies this process.

Here’s how you can export data from an Excel file to a CSV format:

using IronXL;

// Load the Excel file
var workbook = WorkBook.Load("ProjectData.xlsx");

// Export the entire Workbook or a specific Worksheet to CSV
workbook.SaveAsCsv("ProjectData.csv");

// You can also export to other formats like JSON
workbook.SaveAsJson("ProjectData.json");

using IronXL;

// Load the Excel file
var workbook = WorkBook.Load("ProjectData.xlsx");

// Export the entire Workbook or a specific Worksheet to CSV
workbook.SaveAsCsv("ProjectData.csv");

// You can also export to other formats like JSON
workbook.SaveAsJson("ProjectData.json");

Imports IronXL

' Load the Excel file
Private workbook = WorkBook.Load("ProjectData.xlsx")

' Export the entire Workbook or a specific Worksheet to CSV
workbook.SaveAsCsv("ProjectData.csv")

' You can also export to other formats like JSON
workbook.SaveAsJson("ProjectData.json")

This code snippet demonstrates the conversion of Excel files to CSV and JSON formats, highlighting IronXL's versatility in handling different file formats.

Working with Data Tables

Converting between Excel sheets and .NET data tables is a feature that enhances the flexibility of data handling in IronXL. This functionality is particularly useful for scenarios involving bulk data operations or when interfacing with databases.

using IronXL;
using System.Data;

// Load an existing Excel file
var workbook = WorkBook.Load("EmployeeRecords.xlsx");
var worksheet = workbook.DefaultWorkSheet;

// Convert the Worksheet to a DataTable
DataTable dataTable = worksheet.ToDataTable(true);

using IronXL;
using System.Data;

// Load an existing Excel file
var workbook = WorkBook.Load("EmployeeRecords.xlsx");
var worksheet = workbook.DefaultWorkSheet;

// Convert the Worksheet to a DataTable
DataTable dataTable = worksheet.ToDataTable(true);

Imports IronXL
Imports System.Data

' Load an existing Excel file
Private workbook = WorkBook.Load("EmployeeRecords.xlsx")
Private worksheet = workbook.DefaultWorkSheet

' Convert the Worksheet to a DataTable
Private dataTable As DataTable = worksheet.ToDataTable(True)

Performance Optimization for Large Excel Files

Handling large Excel files efficiently is a key feature of IronXL, making it suitable for enterprise-level applications dealing with substantial amounts of data.

IronXL is designed to minimize memory usage and optimize performance when working with large Excel files.

It achieves this through efficient data handling algorithms and by allowing selective reading of worksheets and cells, thereby reducing the load on system resources.

Handling Excel File Formats

IronXL supports various Excel file formats, ensuring compatibility across different versions of Excel and other spreadsheet software.

using IronXL;

// Creating a workbook
var workbook = new WorkBook();

// You can save the Workbook in various formats
workbook.SaveAs("ExcelDocument.xlsx"); // XLSX format
workbook.SaveAs("ExcelDocument.xls");  // XLS format
workbook.SaveAsCsv("ExcelDocument.csv");  // CSV format

using IronXL;

// Creating a workbook
var workbook = new WorkBook();

// You can save the Workbook in various formats
workbook.SaveAs("ExcelDocument.xlsx"); // XLSX format
workbook.SaveAs("ExcelDocument.xls");  // XLS format
workbook.SaveAsCsv("ExcelDocument.csv");  // CSV format

Imports IronXL

' Creating a workbook
Private workbook = New WorkBook()

' You can save the Workbook in various formats
workbook.SaveAs("ExcelDocument.xlsx") ' XLSX format
workbook.SaveAs("ExcelDocument.xls") ' XLS format
workbook.SaveAsCsv("ExcelDocument.csv") ' CSV format

This example shows how IronXL can create and save documents in XLSX, XLS, and CSV formats, providing flexibility in how data is stored and shared.