如何在未安装 Excel 的情况下使用 C# 读取 OpenOffice Excel 文件

Install-Package IronXL
dotnet add package IronXL

using IronXL;

WorkBook workbook  = WorkBook.Load("customers.xlsx");
WorkSheet worksheet = workbook.WorkSheets[0];

Console.WriteLine($"Total rows    : {worksheet.RowCount}");
Console.WriteLine($"Total columns : {worksheet.ColumnCount}");
Console.WriteLine();

foreach (var row in worksheet.Rows)
{
    foreach (var cell in row)
    {
        if (!cell.IsEmpty)
            Console.Write($"{cell.StringValue,-20}");
    }
    Console.WriteLine();
}

Imports IronXL

Dim workbook As WorkBook = WorkBook.Load("customers.xlsx")
Dim worksheet As WorkSheet = workbook.WorkSheets(0)

Console.WriteLine($"Total rows    : {worksheet.RowCount}")
Console.WriteLine($"Total columns : {worksheet.ColumnCount}")
Console.WriteLine()

For Each row In worksheet.Rows
    For Each cell In row
        If Not cell.IsEmpty Then
            Console.Write($"{cell.StringValue,-20}")
        End If
    Next
    Console.WriteLine()
Next

using IronXL;

WorkBook workbook = WorkBook.Load("inventory.xlsx");
WorkSheet sheet   = workbook.GetWorkSheet("Products");

// Typed accessors handle conversion automatically
string  productName = sheet["A2"].StringValue;
int     quantity    = sheet["B2"].IntValue;
decimal unitPrice   = sheet["C2"].DecimalValue;
bool    inStock     = sheet["D2"].BoolValue;
DateTime? lastAudit = sheet["E2"].DateTimeValue;

Console.WriteLine($"Product  : {productName}");
Console.WriteLine($"Qty      : {quantity}");
Console.WriteLine($"Price    : {unitPrice:C}");
Console.WriteLine($"In Stock : {inStock}");
Console.WriteLine($"Audited  : {lastAudit?.ToString("d") ?? "Never"}");

Imports IronXL

Dim workbook As WorkBook = WorkBook.Load("inventory.xlsx")
Dim sheet As WorkSheet = workbook.GetWorkSheet("Products")

' Typed accessors handle conversion automatically
Dim productName As String = sheet("A2").StringValue
Dim quantity As Integer = sheet("B2").IntValue
Dim unitPrice As Decimal = sheet("C2").DecimalValue
Dim inStock As Boolean = sheet("D2").BoolValue
Dim lastAudit As DateTime? = sheet("E2").DateTimeValue

Console.WriteLine($"Product  : {productName}")
Console.WriteLine($"Qty      : {quantity}")
Console.WriteLine($"Price    : {unitPrice:C}")
Console.WriteLine($"In Stock : {inStock}")
Console.WriteLine($"Audited  : {If(lastAudit?.ToString("d"), "Never")}")

using IronXL;

WorkBook workbook = WorkBook.Load("annual_sales.xlsx");

// Option 1: access by name (throws if the sheet does not exist)
WorkSheet januarySheet = workbook.GetWorkSheet("January");

// Option 2: iterate all sheets in the workbook
foreach (WorkSheet ws in workbook.WorkSheets)
{
    Console.WriteLine($"Sheet: {ws.Name}  |  Rows: {ws.RowCount}");

    // Read the header row from each sheet
    string header = ws["A1"].StringValue;
    Console.WriteLine($"  Header: {header}");
}

// Option 3: access by zero-based index
WorkSheet lastSheet = workbook.WorkSheets[workbook.WorkSheets.Count - 1];
Console.WriteLine($"Last sheet: {lastSheet.Name}");

Imports IronXL

Dim workbook As WorkBook = WorkBook.Load("annual_sales.xlsx")

' Option 1: access by name (throws if the sheet does not exist)
Dim januarySheet As WorkSheet = workbook.GetWorkSheet("January")

' Option 2: iterate all sheets in the workbook
For Each ws As WorkSheet In workbook.WorkSheets
    Console.WriteLine($"Sheet: {ws.Name}  |  Rows: {ws.RowCount}")

    ' Read the header row from each sheet
    Dim header As String = ws("A1").StringValue
    Console.WriteLine($"  Header: {header}")
Next

' Option 3: access by zero-based index
Dim lastSheet As WorkSheet = workbook.WorkSheets(workbook.WorkSheets.Count - 1)
Console.WriteLine($"Last sheet: {lastSheet.Name}")