Blazor 使用 IronXL 在 C# 中读取 Excel 文件（示例教程）

<PackageReference Include="IronXL.Excel" Version="*" />

@using IronXL;
@using System.Data;

@page "/fetchdata"

<PageTitle>Excel File Viewer</PageTitle>

<h1>Open Excel File to View</h1>

<InputFile OnChange="@OpenExcelFileFromDisk" />

<table>
    <thead>
        <tr>
            @foreach (DataColumn column in displayDataTable.Columns)
            {
                <th>
                    @column.ColumnName
                </th>
            }
        </tr>
    </thead>
    <tbody>
        @foreach (DataRow row in displayDataTable.Rows)
        {
            <tr>
                @foreach (DataColumn column in displayDataTable.Columns)
                {
                    <td>
                        @row [column.ColumnName].ToString()
                    </td>
                }
            </tr>
        }
    </tbody>
</table>

@code {
    // Create a DataTable
    private DataTable displayDataTable = new DataTable();

    // When a file is uploaded to the App using the InputFile, trigger:
    async Task OpenExcelFileFromDisk(InputFileChangeEventArgs e)
    {
        IronXL.License.LicenseKey = "PASTE TRIAL OR LICENSE KEY";

        // Open the File to a MemoryStream object
        MemoryStream ms = new MemoryStream();

        await e.File.OpenReadStream().CopyToAsync(ms);
        ms.Position = 0;

        // Define variables for IronXL
        WorkBook loadedWorkBook = WorkBook.FromStream(ms);
        WorkSheet loadedWorkSheet = loadedWorkBook.DefaultWorkSheet; // Or use .GetWorkSheet()

        // Add header Columns to the DataTable
        RangeRow headerRow = loadedWorkSheet.GetRow(0);
        for (int col = 0 ; col < loadedWorkSheet.ColumnCount ; col++)
        {
            displayDataTable.Columns.Add(headerRow.ElementAt(col).ToString());
        }

        // Populate the DataTable
        for (int row = 1 ; row < loadedWorkSheet.RowCount ; row++)
        {
            IEnumerable<string> excelRow = loadedWorkSheet.GetRow(row).ToArray().Select(c => c.ToString());
            displayDataTable.Rows.Add(excelRow.ToArray());
        }
    }
}

Private IronXL As [using]
Private System As [using]

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'@page "/fetchdata" (Of PageTitle) Excel File Viewer</PageTitle> (Of h1) Open Excel File @to View</h1> <InputFile OnChange="@OpenExcelFileFromDisk" /> (Of table) (Of thead) (Of tr) @foreach(DataColumn column in displayDataTable.Columns)
'			{
'				<th> @column.ColumnName </th>
'			}
'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'		</tr> </thead> (Of tbody) @foreach(DataRow row in displayDataTable.Rows)
'		{
'			<tr> @foreach(DataColumn column in displayDataTable.Columns)
'				{
'					<td> @row [column.ColumnName].ToString() </td>
'				}
'			</tr>
'		}
'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	</tbody> </table> @code
'	{
'	' Create a DataTable
'	private DataTable displayDataTable = New DataTable();
'
'	' When a file is uploaded to the App using the InputFile, trigger:
'	async Task OpenExcelFileFromDisk(InputFileChangeEventArgs e)
'	{
'		IronXL.License.LicenseKey = "PASTE TRIAL OR LICENSE KEY";
'
'		' Open the File to a MemoryStream object
'		MemoryStream ms = New MemoryStream();
'
'		await e.File.OpenReadStream().CopyToAsync(ms);
'		ms.Position = 0;
'
'		' Define variables for IronXL
'		WorkBook loadedWorkBook = WorkBook.FromStream(ms);
'		WorkSheet loadedWorkSheet = loadedWorkBook.DefaultWorkSheet; ' Or use .GetWorkSheet()
'
'		' Add header Columns to the DataTable
'		RangeRow headerRow = loadedWorkSheet.GetRow(0);
'		for (int col = 0 ; col < loadedWorkSheet.ColumnCount ; col++)
'		{
'			displayDataTable.Columns.Add(headerRow.ElementAt(col).ToString());
'		}
'
'		' Populate the DataTable
'		for (int row = 1 ; row < loadedWorkSheet.RowCount ; row++)
'		{
'			IEnumerable<string> excelRow = loadedWorkSheet.GetRow(row).ToArray().@Select(c => c.ToString());
'			displayDataTable.Rows.Add(excelRow.ToArray());
'		}
'	}
'}