c# excel 导出 流

C#中可以使用Microsoft.Office.Interop.Excel库来实现Excel导出。下面是一个示例代码，可以将数据导出到Excel表格中并保存为流：

using Microsoft.Office.Interop.Excel;
using System.IO;

public MemoryStream ExportToExcel(DataTable data)
{
    Application excel = new Application();
    Workbook workbook = excel.Workbooks.Add();

    Worksheet worksheet = workbook.ActiveSheet;

    for (int i = 1; i <= data.Columns.Count; i++)
    {
        worksheet.Cells[1, i] = data.Columns[i - 1].ColumnName;
    }

    for (int i = 0; i < data.Rows.Count; i++)
    {
        for (int j = 0; j < data.Columns.Count; j++)
        {
            worksheet.Cells[i + 2, j + 1] = data.Rows[i][j].ToString();
        }
    }

    MemoryStream memoryStream = new MemoryStream();

    workbook.SaveAs(memoryStream);
    workbook.Close();
    excel.Quit();

    return memoryStream;
}

你可以根据需要修改代码来满足你的需求。