c# - 如何更改reportviewer 的mime 类型？

Question

我使用reportviewer 进行渲染和扩展，但是这些代码使用旧文件扩展名进行扩展。例如，我想用 .xlsx 创建，但它创建 xls。如何更改默认 mimeType？

protected void ExportExcel_Click(object sender, EventArgs e)
{
    Warning[] warnings;
    string[] streamids;
    string mimeType;
    string encoding;
    string extension;
    string filename;

    byte[] bytes = ReportViewer1.LocalReport.Render(
       "Excel", null, out mimeType, out encoding,
        out extension,
       out streamids, out warnings);

    filename = string.Format("{0}.{1}", "ExportToExcel", "xls");
    Response.ClearHeaders();
    Response.Clear();
    Response.AddHeader("Content-Disposition", "attachment;filename=" + filename);
    Response.ContentType = mimeType;
    Response.BinaryWrite(bytes);
    Response.Flush();
    Response.End();
}

Answer 1

对于 Excel 2007 及更高版本，MIME 类型不同

Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

Response.AppendHeader("content-disposition", "attachment; filename=" + filename);

参考：xlsx 的内容类型

另外，excel文件的正确内容类型是什么？