如何更改ReportViewer的MIME类型？

Question

我用reportviewer渲染和扩展，但是这些代码以旧文件扩展名扩展。 例如，我想用.xlsx创建，但它创建xls。 如何更改默认的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类型有所不同

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， 什么是Excel文件的正确内容类型？