ASP.NET Excel导出编码问题

Question

我正在 ASP.NET 站点上进行一些 Excel 导出。除了编码之外，一切正常。当我在 Excel 中打开它时，它看起来像这样:

Eingabe Kosten je Gerät Gerät: Gerätebezeichnung: Betriebsmittel Heizöl in €: 4 Dieselverbrauch in €: 4

这是我的代码:

Response.Clear();
Response.ContentType = "application/ms-excel";
Response.AddHeader("Content-Disposition", "inline;filename=NachkalkGeraete.xls;");
var writer = new HtmlTextWriter(Response.Output);

SomeControl.RenderControl(writer); /* FormView, Table, DataGrid... */

Response.End();

我已经尝试显式设置编码..但没有发生任何变化:

Response.Clear();
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("Content-Disposition", "attachment; filename=NachkalkGeraete.xls");

Response.BufferOutput = true;
Response.ContentEncoding = System.Text.Encoding.UTF8;
Response.Charset = "UTF-8";
EnableViewState = false;

System.IO.StringWriter tw = new System.IO.StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(tw);

SomeControl.RenderControl(hw);

Response.Write(tw.ToString());
Response.End();

请问出了什么问题？

Answer 1

我发现问题可能出在 Excel 文件的 header 中，它不包含 BOM 字节序列(位于表示所用编码的文件开头)。

所以我这样做了，它对我有用:

Response.Clear();
Response.AddHeader("content-disposition","attachment;filename=Test.xls");   
Response.ContentType = "application/ms-excel";
Response.ContentEncoding = System.Text.Encoding.Unicode;
Response.BinaryWrite(System.Text.Encoding.Unicode.GetPreamble());

System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new HtmlTextWriter(sw);

FormView1.RenderControl(hw);

Response.Write(sw.ToString());
Response.End();