excel - 从 GridView 导出到 Excel 无法正确显示波斯语

Question

通过 SqlDataSource 绑定(bind) GridView，我编写了以下代码以从 GridView 导出到 Excel:

System.IO.StringWriter sw = new System.IO.StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("Content-Disposition", "attachment;filename=" + FileName);
gvReportPrint.GridLines = GridLines.Both;
gvReportPrint.Font.Name = "'BYekan'";

foreach (GridViewRow row in gvReportPrint.Rows)
{
    row.Cells[2].Attributes.Add("class", "textmode");
}

string style = @"<style> .textmode { mso-number-format:\@; } </style>";
gvReportPrint.HeaderStyle.Font.Bold = true;
Response.Write(style);
gvReportPrint.RenderControl(hw);
Response.Output.Write(sw.ToString());
Response.End();

在从 GridView 导出到 Excel 期间，Unicode 字符无法正确显示，
它们显示如下:
--> Click this link to show the problem <--

Answer 1

看来您使用的是 asp:GridView ，我有同样的问题并使用GridView class像下面这样解决它:

public void ToExcel(DataTable dt, string reportName)
    {
        if (dt.Rows.Count > 0)
        {
            string filename = string.Format("{0}.xls", reportName);

            GridView gv = new GridView();

            gv.DataSource = dt;
            gv.HeaderStyle.BackColor = System.Drawing.Color.FromArgb(0, 119, 179);
            gv.HeaderStyle.ForeColor = System.Drawing.Color.FromArgb(250, 250, 250);
            gv.AlternatingRowStyle.BackColor = System.Drawing.Color.FromArgb(191, 191, 191);
            gv.Font.Name = "Tahoma";
            gv.Font.Size = 10;
            gv.DataBind();

            System.IO.StringWriter sw = new System.IO.StringWriter();
            HtmlTextWriter hw = new HtmlTextWriter(sw);
            HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
            HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
            HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + filename);
            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.Unicode;
            HttpContext.Current.Response.BinaryWrite(System.Text.Encoding.Unicode.GetPreamble());

            gv.RenderControl(hw);
            HttpContext.Current.Response.Output.Write(sw.ToString());
            HttpContext.Current.Response.End();
        }
    }

和 dt应该是gridview的数据源。

也请看一下 ASP.NET Excel export encoding problem