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我在用下面代码将gridview导出到excel中时，其中的汉字出现了乱码：
protected void Button2_Click(object sender, EventArgs e)
    {
        GridView1.Focus();
        Response.Clear();
        Response.Buffer = false;
        Response.Charset = "GB2312";
        Response.AppendHeader("Content-Disposition", "attachment;filename=pickmorv.xls");
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        Response.ContentType = "application/ms-excel";
        this.EnableViewState = false;
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
        HtmlTextWriter oHtmlTextWriter = new HtmlTextWriter(oStringWriter);
        GridView1.RenderControl(oHtmlTextWriter);
        Response.Write(oStringWriter.ToString());
        Response.End();
    }
    public override void VerifyRenderingInServerForm(Control control)
    {
        //base.VerifyRenderingInServerForm(control);
    }
使用下列代码时解决了问题：
#region   //将某天的详细数据导出到EXCEL
    protected void Button3_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.Buffer = false;
        Response.Charset = "GB2312";
        Response.AppendHeader("Content-Disposition", "attachment;filename=pkmv_de.xls");
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        Response.ContentType = "application/ms-excel";
        Response.Write("<meta http-equiv=Content-Type content=\"text/html; charset=GB2312\">");
        this.EnableViewState = false;
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
        HtmlTextWriter oHtmlTextWriter = new HtmlTextWriter(oStringWriter);
        GridView2.RenderControl(oHtmlTextWriter);
        Response.Write(oStringWriter.ToString());
        Response.End();
    }
 public override void VerifyRenderingInServerForm(Control control)
    {
        //base.VerifyRenderingInServerForm(control);
    }
    #endregion

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