【Vegas原创】页面（图表+table+GridView）导出为excel(07-12-5更新版）

图表+table

    protected void Button3_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "GB2312";
        Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls");
        // 
        Response.ContentEncoding = System.Text.Encoding.UTF7;
        Response.ContentType = "application/ms-excel";//

        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
        //path like http:// 
        string strPath = "select pms_value from code_list where pms_type='chart_path'";
        DataSet ds = db.GetDataSet(strPath);
        string path = ds.Tables[0].Rows[0][0].ToString();

        string imagePath = path + this.DaxonTechChartWeb1.ID + "." + this.DaxonTechChartWeb1.ImageType.ToString();

        oHtmlTextWriter.AddAttribute(HtmlTextWriterAttribute.Src, imagePath);

        //tableExcel is the Table
        tableExcel.RenderControl(oHtmlTextWriter);
        Response.Output.Write(oStringWriter.ToString());

        Response.Flush();
        Response.End();


    }

gridview：

    protected void Button_toExcel_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "GB2312";
        Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls");
        // 如果设置为 GetEncoding("GB2312");导出的文件将会出现乱码！！！
        Response.ContentEncoding = System.Text.Encoding.UTF7;
        Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
       //  turn off paging 
       
        GridView1.AllowPaging = false;
        GridView1.Columns[0].Visible = false;
        GridView1.DataBind(); 
        GridView1.RenderControl(oHtmlTextWriter);
        Response.Output.Write(oStringWriter.ToString());
        Response.Flush();
        Response.End();
        // turn the paging on again 
        GridView1.AllowPaging = true;
        GridView1.DataBind();

    }

07-12-5更新版：
因有些chart在前台有加特效之类的，造成HtmlTextWriter在锁定元件上出错。
此就需要RenderBeginTag和RenderEndTag来全部手动写入。

    protected void Button3_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "GB2312";
        Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls");
        // 
        Response.ContentEncoding = System.Text.Encoding.UTF7;
        Response.ContentType = "application/ms-excel";//

        System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);

        //path
        string strPath = "select pms_value from code_list where pms_type='chart_path'";
        DataSet ds = db.GetDataSet(strPath);
        string path = ds.Tables[0].Rows[0][0].ToString();
        string imagePath = path + this.DaxonTechChartWeb1.ID + "." + this.DaxonTechChartWeb1.ImageType.ToString();
        //this.DaxonTechChartWeb1.ImagePath = imagePath;
        oHtmlTextWriter.RenderBeginTag(HtmlTextWriterTag.Table);
            oHtmlTextWriter.AddAttribute(HtmlTextWriterAttribute.Height, this.DaxonTechChartWeb1.Height.Value.ToString());
            oHtmlTextWriter.RenderBeginTag(HtmlTextWriterTag.Tr);
                oHtmlTextWriter.RenderBeginTag(HtmlTextWriterTag.Td);
                    oHtmlTextWriter.AddAttribute(HtmlTextWriterAttribute.Src, imagePath);
                    oHtmlTextWriter.RenderBeginTag(HtmlTextWriterTag.Img);
                oHtmlTextWriter.RenderEndTag();
            oHtmlTextWriter.RenderEndTag();
            oHtmlTextWriter.RenderBeginTag(HtmlTextWriterTag.Tr);
                oHtmlTextWriter.RenderBeginTag(HtmlTextWriterTag.Td);
                    VegasGood.RenderControl(oHtmlTextWriter);
                oHtmlTextWriter.RenderEndTag();
             oHtmlTextWriter.RenderEndTag();
        oHtmlTextWriter.RenderEndTag();
        Response.Output.Write(oStringWriter.ToString());

        Response.Flush();
        Response.End();

    }