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出错1:类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内
解决方案:在后台文件中重载VerifyRenderingInServerForm方法,如:
public override void VerifyRenderingInServerForm(Control control)
{
}
出错2:只能在执行 Render() 的过程中调用 RegisterForEventValidation(RegisterForEventValidation can only be called during Render();
解决方案:在源中,添加红色部分<%@ Page Language="C#" EnableEventValidation = "false"CodeFile="ExportGridView.aspx.cs" Inherits="ExportGridView" %>
另外,在使用时,把GRIDVIEW获取数据的方法getdata()写成public DataSet getdata(),return 一个DS,
调用事件里,实例化一个DATASET, 让它值等于DS,
protected void btnExcel_Click(object sender, EventArgs e) { grid.AllowPaging = false; grid.AllowSorting = false; grid.Columns[7].Visible = false; GridBindAll(); DateTime dt = DateTime.Now; string str = dt.ToString("yyyyMMddhhmmss"); str = str + ".xls"; GridViewToExcel(grid, "application/ms-excel", str); grid.AllowPaging = true; grid.AllowSorting = true; grid.Columns[2].Visible = true; GridViewBind(); // Export(gvRecord, "application/ms-excel", str); } /// <summary> /// 将网格数据导出到Excel /// </summary> /// <param name="ctrl">网格名称(如GridView1)</param> /// <param name="FileType">要导出的文件类型(Excel:application/ms-excel)</param> /// <param name="FileName">要保存的文件名</param> public static void GridViewToExcel(Control ctrl, string FileType, string FileName) { HttpContext.Current.Response.Charset = "GB2312"; HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;//注意编码 HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8).ToString()); HttpContext.Current.Response.ContentType = FileType;//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword ctrl.Page.EnableViewState = false; StringWriter tw = new StringWriter(); HtmlTextWriter hw = new HtmlTextWriter(tw); ctrl.RenderControl(hw); HttpContext.Current.Response.Write("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />" + tw.ToString()); HttpContext.Current.Response.End(); } public override void VerifyRenderingInServerForm(Control control) { //base.VerifyRenderingInServerForm(control); }
注意：只是导出了在GridView中的列，没有把数据库中的其它没有展示的列都导出。
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原文地址：http://www.cnblogs.com/BrokenIce/p/5836416.html
