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  • C#使用RenderControl将GridView控件导出到EXCEL的方法

    本文实例展示了C#使用RenderControl将GridView控件导出到EXCEL的方法,是非常实用的一个功能,分享给大家供大家参考。具体如下:

    主要功能代码如下:

    // 把GridView输出到Excel文件 
    private void ExportExcel(GridView gridView, string title, string title2, string fileName)
    {
      int nHideCols = 0;
      //如果不想输出出某列,将Visible设为false即可
      for (int i = 0; i < gridView.Columns.Count; i++)
      {
     if (gridView.Columns[i].HeaderText == "设备状态")
     {
       gridView.Columns[i].Visible = false;
       gridView.Columns[i].ControlStyle.Width = 0;
       nHideCols = 1;
       break;
     }
      }
      //设定显示字符集
      Response.Charset = "utf-8";
      //设定内容字符集
      Response.ContentEncoding = Encoding.GetEncoding("utf-8"); 
      
      //设定文件名
      Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, Encoding.UTF8).Replace('+', '_').Replace('-', '_'));
      //设定文件类型  也可以是application/ms-word,也可以是text/html(字符集设为gb2312)
      Response.ContentType = "application/ms-excel";
      this.EnableViewState = false;
      using (StringWriter tw = new StringWriter())
      {
     using (HtmlTextWriter hell = new HtmlTextWriter(tw))
     {
       gridView.AllowPaging = false;
       gridView.RenderControl(hell);
       string s = tw.ToString();
       s = s.Replace("
    ", "");
       int index = s.IndexOf("<tr");
       //可以自定义Excel文件的标题
       string head = "<tr><td colspan="" + (gridView.Columns.Count - nHideCols).ToString() + "" style="text-align: center; height: 42px; font-size: 24px; font-weight: bolder; color: #000000;">" + title + "</td></tr>" +
       "<tr><td colspan="" + (gridView.Columns.Count - nHideCols).ToString() + "" style="text-align: center; height: 24px; font-size: 12px; color: #000000;">" + title2 + "</td></tr>";
       //使用Index来判断是否存在数据,当然也可以用gridView.Rows.Count来判断
       if (index != -1)
       {
     //有数据的
     s = s.Insert(index, head);
       }
       else
       {
     //没有数据的时候
     s = "<table cellspacing="0" cellpadding="3" rules="rows" border="1" id="" + gridView.ID + "" style="background-color:White;border-color:#E7E7FF;border-1px;border-style:None;border-collapse:collapse;">" +
       head + "</table>";
       }
       Response.Write(s);
       Response.End();
     }
      }
    }
    //同时vs2005,vs2003会报错“类型“ExGridView”的控件“GridViewMaster”必须放在具有 runat=server 的窗体标记内
    //需要添加下面取消对GridViewMaster 控件验证的方法
    public override void VerifyRenderingInServerForm(Control control)
    {
      if (!control.GetType().Equals(gridView.GetType()))
      {
     base.VerifyRenderingInServerForm(control);
      }
    }



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  • 原文地址:https://www.cnblogs.com/zztong/p/6695158.html
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