GridView绑定链接，点击链接下载

点滴积累，点滴进步~

前段时间，做网站遇到这样的需求，先整理如下。如有什么不妥的地方，还请各位仁兄赐教。尤其到现在，对于手动添加序号的原理还不甚明了，望明白的朋友稍作解释。e.Row.Cells[i]是指向???   先行谢过~

1. 前台代码

其中，第一列是为了为数据添加序号。第二列为链接Report列，若果Report从数据库中读取出来的数据为空，则没有DownloadReport显示；若不为空，点击Download Report下载链接文件。

<asp:GridView ID="grdTest" runat="server" AutoGenerateColumns="False" CellPadding="4"DataKeyNames="TestID" GridLines="None" OnRowDataBound="grdTest_RowDataBound">
    <RowStyle BackColor="#EFF3FB" HorizontalAlign="Left" />
     <Columns>
         <asp:BoundField DataField="TestName" HeaderText="No.">
              <HeaderStyle Width="80px" />
               <ItemStyle HorizontalAlign="Center" />
         </asp:BoundField>
         <asp:TemplateField>
                <ItemTemplate>
                     <asp:LinkButton ID="lbtnView" runat="server" CommandArgument='<%#Eval("ReportLink") %>'
                       Text='<%#Eval("ReportLink")!=""?"Download Report":""%>' OnCommand="lbtnView_Command"></asp:LinkButton>
                 </ItemTemplate>
                  <HeaderTemplate>
                            <asp:Literal ID="Literal1" runat="server" Text="ReportLink"></asp:Literal>
                  </HeaderTemplate>
                   <ItemStyle HorizontalAlign="Center" Width="120px" />
           </asp:TemplateField>
    </Columns>
</asp:GridView>

2. 后台代码.

下载链接，是绑定模板列，通过LinkButton的CommandArgument传递所绑定的值。在LinkButton的OnCommand事件中，实现下载功能。

protected void lbtnView_Command(object sender, CommandEventArgs e)
{
    try
    {
          string fullName = e.CommandArgument.ToString();
          //fullName = @"\\MyComputer\Downloads\911_04-07.xls";
          string fileName = System.IO.Path.GetFileName(fullName);
          if (!string.IsNullOrEmpty(fullName))
          {
             FileInfo downloadFile = new FileInfo(fullName);
             if (downloadFile.Exists)
             {
                  Response.Clear();
                  Response.ClearHeaders();
                  Response.Buffer = false;
                  Response.ContentType = "application/octet-stream";
                  Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));//downloadFile.FullName
                  Response.AppendHeader("Content-Length", downloadFile.Length.ToString());
                  Response.WriteFile(downloadFile.FullName);
                  Response.Flush();
                  Response.End();
               }
          }
          else
          {
             ClientScript.RegisterStartupScript(this.GetType(), "", "alert('Report Link is not Exist !');", true);
          }
    }
    catch
    {

        ClientScript.RegisterStartupScript(this.GetType(), "", "alert('Error,Please report administrator!);", true);
    }
}

//手动为GridView最前面添加序列号
protected void grdTest_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowIndex >= 0)
    {
         e.Row.Cells[0].Text = Convert.ToString(e.Row.DataItemIndex + 1);
    }
}