gridview内实现文件下载

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gridview内实现文件下载
实现起来有点迷惑性,用了几种方法,最后用a实现。

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    
<title>无标题页</title>
</head>
<body>
    
<form id="form1" runat="server">
    
<div>
        
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString
="<%$ ConnectionStrings:testConnectionString %>"
            SelectCommand
="SELECT * FROM [files]"></asp:SqlDataSource>
    
    
</div>
        
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID
="SqlDataSource1">
            
<Columns>
                
<asp:BoundField DataField="id" HeaderText="id" SortExpression="id" />
                
<asp:BoundField DataField="upload_file" HeaderText="upload_file"
SortExpression
="upload_file" />
                
<asp:BoundField DataField="file_name" HeaderText="file_name"
ortExpression
="file_name" />
                
               
                
                
                 
<asp:TemplateField><ItemTemplate>
   
<href='<%#DataBinder.Eval(Container.DataItem,"file_name")%>' target="_blank">下载</a> 
   
</Itemtemplate></asp:TemplateField>
                
                
                
            
</Columns>
        
</asp:GridView>
       

       
    
</form>
</body>
</html>
 
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