如何GridView中点击链接实现下载功能

Question

我用Gridview绑定一些文件的名字，希望点击文件名就可以下载该文件。文件的上传我已经实现，可是很难实现我说的上述下载功能。    <asp:GridView ID="GridView3" runat="server" AutoGenerateColumns="False" CellPadding="4"
        ForeColor="#333333" GridLines="None" Width="603px" DataKeyNames="SoftID" OnRowDeleting="GridView3_RowDeleting">
        <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
        <Columns>
            <asp:BoundField DataField="SoftID" HeaderText="SoftID" Visible="False">
                <ItemStyle HorizontalAlign="Center" />
                <HeaderStyle HorizontalAlign="Center" />
            </asp:BoundField>
            <asp:HyperLinkField DataNavigateUrlFields="SoftID" DataNavigateUrlFormatString="Soft.aspx?SoftID={0}"
                DataTextField="SoftName" HeaderText="软件标题">
                <ItemStyle HorizontalAlign="Center" />
                <HeaderStyle HorizontalAlign="Center" />
            </asp:HyperLinkField>
            <asp:BoundField DataField="SoftContent" HeaderText="软件介绍">
                <ItemStyle HorizontalAlign="Center" />
                <HeaderStyle HorizontalAlign="Center" />
            </asp:BoundField>
            <asp:HyperLinkField DataNavigateUrlFields="SoftID" DataNavigateUrlFormatString="Soft.aspx?SoftID={0}"
                DataTextField="SoftLogin" HeaderText="下载" />
            <asp:CommandField DeleteText="删除软件" HeaderText="删除软件" ShowDeleteButton="True" />
        </Columns>
        <RowStyle BackColor="#E3EAEB" />
        <EditRowStyle BackColor="#7C6F57" />
        <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
        <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
        <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
        <AlternatingRowStyle BackColor="White" />
    </asp:GridView>

Answer 1

如果是把附件之类的通过FileUpload控件上传到数据库的varbinary(MAX)这样的字段里，那么建议存进数据库之前，通过FileUpload的一些属性，把文件名及文件类型也存进去。然后显示（或下载）时，通过对应的类型修改Reponse的Header，然后就可以Response.BinaryWrite()了。这个可以用ashx处理。

Answer 2

麻烦问一下，你这个GridView下载功能实现了吗？我现在也遇到了同样的问题，也是在做毕设，麻烦帮一下忙呗~~~谢谢

Answer 3

我也是想实现这个功能，可写好后下载的居然是当前页面，如果用listbox就可以实现
前台<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
                        CellPadding="4" DataKeyNames="ID" ForeColor="#333333" GridLines="None" 
                        onrowcommand="GridView1_RowCommand">
                        <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                        <RowStyle BackColor="#EFF3FB" />
                        <Columns>
                            <asp:BoundField DataField="txt" HeaderText="内容" />
                            <asp:ButtonField CommandName="DownLoad" HeaderText="下载" Text="下载" 
                                DataTextField="Files" />
                        </Columns>
                        <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
                        <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
                        <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                        <EditRowStyle BackColor="#2461BF" />
                        <AlternatingRowStyle BackColor="White" />
                    </asp:GridView>
后台
   protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        int index = int.Parse(e.CommandArgument.ToString());
        if (e.CommandName == "DownLoad")
        {
            string g = this.GridView1.DataKeys[index].Value .ToString();
            if (g != "")
            {
                DataTable dt=Class1.GetTxtID(g);
                DataRowView rv = dt.DefaultView[0];
                Session["txt"] = rv["Files"].ToString();
                if (Session["txt"] != null )
                {
                    
                    string path = Server.MapPath("File/") + Session["txt"].ToString();
                    FileInfo fi = new FileInfo(path);
                    if (fi.Exists)
                    {
                        Response.Clear();
                        Response.AddHeader("Content-Disposition", "attachment;filement=" + Server.UrlEncode(fi.Name));
                        Response.AddHeader("Content-Length", fi.Length.ToString());
                        Response.ContentType = "application/octed-stream";
                        Response.Filter.Close();
                        Response.WriteFile(fi.FullName);
                        Response.End();
                    }
                }
            }
            else
            {
                Page.RegisterStartupScript("sb3", "<script>alert('请先选择需要下载的文件，谢谢！')</script>");
            }
        }
        
            
    }