学步园

<mce:script type="text/javascript"><!--<br /> function Download(fileID) {<br /> __doPostBack('<%= LinkButton1.ClientID %>', '');<br /> }<br /> // --></mce:script><br /> <!--注意，切不可放在updatepanel中 --><br /> <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click"></asp:LinkButton>

后台

protected void Grid_InitializeRow(object sender, RowEventArgs e)<br /> {<br /> string fullpath = "";<br /> if (String.IsNullOrEmpty(e.Row.Cells[9].Text))<br /> return;<br /> fullpath = ContextHelper.GetUploadFileURL(e.Row.Cells[9].Text);<br /> state.DownLoadFileGuid = e.Row.Cells[9].Text;<br /> state.FileName = e.Row.Cells[10].Text;<br /> state.Save(Session);<br /> e.Row.Cells[10].Value = (String.IsNullOrEmpty(e.Row.Cells[10].Text)) ?<br /> null : "<a href="#" mce_href="#" onclick=Download('" + e.Row.Cells[9].Text + "'); title='" + e.Row.Cells[10].Text + "'>" + e.Row.Cells[10].Text + "</a>";<br /> }

protected void LinkButton1_Click(object sender, EventArgs e)<br /> {<br /> Response.ContentType = "application/octet-stream";<br /> //通知浏览器下载文件而不是打开<br /> Response.AddHeader("Content-Disposition",<br /> "attachment; filename=" +<br /> HttpUtility.UrlEncode(state.FileName,<br /> System.Text.Encoding.UTF8));<br /> Response.BinaryWrite(<br /> ContextHelper.GetUploadFileData(state.DownLoadFileGuid));<br /> Response.Flush();<br /> Response.End();<br /> }

其中state是自己封装的session类，实际跟session[XX]=XX的操作是一样的,ContextHelper.GetUploadFileData也是自己实现的类，功能是返回文件的二进制数据