[ASP.NET]使用 GridView.TemplateField實作Link Button觸發下載檔案的動作(Use GridView.TemplateField implementation Linkbutton trigger action download files)

問題

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使用 GridView.TemplateField實作Link Button觸發下載檔案的動作



解決方法

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在LinkButton事件哩,加入程式碼: .cs

protected void lbtFileName_Click(object sender, EventArgs e)
{    
 LinkButton btn = (LinkButton)sender;
    TableCell tc = (TableCell)btn.Parent;
    GridViewRow gvr = (GridViewRow)tc.Parent;
    int rowindex = gvr.RowIndex;
        //資料來源
    DataTable tb = db.GetContentByGID(Convert.ToInt32(gvNotice.DataKeys[rowindex].Value));
    DataRow row = tb [0];    //下載檔案
    Response.Clear();
    string fileName = Server.UrlPathEncode(Convert.ToString(row["FileName"]));
    Response.Expires = 0;
    Response.Buffer = true;
    Response.AddHeader("Accept-Language", "zh-tw");
    Response.AddHeader("content-disposition", string.Format("attachment;filename={0}", fileName));     //Response.Cache.SetNoStore();
    //Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.ContentType = "application/octet-stream";
    Response.AddHeader("Content-Length", row.NContent.Length.ToString());
    Response.BinaryWrite(row.NContent);
    Response.End();
}

.aspx
設定LinkButton顯示的文字:

<asp:TemplateField HeaderText="文件名稱" SortExpression="FileName">
<ItemTemplate>
<asp:LinkButton ID="lbtFileName" runat="server" CommandName="OpenFile" onclick="lbtFileName_Click"  > <%#Eval("FileName") %></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>