How to export excel under asp.net ajax

C # code:

Protected void page_load (object sender, eventargs e)

{

Postbacktrigger trigger = new postbacktrigger ();

Trigger. controlid = "btn_export ";

(Updatepanel) page. controls [0]. findcontrol ("updatepanel1"). triggers. add (trigger );

}  

 

// Reload the verifyrenderinginserverform method. Otherwise, the following error message is displayed during running: the "gridview1" control of the "gridview" type must be placed in the form tag with runat = server"
  

Public override void verifyrenderinginserverform (control)
    {
// Override verifyrenderinginserverform.
    }

 

Front-end code:

<Asp Tutorial: updatepanel id = "updatepanel1" runat = "server">

<Contenttemplate>

<Span style = "color: #000000; font-family: ">

<Asp: button id = "btn_export" runat = "server" text = "export" css tutorial class = "button100" width = "80px" onclick = "button6_click"/> </span>

<Asp: gridview id = "gv_oil" runat = "server"

Cellpadding = "4" forecolor = "#333333" gridlines = "none" width = "100%">

<Footerstyle backcolor = "#507cd1" font-bold = "true" forecolor = "white"/>

<Rowstyle backcolor = "# eff3fb"/>

<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>

</Contenttemplate>

<Triggers>

</Triggers>

</Asp: updatepanel

Excel in ajax cannot be exported in the original method, because response in asynchronous mode. write errors occur. When loading a page, you can register the export button as a synchronization method. At the same time, you cannot register the export button in updatepanel to solve this problem. [This solution can be solved with ajax provided by vs. After finding ajax on the Internet for a long time, many of them use third-party ajax (not provided by vs) to export excel.