Error on clicking Linkbutton of Gridview

sudevsu

How to solve this error Error:

Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed.

My ASPX:

<asp:UpdatePanel ID="Upnl1" runat="server">
<Triggers>
<asp:PostBackTrigger ControlID="btnAddLineItems" />
</Triggers>
<ContentTemplate>
<div>
</div>
asp:panel
<table>
txt1
txt2
ddl1
ddl2
File upload
Button Add new Items
</table>
</asp:panel>

<asp:updatepanel>
    <ContentTemplate>
    <Gridview>
    <Boundfield 1=txt1>
    <Boundfield 2=txt2>
    <Boundfield 3=ddl1>
    <Boundfield 4=ddl3>
    <Templatefield Link button="Download">
    </Gridview>
    </ContentTemplate>
<asp:updatepanel>

</ContentTemplate>
</asp:UpdatePanel>

LinkbuttonClick Event:

Dim filePath As String = CType(sender, LinkButton).CommandArgument
Response.ContentType = ContentType
Response.AppendHeader("Content-Disposition", ("attachment; filename=" + Path.GetFileName(filePath)))
Response.WriteFile(filePath)
Response.End()

Your help is much appreciated. Thanks Happy Coding!

sudevsu

I solved this by adding

Dim scriptManager As ScriptManager = scriptManager.GetCurrent(Me.Page)
scriptManager.RegisterPostBackControl(Me.gdvLineItems)

in PageLoad. gdvLineItems is the Grid that has my linkbutton

Your help is much appreciated. Thanks Happy Coding!

Atish K Singh

Add below code in page_load event of the page

ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
scriptManager.RegisterPostBackControl([GridView's LinkButton ID]);