UpdatePanelscriptMangerEnablePartialRenderingfalse(scriptMangerEnablePartialRenderingtrue)
UpdatePanel

:

<asp:ScriptManager runat="server" >
</asp:ScriptManager>
<asp:UpdatePanel runat="server" ChildrenAsTriggers="true" UpdateMode="Always" RenderMode="Block">
<ContentTemplate>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger />
<asp:PostBackTrigger />
</Triggers>
</asp:UpdatePanel>

1ChildrenAsTriggers :