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Editorial Team
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Asked: 2026-05-26T20:17:18+00:00

I have a hidden filed <asp:HiddenField ID=hdnCFIV Value=0 runat=server /> I am changing the

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I have a hidden filed

<asp:HiddenField ID="hdnCFIV" Value="0" runat="server" />

I am changing the hidden filed value to 1 on a button click

hdnCFIV.Value = "1";

I am binding the datalist on page load

if(hdnCHIV.Value == "1")

But every time hdnCHIV.Value is showing 0 because my ascx page is reloading, if i’ll keep the binding code in side the if(!IsPostBack) then other functionality will get affected.

How to retain the Hidden Field value once it is getting change from 0 to 1 on post back.
Is there any JavaScript or some other way? Please someone help me.

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1 Answer

  1. Editorial Team

    The problem is that Load event occurs earlier than controls’ events are being handled. So current workflow is like this:

    1. ASP.NET parses the page, sets the hdnCFIV.Value property to 0.
    2. Page_Load is called, hdnCFIV.Value equals 0 so the datalist binding is not performed.
    3. Button click is handled, hdnCFIV.Value is set to 1.

    To resolve this issue you need to perform datalist binding later, when hdnCFIV.Value is already set to 1. You can do this either in the same button click handler or in Page_PreRender.

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