Member Avatar for Moss ali

i am working in a form where i have used some javascript alert Popups before using
<asp:updatepanel /> the java script was working fine but when i applied the updatepanel the java script popups are not working plz help me out.

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Partial postbacks from an UpdatePanel do not perform a full page load, so client-side code that runs only on the initial load (for example window.onload or $(document).ready) will not automatically run again when the panel updates. is on the right track — the easiest server-side fix is to register the JavaScript so it is emitted and executed after the async postback.

Example server-side (C#): register a safe alert string from code-behind so it runs after the UpdatePanel update.

string message = "Saved successfully";
string script = "alert('" + HttpUtility.JavaScriptStringEncode(message) + "');";
ScriptManager.RegisterStartupScript(this, this.GetType(), "savedMsg", script, true);

Client-side alternatives (no server call needed): bind a handler that runs after partial postbacks. Sys.Application.add_load runs on both full and partial loads; PageRequestManager events run only for async requests.

Sys.Application.add_load(function() {
    alert('Runs after full and partial postbacks');
});

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(function() {
    // runs after async postbacks only
});

Troubleshooting checklist: make sure a ScriptManager (or ScriptManagerProxy) is on the page; check the browser console for JavaScript errors that might prevent execution; escape quotes in messages (use HttpUtility.JavaScriptStringEncode); use a unique key when registering scripts so they are not ignored; remember that inline script blocks injected into UpdatePanel markup are not always executed on async updates. Finally, avoid using blocking alert in production — prefer a non-blocking toast or console log.

Member Avatar for hericles

Hi,
You will want to have a look at the
ScriptManager.RegisterStartupScript() function. You can assign your javascript code via this method to the updatepanel and then it should fire everytime insteadof just on a full page load.

Hope that helps,

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