Unregistering Page.ClientScript in C# Asp.net: A Step-by-Step Guide

I have successfully integrated Java script into my Asp.net code behind file. However, I am facing an issue with update panels on the same page. Every time there is a change in any of the update panels, the script is automatically triggered. Is there a way to prevent this from happening? Removing the update panels is not an option as they are crucial for the functionality of the application. Currently, I am only calling an alert (rad alert with a set timeout function) when the Save Button is clicked or an Update routine is initiated. There are other buttons within the update panels and whenever one of them is clicked, the undesired script gets called. Any assistance would be greatly appreciated.

Below is the Page.ClientScript:

string radalertscript = "<script language='javascript'> Sys.Application.add_load(function(sender, e) {var oWnd = radalert('dialogMessage', 400, 140, 'Saved');window.setTimeout(function () { oWnd.Close(); }, 3000);});</script>";
Page.ClientScript.RegisterStartupScript(this.GetType(), "radalert", radalertscript);

Answer №1

To remove a script, you can assign an empty string to the same key radalert.

if(some_condition)
    Page.ClientScript.RegisterStartupScript(this.GetType(), "radalert", "");

Update: In response to feedback, here's a simpler approach without using RegisterStartupScript.

In the code-behind:

btnSave.Attributes.Add("", "saveButtonFunction();");

In JavaScript:

<script language='javascript'>
   Sys.Application.add_load(function(sender, e) {
           if(btnSaveClicked){
              var oWnd = radalert('dialogMessage', 400,140, 'Saved');
              window.setTimeout(function () { oWnd.Close(); }, 3000);
              btnSaveClicked = false;
           }
    });

    btnSaveClicked = false;
    function saveButtonFunction(){
       btnSaveClicked = true;
    };    
</script>

Answer №2

Adil, thank you for your response. I have implemented a similar approach with a few tweaks. Instead of including JavaScript in my code behind file, I registered the event handler Sys.Application.add_load as shown below:

Sys.Application.add_load(DisplayRadAlertHandler);
function DisplayRadAlertHandler() {
    var getMessage = document.getElementById('<%=radAlertDialogHidden.ClientID%>').value;
    if (getMessage != "") {
        document.getElementById('<%=radAlertDialogHidden.ClientID%>').value = "";
        var oWnd = radalert(getMessage, 400, 140, 'Saved');
        window.setTimeout(function () { oWnd.Close(); }, 3000);
    }
}

In this setup, I store my alert message in a hidden input field using the code behind file and then use the event handler to check if there is a message to display. Your method is valid too, but since I have messages from various sources like Save buttons and Update routines, setting and resetting the hidden input field in the event handler seems more suitable. Thank you once again for your assistance.

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