How to call a javascript from master page?

Question

I'm trying to call a javascript alert from a master page, where i got an update panel. Within that a button and a text box.

I need to call the alert on clicking the button in my master page. So far it seems not working. Please help.

 Page.ClientScript.RegisterStartupScript
                        (this.GetType(), "alert", "invokeMeMaster();", true);

This is what i wrote in my button click. invokerMEMaster include just an alert message.I need to reload the page on the ok button click of the alert. How can i do that as well?

Can you post the code that isn't working?

Geoff Appleford
– Geoff Appleford

2011-07-20 10:10:59 +00:00
Commented Jul 20, 2011 at 10:10 — Geoff Appleford
– Geoff Appleford, Commented Jul 20, 2011 at 10:10

Samidjo · Accepted Answer · 2011-07-20 10:18:00Z

1

Update Panel clears javascript code when Postback so try to put this code on the header.

<script type="text/javascript">

$(document).ready(
function(){

   Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler); 
   function EndRequestHandler(sender, args) {//put your code here}

});

</script>

answered Jul 20, 2011 at 10:18

Samidjo

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1 Comment

NewBie Over a year ago

i need to add alert messages from code behind...How am i supposed to call my script if im using this in the source page?

m.edmondson · Accepted Answer · 2011-07-20 10:13:36Z

0

You need a ScriptManagerProxy, with the ScriptManager residing in your content page

answered Jul 20, 2011 at 10:13

m.edmondson

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Comments

Peter · Accepted Answer · 2011-07-20 10:13:57Z

0

If I may guess your problem (psychic debugging): When the update panel updates the javascript is not rendered of fired on your page.

Try to register your javascript like in the update panel:

ScriptManager.RegisterClientScriptBlock(Page,typeof(string),"JavaScriptCall",script.ToString(), false);

answered Jul 20, 2011 at 10:13

Peter

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Comments

Tresto · Accepted Answer · 2011-07-21 20:44:51Z

If I understand your question correctly you have a JS function in a content page that needs to be called from the master page?

What I would do is add a hidden input control and an alert function to your master page:

    <input runat="server" id="hdnAlert" name="Alert" type="hidden" />

    <script type="text/javascript"  language="javascript">  
        function AlertMe(){ alert(document.getElementByID("hdnAlert").value); }
    </script>

You could then change the value of the input control from a content page:

    HtmlInputHidden hdnTemp = new HtmlInputHidden();
    hdnTemp = (HtmlInputHidden)Master.FindControl("hdnAlert");
    hdnTemp.Value = "Message To Alert";

Then just have the button in your master page call the "AlertMe" function located in the master page.

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