Calling Java Script Alert Function when entire ASP.Net Page gets load

Question

I used JavaScipt Alert function in ASP.net4.0 code behind file of content Page

public void Show(string message)
 {

  Page.RegisterClientScript(this.GetType(), "Alert", "<script type=text/javascript>alert('+message+')</script>");         
 }

When i click on button to get this script call then the alert message came on blank screen then the same screen gets loaded fully.

I want this message after loading the whole page(Msg will get displayed on same page with back controls) and then msg is displayed. Using Master Pages and content Pages..

Please help on

Tim Schmelter · Accepted Answer · 2012-04-10 15:20:24Z

1

If you want to show it when the document is loaded, use RegisterStartupScript:

 public void Show(string message)
 {
     ClientScriptManager cs = Page.ClientScript;
     Type myType = this.GetType();
     // Check to see if the startup script is already registered.
     if (!cs.IsStartupScriptRegistered(myType, "AlertScript"))
     {
         String script = "alert('" + cleanMessage + "')";
         cs.RegisterStartupScript(myType, "AlertScript", script, true);
     }
 }

RegisterStartupScript will render your script after all the elements in the page, this will ensure that it runs after the other DOM elements are loaded.

answered Apr 10, 2012 at 15:20

Tim Schmelter

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1 Comment

user1324392 Over a year ago

forgot to include this RegisterStartUpScript but I also used the same but nothing happened..The problem remains same.

Anish V · Accepted Answer · 2013-07-02 05:38:11Z

1

Setting a timeout period which will allow all the controls in the page to load may also works. See the code below which works for me.

private void MessageBox(string Msg) { ClientScript.RegisterStartupScript(this.GetType(), "AlertMsg", "<script language='javascript'> setTimeout(function () { alert('" + Msg + "') }, 500); </script>"); }

PS: Please change the timeout period according to your requirements.

answered Jul 2, 2013 at 5:38

Anish V

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1 Comment

DerpyNerd Over a year ago

Most reasonable answer I've found so far. Working with ajax toolkit and a tabcontainer often leads to an empty tab when ready is fired. A timeout of 50ms did the trick for me and is almost unnoticeable!

coder · Accepted Answer · 2012-04-10 16:23:55Z

0

codebehind:

  System.Web.UI.ScriptManager.RegisterClientScriptBlock(Page, GetType(Page), "Script", "showMessage();", True)

JS:

<script type="text/javascript" charset="utf-8">
 $(document).ready(function () {
 function showMessage() {
 alert("Hello!");
 }
 });
</script>

answered Apr 10, 2012 at 16:23

coder

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Comments

jdnichollsc · Accepted Answer · 2012-09-02 05:56:27Z

0

Renderer Blocks!

    <html>
         <head>
              // <%= GetScripts() %>        here!
         </head>
         <body>
              // <%= GetScripts() %>        or here!
         </body>
    </html>

in .cs

    public string GetScripts()   
     {
          string exit="<script type='text/javascript' language='javascript'> $( function(){";
          exit+= ""; //here!
          return exit + "});</script>";
     }

answered Sep 2, 2012 at 5:56

jdnichollsc

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