How to use JavaScript in ASP.Net

Question

0.00/5 (No votes)

See more:

I m javascript learner and i hv written following code to Show DialogBox on a button click. but it gives error. please help.....
Error :- Error 1 'ASP.default_aspx' does not contain a definition for 'LoadJScript' and no extension method 'LoadJScript' accepting a first argument of type 'ASP.default_aspx' could be found (are you missing a using directive or an assembly reference?)

XML

<head runat="server">
    <title>Demo Page for Test</title>
    <script language="javascript" type="text/javascript" >
    function LoadJScript()
    {
        // document.getElementById("label1").
        var name = prompt("Enter Your Name Here",MERAZ);
    }
    </script>
</head>

ASP.NET

<body> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="LoadJScript()" /></body>

Posted 28-Jul-13 23:52pm

Member 9822231

Updated 29-Jul-13 2:07am

Joezer BH

v4

Add a Solution

Comments

Dholakiya Ankit 29-Jul-13 6:05am

6 solutions

Solution 4

I think you should also try this one..
write this in head :

XML

<script language="javascript" type="text/javascript">
        function LoadJScript() {


            var message = "Enter Your Name Here";

            alert(message);
        }
    </script>

and write this in body :

C#

<input type="button" onclick="LoadJScript()" value="Click" />

Posted 29-Jul-13 0:17am

Member 10361505

Updated 29-Jul-13 0:37am

v2

Solution 5

Simply replace your onClick with onClientClick... and problem will be solved... :)

Posted 29-Jul-13 0:21am

VICK

Comments

Joezer BH 29-Jul-13 8:08am

5ed

VICK 30-Jul-13 0:31am

thnx

Solution 2

Using the following line to add ur code:

HTML

<input type="button"  önclick="LoadJScript()" value="Click" />

Posted 29-Jul-13 0:05am

Rajan from Thiruvananthapuram

Updated 29-Jul-13 2:09am

v3

Solution 7

If you want to use onClick have to use return key word. Once your java script return true it will go for server side click event.

C#

<asp:button id="Button1" runat="server" text="Button" onClick="return LoadJScript();" xmlns:asp="#unknown" />


<script language="javascript" type="text/javascript" >
    function LoadJScript()
    {
       var name = prompt("Enter Your Name Here","MERAZ");
       if(name!=null)
       { 
          //your logic here
          return true;
       }
       else
       {
         //your logic here
         return false;
       }       
    }
</script>

Posted 29-Jul-13 0:35am

NAGARAJ N MACHAKNUR

Updated 29-Jul-13 2:06am

v3

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

kishore sharma · Accepted Answer · 2013-07-29T00:04:00

Solution 1

search where all you are using this method name "LoadJScript"

I believe somewhere in server control you are using this method.
if i am not wrong check if you are calling this method on onclick event of server control and passing one parameter,
to check search (Cntr+f) this method name, and use ClientClick property instead onClick to call javascript method.

Hope this helps you

Posted 29-Jul-13 0:04am

kishore sharma

Comments

Ankur^\m/ 29-Jul-13 6:14am

5!

[no name] 29-Jul-13 7:00am

THANKS! ACCORDING TO UR SUGGESTION I USE OnClientClick EVENT AND REMOVED runat="server" property
now it works properly.

kishore sharma 29-Jul-13 7:40am

welcome always

Thomas Daniels · Accepted Answer · 2013-07-29T00:06:00

Solution 3

Try OnClientClick instead of OnClick:

ASP.NET

<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="LoadJScript()" />

Posted 29-Jul-13 0:06am

Thomas Daniels

Comments

Ankur^\m/ 29-Jul-13 6:13am

He just edited his code to add how he was calling the function in the button. And I was wondering why this html code would give an error.
Btw 5 to you!

Thomas Daniels 29-Jul-13 6:16am

Thank you!

[no name] 29-Jul-13 7:01am

THANKS! ACCORDING TO UR SUGGESTION I USE OnClientClick EVENT AND REMOVED runat="server" property
now it works properly.

Thomas Daniels 29-Jul-13 7:43am

You're welcome!

Joezer BH 29-Jul-13 8:07am

5ed

Thomas Daniels 29-Jul-13 8:08am

Thank you!