How to call apsx.cs mthod(C#) from javascript?

[abdunnabisk]

Any body has any idea on How to call apsx.cs mthod(C#) from javascript?

Thanks
Abdun Nabi Sk

[Mr Gray]

Depends what you are trying to achieve?

[abdunnabisk]

can u show me some examples?

thanks..
Abdun Nabi Sk

[Mr Gray]

This is the standard bit of JScript that is in an aspx page but generally you do not send javascript to interact with methods in the cs file:

<script type="text/javascript">
<!--
var theForm = document.forms['aspnetForm'];
if (!theForm) {
    theForm = document.aspnetForm;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}
// -->
</script>
 

[abdunnabisk]

actually I am having a method name

public void Check(int n)
{
}
 

in aspx.cs file.

in javascript

function Test(n)
{
  <%Check(n)%>;
}
 

its not calling Check() method....
There are errors like syntax

and if I dont want to send argument then no error but
every time i have to refresh the page...

can u help me

Thanks
Abdun Nabi SK

[Mr Gray]

In your case you should probably have a submit button that runs that code. In order to run cs code you need to post to the server to run that code.

So in the aspx page you should add an:

<asp:button id="btnSubmit" runat="server" Text="Submit" />
<asp:TextBox id="txtCheck" runat="server" />
 

In the cs file in the Initialise() method you can add the eventhandler for the button like so:

btnSubmit.Click += new EventHandler(Check);
 

Then in the Check() method you created you can access the text field like so:

public void Check(object s, EventArgs e)
{
    string strCheck = txtCheck.Text;
 
    // operate on strCheck here
}
 

Hope this example will help get you started.

[abdunnabisk]

I have button that is calling
javascrip:parent.Test(2)

method.....
anyway I have to call c# method from
javascript method Test().

please help me
thanks

Abdun Nabi Sk

[Frinavale]

I have button that is calling
javascrip:parent.Test(2)

method.....
anyway I have to call c# method from
javascript method Test().

please help me
thanks

Abdun Nabi Sk

You can't really use JavaScript for this.
You're going to have to use Ajax to call server side code.

Are you using Ajax in your web project currently?
If you use Ajax, the page is "partially" posted back to the server, your request is processed and that section of the page is updated.

You can use pure Ajax to do this if you want to, but .NET now has an Ajax framework that simplifies things.


Instead of putting in Ajax calls to do validation, you should consider using the client side Validator objects available to you (eg RequiredFieldValidator, RegularExpressionValidator ...etc).

You should still validate on the server....I would place a call to your Check() method in your button click event and if it return's true, would allow further processing to take place.

-Frinny

[antonmaju]

I'm agree with what Frinavale said.
But if you really want to do validation via js then you may use PageMethods with ASP.NET Ajax.