calling ASP function from javascript

Question

hello i have this question i was trying to find a way to call a javascript function from asp controllers and i did here is the code :

    <script type="text/javascript">
      function hello() { 
        alert("hello world")
    }
</script>
<  /head>
 <body>
<form id="form1" runat="server">
<div>
    <asp:Button ID="buttonme" runat="server" OnClientClick="javascript:hello()" 
 Text="click" />

now lets say i have this code behind function

    Public Sub msg()
      MsgBox("hello world")
    End Sub

and i want to call it from a javascript function so it will be like controller----call---> javascript ---call--->code behind

is there is a way to do this

since this is a web app, when the MsgBox is fired, it will only popup a box on your server, it will not popup a box on the client. You will need to use ajax in order to use code-behind files for functions. — solidau
– solidau, Commented Jun 14, 2012 at 19:03
@Juventus18 thanks for your reply this is just an example it can do any thing — Mina Gabriel
– Mina Gabriel, Commented Jun 14, 2012 at 19:08
Take a look at his answer: stackoverflow.com/q/10893954/1268570 this is an alternative using Rest services (without .svc files) — Jupaol
– Jupaol, Commented Jun 14, 2012 at 19:14

Jf Beaulac · Accepted Answer · 2012-06-14 19:03:10Z

4

Define your method in a class somewhere in your web application.

[System.Web.Services.WebMethod]
public static string Msg()
{
     return "Hello world";
}

Add a script manager with EnablePageMethods=true in your aspx page

<asp:ScriptManager ID="someId" runat="server" EnablePageMethods="true">
</asp:ScriptManager>

Call the method in javascript

<script language="javascript" type="text/javascript">
    PageMethods.Msg(onSuccess);
    function onSuccess(response)
    {
        alert(response);
    }
</script>

answered Jun 14, 2012 at 19:03

Jf Beaulac

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Comments

bluevector · Accepted Answer · 2012-06-14 18:57:14Z

0

You must use AJAX in some form and expose the ASP.NET method you want to call via HTTP.

answered Jun 14, 2012 at 18:57

bluevector

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8 Comments

Mina Gabriel Over a year ago

is there is any other way to do this with out ajax

bluevector Over a year ago

Not really, no. If you want the browser-side code to call server-side code the communication mechanism is via AJAX (the XMLHttpRequest object). What's wrong with using AJAX? jQuery makes it quite easy to do.

Mina Gabriel Over a year ago

i know it isn't hard , what i have is a linkbutton that calls a javascript function to open a new tab in my project but before opening this tab i need to update a session , so my problem know is to update this session before opening the new tab

bluevector Over a year ago

Update the ASP.NET Session? Any HTTP request back to the server from the browser will do that. Is the content in your pop-up served from your application?

Mina Gabriel Over a year ago

considering this OnClientClick="var url = 'CIP_frmCIPEventExplorePdf.aspx?ViewPDF=1&intCIPEventID=' + $('#intCIPEventID').val();parent.showNewTab(url, 'CIP Chart - PDF', 'CIP');"> i want this control to go to a code behind function update the session "" and then "" open the new page , this new page generat a pdf file with the old session if you reload the page you get the updated data

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