?
Solved

Consume WebMethod  (code behind) using javascript / AJAX 1.0

Posted on 2007-12-01
2
Medium Priority
?
5,110 Views
Last Modified: 2008-02-01
Hi,

I have a web mithod in my code behind page (simplified):

    <System.Web.Services.WebMethodAttribute()> <System.Web.Script.Services.ScriptMethodAttribute()> _
    Public Shared Function GetDynamicContent(ByVal contextKey As System.String) As System.String
        Return System.Web.HttpContext.Current.Session("MessageCount")
    End Function

I want to be able to call the web method client side and put the result into a javascript var. I found a few examples of doing this with web services, but I want to be able to access the session and application variables. and I cant seem to get that info from a service.
0
Comment
Question by:bhermer
2 Comments
 
LVL 4

Accepted Solution

by:
bhermer earned 0 total points
ID: 20401557
Ok, I found the answer here, and once you know how it is very easy. So here it is for all of you who want to consume a page event as if it was a web service, and STILL have access to the Session Vars of your clients session:

On You Page: (Take note of EnablePageMethods !!!!!)

<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">

</asp:ScriptManager>
       
<script language="javascript" type="text/javascript">

<!--

// Javascript function


function GetLatestMessages(){
//  CALL THIS FUNCTION TO CALL THE CODE BEHIND METHOD, IF NEEDED YOU CAN SUPPLY ARGUEMENTS
    PageMethods.GetDynamicContent(OnCallComplete,OnCallError);
}

function OnCallComplete(result,txtresult,methodName)

{
// DO SOMETHING HERE, THE RESULT IS THE RETURN FROM THE METHOD
}


function OnCallError(error,userContext,methodName)
{
    if(error !== null) {
       alert(error.get_message());
    }

}




// -->

</script>

CODE BEHIND:

<System.Web.Services.WebMethodAttribute()> <System.Web.Script.Services.ScriptMethodAttribute()> _
        Public Shared Function GetDynamicContent() As System.String
     
        Return System.Web.HttpContext.Current.Session("HelloWorldSession")
    End Function
0
 
LVL 1

Expert Comment

by:Vee_Mod
ID: 20410851
Closed, 500 points refunded.
Vee_Mod
Community Support Moderator
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have developed many web applications with asp & asp.net and to add and use a dropdownlist was always a very simple task, but with the new asp.net, setting the value is a bit tricky and its not similar to the old traditional method. So in this a…
Sometimes in DotNetNuke module development you want to swap controls within the same module definition.  In doing this DNN (somewhat annoyingly) swaps the Skin and Container definitions to the default admin selections.  To get around this you need t…
Integration Management Part 2
Stellar Phoenix SQL Database Repair software easily fixes the suspect mode issue of SQL Server database. It is a simple process to bring the database from suspect mode to normal mode. Check out the video and fix the SQL database suspect mode problem.
Suggested Courses

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question