Asp.Net - Problem with ServiceReference of WCF Javascript call.

Question

4.50/5 (2 votes)

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Hi,

I am calling WCF function of my application from Javascript using asp:ServiceReference. I have declared ServiceReference in my Aspx page - "MyPage.aspx" as below.

ASP.NET

<asp:ScriptManager ID="ScriptManager1" runat="server">    
 <Scripts>
  <asp:ScriptReference Path="~/Scripts/script.js"/>
  <asp:ScriptReference Path="~/Scripts/jquery.js"/>
     
 </Scripts>        

 <Services>
  <asp:ServiceReference Path="~/Services/MyService.svc" />
        
 </Services>

</asp:ScriptManager>

I am calling WCF method MyWCFMethod in my Javascript as below.

JavaScript

function BeforeNavigate()
{
     var isConfirm = confirm("Do you want to Navigate?");
     if (isConfirm ) 
     {
       CCRClientService.MyWCFMethod(frmSuccess, frmFail, null);
       return false;
     }
}

function frmSuccessUnlock(result) { return true; }
function frmFail(result) { return false; }

Javascript function BeforeNavigate is called when user tries to navigate to other pages. When I come on "MyPage.aspx" and navigate to some other page after few seconds, my WCF method gets call successfully. But when navigate very quickly as soon as I come on "MyPage.aspx", then my WCF method does not get called.

Any idea why WCF method does not getting called when I navigate as soon as I come on "MyPage.aspx"?

Cheers
Rais

Posted 11-Sep-12 4:13am

RaisKazi

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Comments

Ashraff Ali Wahab 11-Sep-12 10:24am

Do you get any javascript error that CCRClientService is undefined?

RaisKazi 11-Sep-12 11:25am

Nope, no error. It simply navigates to other page without calling WCF method, when I click on other link. But if I wait for few seconds on the page and then navigate, it does call WCF method.

Ashraff Ali Wahab 11-Sep-12 12:37pm

where is the BeforeNavigate event attached to?
Its wierd that the webservice is not called with out any error.You tried firebug?

Nueman 11-Sep-12 10:25am

I do not have an answer for you, but I congratulate you on a well defined question. Good job.

RaisKazi 11-Sep-12 11:28am

Thank you Nueman. Its a strange issue. :)

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RaisKazi · Accepted Answer · 2012-09-11T08:50:00

Found Alternate solution to resolve this issue.

1) Set EnablePageMethods property of your ScriptManager to true.

ASP.NET

<asp:scriptmanager id="ScriptManager1" runat="server" enablepagemethods="true" xmlns:asp="#unknown">
</asp:scriptmanager>

2)Write a static method in code-behind(aspx.cs) and add System.Web.Services.WebMethod attribute to it.

C#

[System.Web.Services.WebMethod]
public static void MyWCFMethod()
{
  //Implementation 
}

3) And then call your WebMethod in Javascript as below.