ASP.NET AJAX Networking and Web Services

Urgent: Scandalous Error: Servermethod "MyMethod" failed

SaraDob — Wed, 08 Jul 2009 21:39:27 GMT

Sorry for getting Back this late.Was caught with other Issues.

Well, thanks for Suggesting me to look into eventLog mrmercury.

I checked everything on Code Side.Everything is working fine.
I got to See the Application Log in the event Viewer.Here is what i found:

I'm using Master Pages. Page B.aspx has the textbox control,Javascript and web method in it.

I have A.aspx, which has some information.After the User Selects this info, i Server.transfer to B.aspx.

So when the webmethod on B.aspx is trying to Display the message, it is seraching for A.aspx.
I don't know y this is happening.

Please help me to correct this.

Re: Scandalous Error: Servermethod "MyMethod" failed

mrmercury — Thu, 02 Jul 2009 23:26:20 GMT

You are already catching them since you are using the try-catch blocks, now you need to send them to the log in the catch block, there are several way s of doing this: you could use your own log system, or you could use Window’s event logs, this way the system administrator will be able to check the logs in the case of a problem with your WebService and use the information to solve the issue, for this you can use the System.Diagnostics.EventLog class, it’s really easy to use it check the .NET documentation for an example, you can use the Window’s Event Viewer to examine the logs, note that you should be able to create new logs in your development machine, but you’ll need to register the application with the Event Viewer to be able to create logs in the server using theEventLog’s CreateEventSource() method.

Re: Scandalous Error: Servermethod "MyMethod" failed

SaraDob — Thu, 02 Jul 2009 21:03:18 GMT

Since i'm anewbie, i'm trying to understand these concepts.Can ypu please let me know how to catch this exceptions?

Please

Re: Scandalous Error: Servermethod "MyMethod" failed

mrmercury — Thu, 02 Jul 2009 17:15:16 GMT

It looks like the problem is in the CheckCustomerInDatabase method since it seems to work part of the time, and since you as the programmer are responsible for what goes wrong with your WebService you should always log the exceptions that get thrown inside the WebMethod, this way you’ll be able to see what’s going on.

Re: Scandalous Error: Servermethod "MyMethod" failed

SaraDob — Thu, 02 Jul 2009 15:53:28 GMT

Thanks for your reply..(Sorry for the delay in my reply).

The javascript is being called.I think i get the error when the page methods are being called.

Anything else?

Re: Scandalous Error: Servermethod "MyMethod" failed

akhhttar — Tue, 30 Jun 2009 16:10:17 GMT

Hi,

Did you try to debug Javascript and Server Side code? Where does this errror actually happen? Did request reach at server or not?

Thanks

Muhammad Akhtar Shiekh

Scandalous Error: Servermethod "MyMethod" failed

SaraDob — Tue, 30 Jun 2009 13:48:58 GMT

Hi,

I have going around this error for a while now.Now i realised , there is nothing wrong with my code.can you please help me realise , Why the erros is being thrown?

I'm calling a javascript function ( on textchanged on text box).In that javascript, i have Used Pagemethods to call a server side function(in Code behind) to check ,if the Customer entered is in database or not?

I have used

1) Script manager and enabled page methods
2) I have declared the server side method with

<System.Web.Services.WebMethod()> _

The roor throws up if i enter anything in the textbox: The Server Method"CheckCust" failed. everytime. But few time, it does not. it works correctly. I don't know under what circumstances, the error is throwing up.

I will paste my code below.PLEASE HELP ME in solving this scandulous error.

Thanks.

'''Server Side function:

<System.Web.Services.WebMethod()> _

Public Shared Function CheckCustomerInDatabase(ByVal Custname As String) As String

Dim MyConn As SqlConnection = New SqlConnection(System.Configuration.ConfigurationManager.AppSettings("StrConn"))If Not (Custname Is Nothing OrElse Custname.Length = 0) Then

If MyConn.State = ConnectionState.Closed Then

MyConn.Open()

End If

If MyConn.State = ConnectionState.Open Then

Try

Dim StrCheckCustomer As String

StrCheckCustomer =

String.Format("Select CompanyName From Customers where Companyname='{0}'", Custname)Dim CmdCheckCustomer As SqlCommand = New SqlCommand(StrCheckCustomer, MyConn)Dim CustExist As String = Convert.ToString(CmdCheckCustomer.ExecuteScalar())If CustExist Is String.Empty Then

Return ("This Customer does not exist in database.To add this Customer,Click on the Icon next the textbox and add customer into Database and then choose it :" & Custname)Else

Return Nothing

End If

Catch ex As SqlExceptionReturn "error"

Finally

MyConn.Close()

End Try

End If

End Function

===Javascript

function

{

CheckCustomerTextBox=document.getElementById(id);

CheckCustomer=CheckCustomerTextBox.value;

PageMethods.CheckCustomerInDatabase(CheckCustomer,CallSuccess,CallFailed);

}

{

alert(result);

}

CheckCustInDB(id)var CheckCustomerTextBox;var CheckCustomer;function CallSuccess(result)if(result!=null)

function

{

alert(error.get_message());

}

CallFailed(error)

}

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

</asp:ScriptManager>