Question

I’m developing a web application using .net/c#/jQuery.

I want to develop an AJAX function in a user register page to detect if the user name has been chosen by others already.

Since the register form is in a user control, and a scriptmanager control is in the master page, I added a ScriptManagerProxy control in that user control. The js function was wrapped into a file called a.js.

The webservice is called Vet.asmx. When called it always reports that “Vet” is undefined, but I don’t know why. The code of ScriptManagerProxy is:

<asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server">
    <Scripts>
        <asp:ScriptReference Path="~/Menu/a.js" />
    </Scripts>
    <Services>
        <asp:ServiceReference Path="~/WebService/Vet.asmx" />
    </Services>
</asp:ScriptManagerProxy>

The Vet.cs is

public Vet()
{

    //Uncomment the following line if using designed components 
    //InitializeComponent(); 
}

[WebMethod]
public string SearchUserName(string name)
{
    ...
}

My a.js code

jQuery("[id$='tb_UserName']").blur(function() {
    var login = jQuery("[id$='tb_UserName']").val();
    Vet.SearchUserName(login, SearchUserNameCallback);
});
function SearchUserNameCallback(result) {
    if (result == "Y") {
        jQuery('#userInfo').html("This user name has already been taken");
    } else {
        jQuery('#userInfo').html("Congratulations!You have a new user name.");
    }
}

I’m sure the web method and the js function have no issues other than it cannot find the “Vet” web service. Any idea?

Answer 1

Is your Vet class decorated with the [System.Web.Script.Services.ScriptService] attribute?