Authentication failed - System.InvalidOperationException

Question

I'm trying to make simple Ajax request with following code in main.js file:

$.ajax({
    type: "POST",
    url: "SaveStyles.aspx/GetDate",
    data: { someParameter: "some value" },
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (msg) {
        console.log(msg);
    }
});

In C# in SaveStyles.aspx.cs I have method:

[WebMethod]
public static string GetDate(string someParameter)
{
    return "Sup!";
}

But in JS console I see error saying that authentication is failed with System.InvalidOperationException . I have no idea why it's happening. Mabye I shoud add something like anti-csrf token?

Answer 1

Resolved by setting AutoDirectMode to Off in App_Start/RouteConfig.cs

settings.AutoRedirectMode = RedirectMode.Off;

and adding a ScriptManager to the aspx page that has an EnablePageMethods set to 'true':

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