Web Service method name is not valid

Question

I get the following error \"Web Service method name is not valid\" when i try to call webmethod from javascript

System.InvalidOperationException: SaveBO

Answer 1

As Sundar Rajan states, check the parameters are also correct. My instance of this error was because I had failed to pass any parameters (as a body in a POST request) and the asmx web method was expecting a named parameter, because of this the binding logic failed to match up the request to the method name, even though the name itself is actually correct.

[WebMethod]
        public object MyWebMethod(object parameter)

If there is no parameter in the body of the request then you will get this error.