Unknown web method. Parameter name: methodName in web services

Question

I am using web services in asp.net with c#. In that I am working in one task that is to call the method from ajax in web services. But whenever I call the method from ajax in button click event at that time it shows the error i.e. 500 (internal server error) and when I am go the network in developer tools it shows me Unknown web method and method. Parameter name : methodname.

Here is the ajax function code

$("#submit").click(function () {

     $.ajax({

         type: "POST",

         url: "OakscrollWebService.asmx/SendMail",

         dataType: "json",

         data: JSON.stringify({ name: $('#name').val(), email: $('#mail').val(), subject: $('#subject').val(), message: $('#message').val() }),

         contentType: "application/json; charset=utf-8",

         success: function (data) {

             alert(data.d);

         },

         failure: function (data) {

             alert("something went wrong");

             //console.log(msg);

         }

     });

 });

and here is the cs code

[WebMethod, ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = false)]

public static void SendMail(string name, string email, string subject, string message)

{

}

I have noticed one more thing that is sendmail method is not showing in asmx file when I am run that file. Surprised that why it is not coming.

Please help to solve this issue.

Thanks.

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Answer 1

In .asmx file, your method should not be static if you want to use it across several pages:

[WebMethod, ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = false)]
public void SendMail(string name, string email, string subject, string message)
{
}

Unknown web method. Parameter name: methodName in web services

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