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.

Before dealing with error, So simply posting to this url sends emails? User must not have direct access to this — Ashkan Mobayen Khiabani
– Ashkan Mobayen Khiabani, Commented Oct 1, 2017 at 6:53

Salah Akbari · Accepted Answer · 2017-10-01 16:46:01Z

3

In .asmx file, your method should not be static if you want to use it across several pages. So just remove the static keyword and then it should works fine:

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

edited Oct 1, 2017 at 16:46

answered Oct 1, 2017 at 7:01

Salah Akbari

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