<HttpPost()>
    Function WFUserEdited(ByVal userdetails As userdetails) As ActionResult
            Return View()
    End Function

Public Class userdetails
    Public Property Username As String
    Public Property Password As String
    Public Property Fullname As String
    Public Property Location As String
    Public Property Appcode As String
    Public Property Userlevel As String
End Class

$("#btnSubmit").click(function () {
                var q = validate();
                if (q = true) {
                    var userdetails = {};
                    userdetails.UserName = $('#txtusername').val().toString();
                    userdetails.Password = $('#txtPassword').val().toString();
                    userdetails.Fullname = $('#txtfullName').val().toString();
                    userdetails.Location = $('#txt_location').val().toString();
                    userdetails.Appcode = $("#drp_appcode").chosen().val().toString();
                    userdetails.Userlevel = $("#drp_userlevel").chosen().val().toString();
                    userdetails = JSON.stringify(userdetails);
                    var url = '@Url.Action("WFUserEdited", "WFUser")';

                    $.ajax({
                        url: url,
                        type: 'POST',
                        traditional: false,
                        contentType: "application/json; charset=utf-8",
                        dataType: 'json',
                        data: { "userdetails": userdetails },
                        success: function (data) {
                        },
                        error: function (data) {
                        }
                    });
                }
            });
        });

Protected Overrides Function BeginExecuteCore(callback As AsyncCallback, state As Object) As IAsyncResult
        Try
            ViewBag.UserImage = "http://_layouts/15/CaptarisWFTasksWebPart/EmployeeImages/sree.jpg"

        Catch generatedExceptionName As Exception
            Return MyBase.BeginExecuteCore(callback, state)
        End Try
        Return MyBase.BeginExecuteCore(callback, state)
    End Function