public string Put(tblTestDepartment dep)
        {
            try
            {
                DataTable table = new DataTable();
                string    query = @"
                   UPDATE tblTestDepartment SET DepartmentName = '" + dep.DepartmentName + "' WHERE DepartmentID =" + dep.DepartmentID;

                using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["EmployeeAppDB"].ConnectionString))
                    using (var cmd = new SqlCommand(query, con))
                        using (var da = new SqlDataAdapter(cmd))
                        {
                            cmd.CommandType = CommandType.Text;
                            da.Fill(table);
                        }

                return("update Successfully");
            }
            catch (Exception ex)
            {
                HttpResponseMessage httpResponseMessage = new HttpResponseMessage(HttpStatusCode.BadRequest);
                httpResponseMessage.Content = new StringContent(ex.Message);
                throw new HttpResponseException(httpResponseMessage);

                //return "update failed";
            }
        }
        public string POST(tblTestDepartment dep)
        {
            try
            {
                DataTable table = new DataTable();
                string    query = @"
                   insert into tblTestDepartment values ('" + dep.DepartmentName + "')";

                using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["EmployeeAppDB"].ConnectionString))
                    using (var cmd = new SqlCommand(query, con))
                        using (var da = new SqlDataAdapter(cmd))
                        {
                            cmd.CommandType = CommandType.Text;
                            da.Fill(table);
                        }

                return("Added Successfully");
            }
            catch (Exception)
            {
                return("failed Add");
            }
        }