private void courseAddButton_Click(object sender, EventArgs e) { addCourseObj = new AddCourseClass(); addCourseObj.CourseNo = courseNoTextBox.Text; addCourseObj.CourseName = courseNameTextBox.Text; addCourseObj.DeptName = dNameComboBox.Text; addCourseObj.Year = yearComboBox.Text; addCourseObj.Semester = semesterComboBox.Text; if (courseNoTextBox.Text == "" || courseNameTextBox.Text == "" || dNameComboBox.Text == "" || yearComboBox.Text == "" || semesterComboBox.Text == "") { MessageBox.Show("Please Fill-Up all field!!!"); this.Update(); } else { ob = new Gateway(); if (ob.InserIntoCourseInfoTable(addCourseObj) == 1) { MessageBox.Show("Information Added Successfully!!"); courseResetButton_Click(sender, e); } else { MessageBox.Show("Already Added this course."); } } }