private void assignButton_Click(object sender, EventArgs e) { CourseAssignToTeacher courseAssignToTeacher = new CourseAssignToTeacher(); float remainingCredit; float.TryParse(remainingCreditTextBox.Text, out remainingCredit); float courseCredit; float.TryParse(creditTextBox.Text, out courseCredit); remainingCredit -= courseCredit; DialogResult result = DialogResult.None; if (remainingCredit <= 0) { string massageBoxString = "Teacher is Assigned more Credit\n" + "Do you want to continue"; string titleBarString = "Warning"; MessageBoxButtons messageBoxButtons = MessageBoxButtons.YesNo; MessageBoxIcon messageBoxIcon = MessageBoxIcon.Information; result = MessageBox.Show(massageBoxString, titleBarString, messageBoxButtons, messageBoxIcon); } if (result == DialogResult.No) { return; } // erokom return condition ta 1ta choto limited condtion. mane ei jaiga projonto ashle ei condition ta mante hobe // na hoi program break korbe courseAssignToTeacher.RemainingCredit = remainingCredit; int deptId; int.TryParse(hiddenDeptId.Text, out deptId); courseAssignToTeacher.DeptId = deptId; int teacherId; int.TryParse(hiddenTeacherId.Text, out teacherId); courseAssignToTeacher.TeacherId = teacherId; int courseId; int.TryParse(hiddenCourseId.Text, out courseId); courseAssignToTeacher.CourseId = courseId; if (courseAssignToTeacherManager.IsExistCourse(courseAssignToTeacher)) { MessageBox.Show(@"This Course already assign to a teacher"); return; } string massage = courseAssignToTeacherManager.SaveCourseAssignToTeacher(courseAssignToTeacher); MessageBox.Show(massage); }