protected void btnSave_Click(object sender, EventArgs e) { //connect using (DefaultConnection conn = new DefaultConnection()) { //instantiate a new student object in memory Course c = new Course(); //decide if updating or adding, then save if (!String.IsNullOrEmpty(Request.QueryString["CourseID"])) { Int32 CourseID = Convert.ToInt32(Request.QueryString["CourseID"]); c = (from crs in conn.Courses where crs.CourseID == CourseID select crs).FirstOrDefault(); } //fill the properties of our object from the form inputs c.Title = txtTitle.Text; c.Credits = Convert.ToInt32(txtCredits.Text); c.DepartmentID = Convert.ToInt32(ddlDepartment.SelectedValue); if (Request.QueryString.Count == 0) { conn.Courses.Add(c); } conn.SaveChanges(); //redirect to updated departments page Response.Redirect("Courses.aspx"); } }
protected void btnSave_Click(object sender, EventArgs e) { //connect using (DefaultConnection conn = new DefaultConnection()) { //instantiate a new deparment object in memory Department d = new Department(); //decide if updating or adding, then save if (Request.QueryString.Count > 0) { Int32 DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]); d = (from dep in conn.Departments where dep.DepartmentID == DepartmentID select dep).FirstOrDefault(); } //fill the properties of our object from the form inputs d.Name = txtName.Text; d.Budget = Convert.ToDecimal(txtBudget.Text); if (Request.QueryString.Count == 0) { conn.Departments.Add(d); } conn.SaveChanges(); //redirect to updated departments page Response.Redirect("departments.aspx"); } }
protected void btnSave_Click(object sender, EventArgs e) { //connect using (DefaultConnection conn = new DefaultConnection()) { //instantiate a new student object in memory Student s = new Student(); //decide if updating or adding, then save if (Request.QueryString.Count > 0) { Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]); s = (from stu in conn.Students where stu.StudentID == StudentID select stu).FirstOrDefault(); } //fill the properties of our object from the form inputs s.FirstMidName = txtFirstName.Text; s.LastName = txtLastName.Text; s.EnrollmentDate = Convert.ToDateTime(txtEnrollDate.Text); if (Request.QueryString.Count == 0) { conn.Students.Add(s); } conn.SaveChanges(); //redirect to updated departments page Response.Redirect("students.aspx"); } }
protected void btnAdd_Click(object sender, EventArgs e) { using (DefaultConnection conn = new DefaultConnection()) { Int32 StudentID = Convert.ToInt32(ddlStudent.SelectedValue); Int32 CourseID = Convert.ToInt32(Request.QueryString["CourseID"]); Enrollment objE = new Enrollment(); objE.StudentID = StudentID; objE.CourseID = CourseID; conn.Enrollments.Add(objE); conn.SaveChanges(); //refresh GetStudents(); } }
protected void grdDepCourses_RowDeleting(object sender, GridViewDeleteEventArgs e) { //get the selected Course id Int32 CourseID = Convert.ToInt32(grdDepCourses.DataKeys[e.RowIndex].Values["CourseID"]); using (DefaultConnection conn = new DefaultConnection()) { Course objC = (from c in conn.Courses where c.CourseID == CourseID select c).FirstOrDefault(); conn.Courses.Remove(objC); conn.SaveChanges(); GetDepartment(); } }
protected void grdDepartments_RowDeleting(object sender, GridViewDeleteEventArgs e) { //connect using (DefaultConnection conn = new DefaultConnection()) { //get the selected department id Int32 DepartmentID = Convert.ToInt32(grdDepartments.DataKeys[e.RowIndex].Values["DepartmentID"]); var d = (from dep in conn.Departments where dep.DepartmentID == DepartmentID select dep).FirstOrDefault(); //delete conn.Departments.Remove(d); conn.SaveChanges(); //update the grid GetDepartments(); } }
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e) { //connect using (DefaultConnection conn = new DefaultConnection()) { //get the selected department id Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]); var s = (from stu in conn.Students where stu.StudentID == StudentID select stu).FirstOrDefault(); //delete conn.Students.Remove(s); conn.SaveChanges(); //update the grid GetStudents(); } }
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e) { //get the selected enrollment id Int32 EnrollmentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["EnrollmentID"]); using (DefaultConnection conn = new DefaultConnection()) { Enrollment objE = (from en in conn.Enrollments where en.EnrollmentID == EnrollmentID select en).FirstOrDefault(); conn.Enrollments.Remove(objE); conn.SaveChanges(); GetStudents(); } }