protected void btnSave_Click(object sender, EventArgs e) { try { //use EG to connect to SQL Server using (comp2007Entities db = new comp2007Entities()) { //use the Student model to save the new record Student s = new Student(); Int32 StudentID = 0; //check the querystring for an id so we can determine add/update if (Request.QueryString["StudentID"] != null) { //get the id from the url StudentID = Convert.ToInt32(Request.QueryString["StudentID"]); //get the current student from EF s = (from objs in db.Students where objs.StudentID == StudentID select objs).FirstOrDefault(); } s.LastName = txtLastName.Text; s.FirstMidName = txtFirstMidName.Text; s.EnrollmentDate = Convert.ToDateTime(txtEnrollmentDate.Text); //call add only if we have no student ID if (StudentID == 0) { db.Students.Add(s); } //run the update or insert db.SaveChanges(); //redirect Response.Redirect("students.aspx"); } } catch (Exception err) { Server.Transfer("/error.aspx"); } }
protected void btnSave_Click(object sender, EventArgs e) { try { //use EG to connect to SQL Server using (comp2007Entities db = new comp2007Entities()) { //use the Student Model to save the new record //check the querystring for an id so we can determine add/update if (Request.QueryString["DepartmentID"] != null) { //get the id from the url DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]); //get the current student from EF s = (from objs in db.Departments where objs.DepartmentID == DepartmentID select objs).FirstOrDefault(); } s.Name = txtDepartmentName.Text; s.Budget = Convert.ToDecimal(txtBudget.Text); //call add only if we have no student ID if (DepartmentID == 0) { db.Departments.Add(s); } db.SaveChanges(); //redirect Response.Redirect("departments.aspx"); } } catch (Exception err) { Server.Transfer("/error.aspx"); } }
protected void grdCourses_RowDeleting(object sender, GridViewDeleteEventArgs e) { //get selected record id Int32 EnrollmentID = Convert.ToInt32(grdCourses.DataKeys[e.RowIndex].Values["EnrollmentID"]); try { using (comp2007Entities db = new comp2007Entities()) { //get selected record Enrollment objE = (from en in db.Enrollments where en.EnrollmentID == EnrollmentID select en).FirstOrDefault(); //delete db.Enrollments.Remove(objE); db.SaveChanges(); //refresh the data on the page GetDepartments(); } } catch (Exception err) { Server.Transfer("/error.aspx"); } }
protected void grdCourses_RowDeleting(object sender, GridViewDeleteEventArgs e) { //store which row was clicked Int32 selectedRow = e.RowIndex; //get the selected StudentID using the grid's Data Key collection Int32 CourseID = Convert.ToInt32(grdCourses.DataKeys[selectedRow].Values["CourseID"]); try { //use EF to remove the selected student from the db using (comp2007Entities db = new comp2007Entities()) { Course s = (from objs in db.Courses where objs.CourseID == CourseID select objs).FirstOrDefault(); //do the delete db.Courses.Remove(s); db.SaveChanges(); } //refresh the grid GetCourses(); } catch (Exception err) { Server.Transfer("/error.aspx"); } }