protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e) { //identify student id to manipulate Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]); //Select current id based upon selected row using (DefaultConnection db = new DefaultConnection()){ Student stdt = (from s in db.Students where s.StudentID == StudentID select s).FirstOrDefault(); db.Students.Remove(stdt); db.SaveChanges(); //refresh grid getStudents(); } }
protected void btnSave_Click(object sender, EventArgs e) { //connect to database using (DefaultConnection db = new DefaultConnection()) { //create new student in memory Student stdt = new Student(); Int32 StudentID = 0; DateTime EnDate = DateTime.Now; //handle updating a record if (!String.IsNullOrEmpty(Request.QueryString["StudentID"])) { StudentID = Convert.ToInt32(Request.QueryString["StudentID"]); stdt = (from s in db.Students where s.StudentID == StudentID select s).FirstOrDefault(); //set eroll date to equal existing result EnDate = stdt.EnrollmentDate; } //fill in student details stdt.FirstMidName = txtLName.Text; stdt.LastName = txtFName.Text; //add current date time as time of registering stdt.EnrollmentDate = EnDate; if (StudentID == 0) { //create new row in database db.Students.Add(stdt); } db.SaveChanges(); //redirect back to students page Response.Redirect("students.aspx"); } }
protected void grdDepartments_RowDeleting(object sender, GridViewDeleteEventArgs e) { //identify department id to be deleted from the row the user selected Int32 DepartmentID = Convert.ToInt32(grdDepartments.DataKeys[e.RowIndex].Values["DepartmentID"]); //connect to database using (DefaultConnection db = new DefaultConnection()) { //SElect current department based upon id Department dep = (from d in db.Departments where d.DepartmentID == DepartmentID select d).FirstOrDefault(); db.Departments.Remove(dep); db.SaveChanges(); //refresh the grid GetDepartments(); } }
protected void btnSave_Click(object sender, EventArgs e) { //connect using (DefaultConnection db = new DefaultConnection()) { //create a new department in memory Department dep = new Department(); Int32 DepartmentID = 0; //handle updating a recod if (!String.IsNullOrEmpty(Request.QueryString["DepartmentID"])) { DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]); dep = (from d in db.Departments where d.DepartmentID == DepartmentID select d).FirstOrDefault(); } //fill the properties of the department dep.Name = txtName.Text; dep.Budget = Convert.ToDecimal(txtbudget.Text); if (DepartmentID == 0) { //save the new department db.Departments.Add(dep); } db.SaveChanges(); //redirect to departments list page Response.Redirect("departments.aspx"); } }