protected void btnSave_Click(object sender, EventArgs e)
{
using (DefaultConnection db = new DefaultConnection())
{
Student stud = new Student();
if (!String.IsNullOrEmpty(Request.QueryString["StudentID"]))
{
Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
stud = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
}
stud.LastName = txtName.Text;
stud.FirstMidName = txtFirstName.Text;
stud.EnrollmentDate = Convert.ToDateTime(txtEnrollmentDate.Text);
// add the new department if no url
if (String.IsNullOrEmpty(Request.QueryString["StudentID"]))
{
db.Students.Add(stud);
db.SaveChanges();
}
// save new department
db.SaveChanges();
//redirect
Response.Redirect("students.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
// connect
using (DefaultConnection db = new DefaultConnection())
{
// create a new department in memory
Department dep = new Department();
//check for url
if (!String.IsNullOrEmpty(Request.QueryString["DepartmentID"]))
{
// get ud from url
Int32 DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
}
// fill the properties of the new department
dep.Name = txtName.Text;
dep.Budget = Convert.ToDecimal(txtBudget.Text);
// add the new department if no url
if (String.IsNullOrEmpty(Request.QueryString["DepartmentID"]))
{
db.Departments.Add(dep);
db.SaveChanges();
}
// save new department
db.SaveChanges();
//redirect
Response.Redirect("departments.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
using (DefaultConnection db = new DefaultConnection())
{
Course objc = new Course();
objc.Title = txtTitle.Text;
objc.Credits = Convert.ToInt32(txtCredits.Text);
objc.DepartmentID = Convert.ToInt32(ddlDepartments.SelectedValue);
db.Courses.Add(objc);
db.SaveChanges();
Response.Redirect("courses.aspx");
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
// identify the department id to be deleted from the row the user selected
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
//connect
using (DefaultConnection db = new DefaultConnection())
{
Student stud = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
// delete
db.Students.Remove(stud);
db.SaveChanges();
//refresh the grid
GetStudents();
}
}
