protected void btnSave_Click(object sender, EventArgs e)
{
//use EF 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 query string 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 Entity Framework
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);
db.SaveChanges();
//redirect to the updated students page
Response.Redirect("students.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");
}
}