protected void btnSave_Click(object sender, EventArgs e)
{
using (DefaultConnection db = new DefaultConnection())
{
Student stu = new Student();
Int32 StudentID = 0;
if (!String.IsNullOrEmpty(Request.QueryString["StudentID"]))
{
StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
stu = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
}
stu.LastName = txtLastName.Text;
stu.FirstMidName = txtFirstName.Text;
stu.EnrollmentDate = Convert.ToDateTime(txtDate.Text);
if (StudentID == 0)
{
db.Students.Add(stu);
}
db.SaveChanges();
Response.Redirect("students.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect db
using (DefaultConnection db = new DefaultConnection())
{
//create a new department in memory
Student stud = new Student();
Int32 StudentID = 0;
//check for a url
if (!String.IsNullOrEmpty(Request.QueryString["StudentID"]))
{
//get id from the url
StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
//look up the student
stud = (from d in db.Students n
where d.StudentID == StudentID
select d).FirstOrDefault();
}
//fill properties of the new student
stud.FirstMidName = txtFirstName.Text;
stud.LastName = txtLastName.Text;
stud.EnrollmentDate = Convert.ToDateTime(txtEnrollDate.Text);
//add if we have no id in the url
if (StudentID == 0)
{
db.Students.Add(stud);
}
//save new student
db.SaveChanges();
//redirect to student list page
Response.Redirect("students.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//use EF to connect to SQL Server
using (DefaultConnection db = new DefaultConnection())
{
//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 to the updated students page
Response.Redirect("students.aspx");
}
}
