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
Course c = new Course();
Int32 CourseID = 0;
//check the query string for an id so we can determine add / update
if (Request.QueryString["CourseID"] != null)
{
//get the ID from the URL
CourseID = Convert.ToInt32(Request.QueryString["CourseID"]);
//get the current student from Entity Framework
c = (from objS in db.Courses
where objS.CourseID == CourseID
select objS).FirstOrDefault();
}
c.Title= txtTitle.Text;
c.Credits = Convert.ToInt32(txtCredits.Text);
c.DepartmentID = Convert.ToInt32(ddDepartment.SelectedValue);
//call add only if we have no student ID
if (CourseID == 0)
db.Courses.Add(c);
db.SaveChanges();
//redirect to the updated students page
Response.Redirect("courses.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (DefaultConnection conn = new DefaultConnection())
{
//instantiate a new student object in memory
Course c = new Course();
//decide if updating or adding, then save
if (!String.IsNullOrEmpty(Request.QueryString["CourseID"]))
{
Int32 CourseID = Convert.ToInt32(Request.QueryString["CourseID"]);
c = (from crs in conn.Courses
where crs.CourseID == CourseID
select crs).FirstOrDefault();
}
//fill the properties of our object from the form inputs
c.Title = txtTitle.Text;
c.Credits = Convert.ToInt32(txtCredits.Text);
c.DepartmentID = Convert.ToInt32(ddlDepartment.SelectedValue);
if (Request.QueryString.Count == 0)
{
conn.Courses.Add(c);
}
conn.SaveChanges();
//redirect to updated departments page
Response.Redirect("Courses.aspx");
}
}
