protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (ContosoEntities conn = new ContosoEntities())
{
//instantiate a new deparment object in memory
Cours c = new Cours();
//decide if updating or adding, then save
if (!String.IsNullOrEmpty(Request.QueryString["CourseID"]))
{
Int32 CourseID = Convert.ToInt32(Request.QueryString["CourseID"]);
c = (from cour in conn.Courses
where cour.CourseID == CourseID
select cour).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(ddlDepartments.SelectedValue);
if (String.IsNullOrEmpty(Request.QueryString["CourseID"]))
{
conn.Courses.Add(c);
}
conn.SaveChanges();
//redirect to updated departments page
Response.Redirect("courses.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (ContosoEntities conn = new ContosoEntities())
{
//instantiate a new deparment object in memory
Department d = new Department();
//decide if updating or adding, then save
if (Request.QueryString.Count > 0)
{
Int32 DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
d = (from dep in conn.Departments
where dep.DepartmentID == DepartmentID
select dep).FirstOrDefault();
}
//fill the properties of our object from the form inputs
d.Name = txtName.Text;
d.Budget = Convert.ToDecimal(txtBudget.Text);
if (Request.QueryString.Count == 0)
{
conn.Departments.Add(d);
}
conn.SaveChanges();
//redirect to updated departments page
Response.Redirect("departments.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (ContosoEntities conn = new ContosoEntities())
{
Student s = new Student();
if (Request.QueryString["StudentID"] != null)
{
Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
s = (from stu in conn.Students where stu.StudentID == StudentID select stu).FirstOrDefault();
}
s.FirstMidName = txtFirstName.Text;
s.LastName = txtLastName.Text;
s.EnrollmentDate = Convert.ToDateTime(txtEnrollmentDate.Text);
if (Request.QueryString.Count == 0)
{
conn.Students.Add(s);
}
conn.SaveChanges();
Response.Redirect("students.aspx");
}
}
protected void btnAdd_Click(object sender, EventArgs e)
{
using (ContosoEntities conn = new ContosoEntities())
{
Int32 CourseID = Convert.ToInt32(Request.QueryString["CourseID"]);
Int32 StudentID = Convert.ToInt32(ddlStudent.SelectedValue);
Enrollment objE = new Enrollment();
objE.StudentID = StudentID;
objE.CourseID = CourseID;
conn.Enrollments.Add(objE);
conn.SaveChanges();
GetCourse();
}
}
protected void grdCourses_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
Int32 CourseID = Convert.ToInt32(grdCourses.DataKeys[e.RowIndex].Values["CourseID"]);
using (ContosoEntities db = new ContosoEntities())
{
Cours objE = (from c in db.Courses
where c.CourseID == CourseID
select c).FirstOrDefault();
//process the deletion
db.Courses.Remove(objE);
db.SaveChanges();
//repopulate the page
GetDepartment();
}
}
protected void grdDepartments_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//connect
using (ContosoEntities conn = new ContosoEntities())
{
//get the selected DepartmentID
Int32 DepartmentID = Convert.ToInt32(grdDepartments.DataKeys[e.RowIndex].Values["DepartmentID"]);
var d = (from dep in conn.Departments
where dep.DepartmentID == DepartmentID
select dep).FirstOrDefault();
//process the delete
conn.Departments.Remove(d);
conn.SaveChanges();
//update the grid
GetDepartments();
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//connect
using (ContosoEntities conn = new ContosoEntities())
{
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
var s = (from stu in conn.Students where stu.StudentID == StudentID select stu).FirstOrDefault();
conn.Students.Remove(s);
conn.SaveChanges();
GetStudents();
}
}
protected void grdCourses_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//get the selected EnrollmentID
Int32 EnrollmentID = Convert.ToInt32(grdCourses.DataKeys[e.RowIndex].Values["EnrollmentID"]);
using (ContosoEntities db = new ContosoEntities())
{
Enrollment objE = (from en in db.Enrollments
where en.EnrollmentID == EnrollmentID
select en).FirstOrDefault();
//process the deletion
db.Enrollments.Remove(objE);
db.SaveChanges();
//repopulate the page
GetStudent();
}
}