protected void btnSave_Click(object sender, EventArgs e)
{
//use EF to connect to SQL Server
using (comp2007Entities db = new comp2007Entities())
{
Course objC = new Course();
if (!String.IsNullOrEmpty(Request.QueryString["CourseID"]))
{
Int32 CourseID = Convert.ToInt32(Request.QueryString["CourseID"]);
objC = (from c in db.Courses
where c.CourseID == CourseID
select c).FirstOrDefault();
}
//populate the course from the input form
objC.Title = txtTitle.Text;
objC.Credits = Convert.ToInt32(txtCredits.Text);
objC.DepartmentID = Convert.ToInt32(ddlDepartment.SelectedValue);
if (String.IsNullOrEmpty(Request.QueryString["CourseID"]))
{
//add
db.Courses.Add(objC);
}
//save and redirect
db.SaveChanges();
Response.Redirect("courses.aspx");
}
}
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
Department d = new Department();
d.Name = txtDeptName.Text;
d.Budget = Convert.ToDecimal(txtBudget.Text);
db.Departments.Add(d);
db.SaveChanges();
//redirect to the updated students page
Response.Redirect("departments.aspx");
}
}
protected void grdcourses_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//get selected course ID
Int32 CourseID = Convert.ToInt32(grdcourses.DataKeys[e.RowIndex].Values["CourseID"]);
using (comp2007Entities db = new comp2007Entities())
{
//get selected course
Course objC = (from c in db.Courses
where c.CourseID == CourseID
select c).FirstOrDefault();
//delete
db.Courses.Remove(objC);
db.SaveChanges();
//refresh grid
GetDepartment();
}
}
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 query string
if (Request.QueryString["StudentID"] != null)
{
//Get url
StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
//Get Student
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);
if (StudentID == 0)
{
db.Students.Add(s);
}
db.SaveChanges();
//redirect to the updated students page
Response.Redirect("students.aspx");
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//get selected record id
Int32 EnrollmentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["EnrollmentID"]);
using (comp2007Entities db = new comp2007Entities())
{
//get selected record
Enrollment objE = (from en in db.Enrollments
where en.EnrollmentID == EnrollmentID
select en).FirstOrDefault();
//delete
db.Enrollments.Remove(objE);
db.SaveChanges();
//refresh the data on the page
GetCourse();
}
}
protected void grdDepartments_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//store which row was clicked
Int32 selectedRow = e.RowIndex;
//get the select student ID using the grids data key collection
Int32 DepartmentID = Convert.ToInt32(grdDepartments.DataKeys[selectedRow].Values["DepartmentID"]);
//connect to EF to remove student from db
using (comp2007Entities db = new comp2007Entities())
{
Department d = (from objs in db.Departments
where objs.DepartmentID == DepartmentID
select objs).FirstOrDefault();
//Delete
db.Departments.Remove(d);
db.SaveChanges();
}
// refresh the grid
GetDepartments();
}