protected void btnSave_Click(object sender, EventArgs e)
{
//do insert or update
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)
{
using (comp2007Entities db = new comp2007Entities())
{
//use the student model to save record
Student s = new Student();
Enrollment en = new Enrollment();
Int32 StudentID = 0;
//check query string for an id so we can determine add or update
if (Request.QueryString["StudentID"] != null)
{
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 = txtFirstName.Text;
s.EnrollmentDate = Convert.ToDateTime(txtEnrollmentDate.Text);
//add only if student has no ID
if (StudentID == 0)
{
//redirect to updated table of students
db.Students.Add(s);
}
db.SaveChanges();
Response.Redirect("students.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
using (comp2007Entities db = new comp2007Entities())
{
//use the student model to save record
Department d = new Department();
Int32 DepartmentID = 0;
//check query string for an id so we can determine add or update
if (Request.QueryString["DepartmentID"] != null)
{
DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
//get the current student from EF
d = (from objD in db.Departments where objD.DepartmentID == DepartmentID select objD).FirstOrDefault();
}
d.Name = txtName.Text;
d.Budget = Convert.ToDecimal(txtBudget.Text);
//redirect to updated table of students
if (DepartmentID == 0)
{
db.Departments.Add(d);
}
db.SaveChanges();
Response.Redirect("departments.aspx");
}
}
protected void grdCourse_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
Int32 CourseID = Convert.ToInt32(grdCourse.DataKeys[e.RowIndex].Values["CourseID"]);
using (comp2007Entities db = new comp2007Entities())
{
Course objE = (from en in db.Courses
where en.CourseID == CourseID
select en).FirstOrDefault();
db.Courses.Remove(objE);
db.SaveChanges();
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 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");
}
}
protected void grdDepartments_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//store the row clicked
Int32 selectedRow = e.RowIndex;
//get the selected StudentID
Int32 DepartmentID = Convert.ToInt32(grdDepartments.DataKeys[selectedRow].Values["DepartmentID"]);
//using EF to remove selected student
using (comp2007Entities db = new comp2007Entities())
{
Department d = (from objD in db.Departments where objD.DepartmentID == DepartmentID select objD).FirstOrDefault();
db.Departments.Remove(d);
db.SaveChanges();
}
//refresh grid
GetDepartments();
}
protected void grdCourses_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//store the row clicked
Int32 selectedRow = e.RowIndex;
//get the selected StudentID
Int32 CourseID = Convert.ToInt32(grdCourses.DataKeys[selectedRow].Values["CourseID"]);
//using EF to remove selected student
using (comp2007Entities db = new comp2007Entities())
{
Course c = (from objC in db.Courses where objC.CourseID == CourseID select objC).FirstOrDefault();
db.Courses.Remove(c);
db.SaveChanges();
}
//refresh grid
GetCourses();
}
protected void grdStudent_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
Int32 EnrollmentID = Convert.ToInt32(grdStudent.DataKeys[e.RowIndex].Values["EnrollmentID"]);
using (comp2007Entities db = new comp2007Entities())
{
Enrollment objE = (from en in db.Enrollments
where en.EnrollmentID == EnrollmentID
select en).FirstOrDefault();
db.Enrollments.Remove(objE);
db.SaveChanges();
GetStudent();
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//store which row was clicked
Int32 selectedRow = e.RowIndex;
//get the selected StudentID using the grid's Data Key collection
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[selectedRow].Values["StudentID"]);
//use EF to remove the selected student from the db
using (comp2007Entities db = new comp2007Entities())
{
Student s = (from objS in db.Students
where objS.StudentID == StudentID
select objS).FirstOrDefault();
//do the delete
db.Students.Remove(s);
db.SaveChanges();
}
//refresh the grid
GetStudents();
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
using (comp2007Entities db = new comp2007Entities())
{
//get selected record
Student objE = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
//Delete
db.Students.Remove(objE);
db.SaveChanges();
//Refresh the data on the page
GetCourse();
}
}
