protected void getStudent()
{
//fill in form based upon selected student
using (DefaultConnection db = new DefaultConnection())
{
Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
//search departmet
Student stdt = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
//populate fields
txtLName.Text = stdt.LastName;
txtFName.Text = stdt.FirstMidName;
//populate courses grid
var courses = from en in db.Enrollments
where en.StudentID == StudentID
orderby en.Course.Title
select en;
//bind to grid
grdCourses.DataSource = courses.ToList();
grdCourses.DataBind();
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
//create new course and fill properties
Course objc = new Course();
objc.Title = txtTitle.Text;
objc.Credits = Convert.ToInt32(txtCredits.Text);
objc.DepartmentID = Convert.ToInt32(ddlDepartments.SelectedValue);
//save
db.Courses.Add(objc);
db.SaveChanges();
//redirect back to courses page
Response.Redirect("courses.aspx");
//handle updating a record
if (!string.IsNullOrEmpty(Request.QueryString["CourseID"]))
{
Int32 CourseID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
}
}
}
protected void getCourse()
{
//fill in form based upon selected course
Int32 CourseID = Convert.ToInt32(Request.QueryString["CourseID"]);
using (DefaultConnection db = new DefaultConnection())
{
//query database
Course objc = (from c in db.Courses
where c.CourseID == CourseID
select c).FirstOrDefault();
//populate the form
txtTitle.Text = objc.Title;
txtCredits.Text = Convert.ToString(objc.Credits);
//assaign value for drop down menu
ddlDepartments.SelectedValue = Convert.ToString(objc.DepartmentID);
//populate enrollments grid
var Enrollments = from en in db.Enrollments
where en.CourseID == CourseID
orderby en.Student.LastName, en.Student.FirstMidName
select en;
//bind to grid
grdEnrollments.DataSource = Enrollments.ToList();
grdEnrollments.DataBind();
}
}
protected void grdDepartments_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//identify the DepartmentID to be deleted from the row the user selected
Int32 DepartmentID = Convert.ToInt32(grdDepartments.DataKeys[e.RowIndex].Values["DepartmentID"]);
try
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
Department dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
//delete
db.Departments.Remove(dep);
db.SaveChanges();
//refresh grid
GetDepartments();
}
}
catch (Exception ex)
{
Response.Redirect("error.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
//creating new student
Student stu = new Student();
Int32 StudentID = 0;
//check for a url
if (!String.IsNullOrEmpty(Request.QueryString["StudentID"]))
{
//get the id
StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
//look up student
stu = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
}
//properties for new students
stu.LastName = txtLast.Text;
stu.FirstMidName = txtFirst.Text;
stu.EnrollmentDate = Convert.ToDateTime(txtEnroll.Text);
if (StudentID == 0)
{
db.Students.Add(stu);
}
//save new students
db.SaveChanges();
//send back to student page
Response.Redirect("Students.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
//create new department in memory
Department dep = new Department();
//check url
if(!String.IsNullOrEmpty(Request.QueryString["DepartmentID"]))
{
Int32 DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
}
//fill new properties of the new department
dep.Name = txtName.Text;
dep.Budget = Convert.ToDecimal(txtBudget.Text);
//save the new department
if(String.IsNullOrEmpty(Request.QueryString["DepartmentID"]))
{
db.Departments.Add(dep);
}
db.Departments.Add(dep);
db.SaveChanges();
//redirect to department list page
Response.Redirect("departments.aspx");
}
}
protected void GetDepartment()
{
try
{
//look up the selected department and fill the form
using (DefaultConnection db = new DefaultConnection())
{
//store the id from the url in a variable
Int32 DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
//look up the department
Department dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
//pre-populate the form fields
txtName.Text = dep.Name;
txtBudget.Text = dep.Budget.ToString();
}
}
catch (Exception ex)
{
Response.Redirect("error.aspx");
}
}
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");
}
}
//Entity Framework to bring in students list
protected void GetStudents()
{
using (DefaultConnection db = new DefaultConnection())
{
var stu = from s in db.Students select s;
grdStudents.DataSource = stu.ToList();
grdStudents.DataBind();
}
}
protected void GetStudents()
{
//use enity framework to connect to get list of students
using (DefaultConnection db = new DefaultConnection())
{
var stud = from s in db.Students
select s;
//bind stud query results to our grid
grdStudents.DataSource = stud.ToList();
grdStudents.DataBind();
}
}
protected void GetDepartments()
{
//use Entity Framework to connect and get the list of departments
using (DefaultConnection db = new DefaultConnection())
{
var deps = from d in db.Departments
select d;
//bind the deps query result to our grid
grdDepartments.DataSource = deps.ToList();
grdDepartments.DataBind();
}
}
protected void GetStudents()
{
//use entity framework to connect and get list of Departments
using (DefaultConnection db = new DefaultConnection())
{
var stud = from d in db.Students
select d;
//bind the stud query result to grid
grdStudents.DataSource = stud.ToList();
grdStudents.DataBind();
}
}
protected void getStudents()
{
//conect and use database student table
using (DefaultConnection db = new DefaultConnection())
{
var stdt = from s in db.Students
select s;
//bind query return to grid
grdStudents.DataSource = stdt.ToList();
grdStudents.DataBind();
}
}
protected void GetStudents()
{
//Using the Entity Framework to connect and get the list of Students.
using (DefaultConnection db = new DefaultConnection())
{
var students = from stu in db.Students
select stu;
//Binding the Stu query results to the grid.
grdStudents.DataSource = students.ToList();
grdStudents.DataBind();
}
}
protected void GetStudent()
{
using (DefaultConnection db = new DefaultConnection())
{
Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
Student stu = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
txtLastName.Text = stu.LastName;
txtFirstName.Text = stu.FirstMidName;
txtDate.Text = stu.EnrollmentDate.ToString("yyyy-MM-dd");
}
}
protected void GetStudents()
{
//look up the selected student
using (DefaultConnection db = new DefaultConnection())
{
Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
Student stu = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
txtLast.Text = stu.LastName;
txtFirst.Text = stu.FirstMidName;
}
}
protected void getDepartments()
{
using (DefaultConnection db = new DefaultConnection())
{
var dpmt = from d in db.Departments
orderby d.Name
select d;
ddlDepartments.DataSource = dpmt.ToList();
ddlDepartments.DataBind();
//add default option to drop down list
ListItem DefaultItem = new ListItem("-Select-", "0");
ddlDepartments.Items.Insert(0, DefaultItem);
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
try
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
//create a new department in memory
Department dep = new Department();
Int32 DepartmentID = 0;
//check for a url
if (!String.IsNullOrEmpty(Request.QueryString["DepartmentID"]))
{
//get the id from the url
DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
//look up the department
dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
}
//fill the properties of the new department
dep.Name = txtName.Text;
dep.Budget = Convert.ToDecimal(txtBudget.Text);
//add if we have no id in the url
if (DepartmentID == 0)
{
db.Departments.Add(dep);
}
//save the new department
db.SaveChanges();
//redirect to the departments list page
Response.Redirect("departments.aspx");
}
}
catch (Exception ex)
{
Response.Redirect("error.aspx");
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
using (DefaultConnection db = new DefaultConnection())
{
Student stu = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
db.Students.Remove(stu);
db.SaveChanges();
GetStudents();
}
}
protected void GetDepartment()
{
//look up the selected department and fill the form
using (DefaultConnection db = new DefaultConnection())
{
Int32 DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
//look up department
Department dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
//pre-populate the form fields
txtName.Text = dep.Name;
txtBudget.Text = dep.Budget.ToString();
}
}
protected void GetStudents()
{
using (DefaultConnection db = new DefaultConnection())
{
//Store the id from the URL in a variable
Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
//look up the Student.
Student stu = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
//pre-populate the form fields
txtLastName.Text = stu.LastName;
txtFirstMidName.Text = stu.FirstMidName;
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//identify student id to manipulate
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
//Select current id based upon selected row
using (DefaultConnection db = new DefaultConnection())
{
Student stdt = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
db.Students.Remove(stdt);
db.SaveChanges();
//refresh grid
getStudents();
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect to database
using (DefaultConnection db = new DefaultConnection())
{
//create new student in memory
Student stdt = new Student();
Int32 StudentID = 0;
DateTime EnDate = DateTime.Now;
//handle updating a record
if (!String.IsNullOrEmpty(Request.QueryString["StudentID"]))
{
StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
stdt = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
//set enroll date to equal existing result
EnDate = stdt.EnrollmentDate;
}
//fill in student details
stdt.FirstMidName = txtLName.Text;
stdt.LastName = txtFName.Text;
//add current date time as time of registering
stdt.EnrollmentDate = EnDate;
if (StudentID == 0)
{
//create new row in database
db.Students.Add(stdt);
}
db.SaveChanges();
//redirect back to students page
Response.Redirect("students.aspx");
}
}
protected void GetStudent()
{
//look up selected student and fill form
using (DefaultConnection db = new DefaultConnection())
{
//store id from the url in a variable
Int32 StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
//look up student
Student stud = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
//populate form fields
txtLast.Text = stud.LastName;
txtFirst.Text = stud.FirstMidName;
txtEnroll.Text = stud.EnrollmentDate.ToString();
}
}
protected void grdDepartments_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//identify department id to be deleted from the row the user selected
Int32 DepartmentID = Convert.ToInt32(grdDepartments.DataKeys[e.RowIndex].Values["DepartmentID"]);
//connect to database
using (DefaultConnection db = new DefaultConnection())
{
//SElect current department based upon id
Department dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
db.Departments.Remove(dep);
db.SaveChanges();
//refresh the grid
GetDepartments();
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//indentifying the StudentID to be deleted from the row the user selected.
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
//Connecting to the Database.
using (DefaultConnection db = new DefaultConnection())
{
Student stu = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
//Deleting.
db.Students.Remove(stu);
db.SaveChanges();
//Refreshing Grid.
GetStudents();
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//identify the studentID to be deleted from the row the user selected
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
//connect to database
using (DefaultConnection db = new DefaultConnection())
{
Student stud = (from d in db.Students
where d.StudentID == StudentID
select d).FirstOrDefault();
//delete
db.Students.Remove(stud);
db.SaveChanges();
//refresh grid
GetStudents();
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
using (DefaultConnection db = new DefaultConnection())
{
//create a new student in memory
Student stud = new Student();
Int32 StudentID = 0;
//check for url
if (!String.IsNullOrEmpty(Request.QueryString["StudentID"]))
{
//get id from url
StudentID = Convert.ToInt32(Request.QueryString["StudentID"]);
//look up the student
stud = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
}
//fill the properties of the new student
stud.LastName = txtLast.Text;
stud.FirstMidName = txtFirst.Text;
stud.EnrollmentDate = Convert.ToDateTime(txtEnroll.Text);
//add if we have no id in the url
if (StudentID == 0)
{
db.Students.Add(stud);
}
//save the student
db.SaveChanges();
//redirect to student list page
Response.Redirect("students.aspx");
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
//create a new department in memory
Department dep = new Department();
// op2 :Int32 DepartmentID = 0;
//check fot a url
if (!String.IsNullOrEmpty(Request.QueryString["DepartmentID"]))
{
Int32 DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
// op2: DepartmentID = Convert.ToInt32(Request.QueryString["DepartmentID"]);
dep = (from d in db.Departments
where d.DepartmentID == DepartmentID
select d).FirstOrDefault();
}
//fill the property of the new department
dep.Name = txtname.Text;
dep.Budget = Convert.ToDecimal(txtBudget.Text);
//add if we have no id in the url
if(String.IsNullOrEmpty(Request.QueryString["DepartmentID"])){
db.Departments.Add(dep);
}
//op2: if(DepartmentID==0)
// save the new department
//excute the change commands
db.SaveChanges();
//redirect to the departments list page
Response.Redirect("departments.aspx");
}
}
protected void grdStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//identify id of student to delete from the row the user has chosen
Int32 StudentID = Convert.ToInt32(grdStudents.DataKeys[e.RowIndex].Values["StudentID"]);
//connect
using (DefaultConnection db = new DefaultConnection())
{
Student stud = (from s in db.Students
where s.StudentID == StudentID
select s).FirstOrDefault();
//delete
db.Students.Remove(stud);
db.SaveChanges();
//refresh grid
Response.Redirect("students.aspx");
}
}