/// <summary>
/// This method is the event handler for the save button. Saves/Updates a todo from DB
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void SaveButton_Click(object sender, EventArgs e)
{
// Use EF to connect to the server
using (TodoConnection db = new TodoConnection())
{
// use the Todo model to create a new todo object and
// save a new record
Todo newTodo = new Todo();
int TodoID = 0;
if (Request.QueryString.Count > 0) // our URL has a TodoID in it
{
// get the id from the URL
TodoID = Convert.ToInt32(Request.QueryString["TodoID"]);
// get the current todo from EF DB
newTodo = (from todo in db.Todos
where todo.TodoID == TodoID
select todo).FirstOrDefault();
}
// add form data to the new todo record
newTodo.TodoName = TodoNameTextBox.Text;
newTodo.TodoNotes = TodoNotesTextBox.Text;
newTodo.Completed = TodoCompletedCheckBox.Checked;
// use LINQ to ADO.NET to add / insert new todo into the database
if (TodoID == 0)
{
db.Todos.Add(newTodo);
}
// save our changes - also updates and inserts
db.SaveChanges();
// Redirect back to the updated students page
Response.Redirect("~/Secured/TodoList.aspx");
}
}
/// <summary>
/// This method gets the todo associeted with the ID from the URL and prepopulates the form
/// </summary>
protected void GetTodo()
{
// populate teh form with existing data from the database
int TodoID = Convert.ToInt32(Request.QueryString["TodoID"]);
// connect to the EF DB
using (TodoConnection db = new TodoConnection())
{
// populate a todo object instance with the StudentID from the URL Parameter
Todo updatedTodo = (from todo in db.Todos
where todo.TodoID == TodoID
select todo).FirstOrDefault();
// map the student properties to the form controls
if (updatedTodo != null)
{
TodoNameTextBox.Text = updatedTodo.TodoName;
TodoNotesTextBox.Text = updatedTodo.TodoNotes;
TodoCompletedCheckBox.Checked = (bool) updatedTodo.Completed;
}
}
}
