protected void BtnUpdate_Click(object sender, EventArgs e)
{
using (var context = new PnpLoanEntities())
{
int userId = int.Parse(Request.QueryString["ID"]);
//sql version: select top 1 * from SecurityUser
// where SecurityUserId=@userId
//LINQ:
//var user = (from u in context.SecurityUsers
// where u.SecurityUserId == userId)
// .FirstOrDefault();
//Lambda
var user = context
.SecurityUsers
.FirstOrDefault(u => u.SecurityUserId == userId);
user.LastName = TxtLastname.Text;
user.FirstName = TxtFirstname.Text;
user.MiddleName = TxtMiddlename.Text;
user.Email = TxtEmail.Text;
user.UserTypeId = int.Parse(DdlUserType.SelectedValue);
context.SaveChanges(); //push the changes to the Database
}
Response.Redirect("UserList.aspx");
}
private void DisplayUsers()
{
using (var context = new PnpLoanEntities())
{
GridUser.DataSource = context.SecurityUsers.ToList();
GridUser.DataBind();
}
}
private void DisplayUserType()
{
using (var context = new PnpLoanEntities())
{
DdlUserType.DataSource = context.UserTypes.ToList();
DdlUserType.DataValueField = "UserTypeId";
DdlUserType.DataTextField = "Description";
DdlUserType.DataBind();
}
}
private void AddUserToDataBase()
{
using (var context = new PnpLoanEntities())
{
var user = new SecurityUser();
user.CreatedDate = DateTime.Now;
user.LastName = TxtLastname.Text;
user.FirstName = TxtFirstname.Text;
user.MiddleName = TxtMiddlename.Text;
user.UserName = TxtUsername.Text;
user.Password = Encryption.GetMD5Hash(TxtPassword.Text);
user.UserTypeId = int.Parse(DdlUserType.SelectedValue);
user.Email = TxtEmail.Text;
context.SecurityUsers.Add(user);
context.SaveChanges();
}
}
private void DisplayUserDetails()
{
int id = int.Parse(Request.QueryString["ID"]);
using (var context = new PnpLoanEntities())
{
//SQL: select * from SecurityUser where SecurityUser ID =
//LINQ
var selectQuery = from u in context.SecurityUsers
where u.SecurityUserId == id
select u;
SecurityUser user = selectQuery.FirstOrDefault();
TxtLastname.Text = user.LastName;
TxtFirstname.Text = user.FirstName;
TxtMiddlename.Text = user.MiddleName;
TxtUsername.Text = user.UserName;
TxtEmail.Text = user.Email;
DdlUserType.SelectedValue = user.UserTypeId.ToString();
}
}
protected void BtnDelete_Click(object sender, EventArgs e)
{
if (GridUser.SelectedRow == null)
{
return; //this will not execute the codes below anymore
}
int userId = int.Parse(GridUser
.SelectedRow
.Cells[1]
.Text);
using (var context = new PnpLoanEntities())
{
var user = context
.SecurityUsers
.FirstOrDefault(u => u.SecurityUserId == userId);
context.SecurityUsers.Remove(user);
context.SaveChanges();
}
DisplayUsers(); //refresh the datagrid after deleting
GridUser.SelectedIndex = -1; //this will 'unselect' all other rows previously selected
}
private void DisplayUsers()
{
using (var context = new PnpLoanEntities())
{
//SQL Equivalent
//select Lastname, Firstname from Security Users
//LINQ
var query = from u in context.SecurityUsers
select new {
u.SecurityUserId,
u.LastName,
u.FirstName,
u.MiddleName,
u.Email,
u.UserType.Description
};
GridUser.DataSource = query.ToList();
GridUser.DataBind();
//GridUser.DataSource = context.SecurityUsers.ToList();
//GridUser.DataBind();
}
}
private List <string> ValidateInputs()
{
var errors = new List <string>();
if (string.IsNullOrWhiteSpace(TxtLastname.Text))
{
errors.Add("Lastname is Required.");
}
if (string.IsNullOrWhiteSpace(TxtFirstname.Text))
{
errors.Add("Firstname is Required.");
}
if (string.IsNullOrWhiteSpace(TxtMiddlename.Text))
{
errors.Add("Middlename is Required.");
}
if (string.IsNullOrWhiteSpace(TxtUsername.Text))
{
errors.Add("Username is Required.");
}
if (string.IsNullOrWhiteSpace(DdlUserType.Text))
{
errors.Add("Usertype is Required.");
}
if (string.IsNullOrWhiteSpace(TxtEmail.Text))
{
errors.Add("Email is required.");
}
if (string.IsNullOrWhiteSpace(TxtPassword.Text))
{
errors.Add("Password is Required.");
}
if (string.IsNullOrWhiteSpace(TxtRepeatPassword.Text))
{
errors.Add("Re-type Password.");
}
if (TxtPassword.Text != TxtRepeatPassword.Text)
{
errors.Add("Password Mismatch");
}
using (var entityContext = new PnpLoanEntities())
{
//select * from SecurityUser where Usernmae='encoder1'
var users = from u in entityContext.SecurityUsers
where u.UserName == TxtUsername.Text.Trim()
select u;
if (users.Count() > 0) //count returns the number of rows from the query
{
errors.Add("Username already exist.");
}
//LINQ
var emailCheck = from u in entityContext.SecurityUsers
where u.Email == TxtEmail.Text.Trim()
select u;
if (emailCheck.Any())
{
errors.Add("Email already exist.");
}
}
return(errors);
}