Hi my name is vishal for past 6 days i have been breaking my head on how to get id(user_id or manager_id) of currently logged in user in my application in c# windows forms with sql server 2008.
So i have a application named:Mini Project which has a login form named:frmLogin.Given below is my c# code of frmLogin:
namespace Mini_Project
{
public partial class frmLogin : Form
{
public frmLogin()
{
InitializeComponent();
}
private void frmLogin_Load(object sender, EventArgs e)
{
}
private bool ManagerUser(string username, string password)
{
bool success = false;
SqlConnection conn = new SqlConnection("Data Source=NPD-4\\SQLEXPRESS;Initial Catalog=Task;Integrated Security=true");
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
cmd = new SqlCommand("Select @count = Count(*) from [dbo].[ManagerDetail2] where username=@username and password=@password and LoginAttempts< 3", conn);
cmd.Parameters.AddWithValue("@username", txtUsername.Text);
cmd.Parameters.AddWithValue("@password", txtPassword.Text);
cmd.Parameters.AddWithValue("@manager_id", Module.MUser_ID);
cmd.Parameters.Add("@count", SqlDbType.Int).Direction = ParameterDirection.Output;
conn.Open();
cmd.ExecuteNonQuery();
if (Convert.ToInt32(cmd.Parameters["@count"].Value)>0)
{
success = true;
cmd = new SqlCommand("Update [dbo].[ManagerDetail2] set LoginAttempts=0 where username='" + txtUsername.Text + "'", conn);
cmd.ExecuteNonQuery();
}
else
{
success = false;
cmd = new SqlCommand("Update [dbo].[ManagerDetail2] set LoginAttempts=LoginAttempts+1 where username='" + txtUsername.Text + "'", conn);
cmd.ExecuteNonQuery();
}
conn.Close();
return success;
}
private bool ValidateUser(string username, string password)
{
bool success = false;
SqlConnection conn = new SqlConnection("Data Source=NPD-4\\SQLEXPRESS;Initial Catalog=Task;Integrated Security=true");
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
cmd = new SqlCommand("Select @count = Count(*) from [dbo].[UserDetail2] where username=@username and password=@password and LoginAttempts< 3", conn);
cmd.Parameters.AddWithValue("@username", txtUsername.Text);
cmd.Parameters.AddWithValue("@password", txtPassword.Text);
cmd.Parameters.AddWithValue("@user_id", Module.User_ID);
cmd.Parameters.Add("@count", SqlDbType.Int).Direction = ParameterDirection.Output;
conn.Open();
cmd.ExecuteNonQuery();
if (Convert.ToInt32(cmd.Parameters["@count"].Value)>0)
{
success = true;
cmd = new SqlCommand("Update [dbo].[UserDetail2] set LoginAttempts=0 where username='" + txtUsername.Text + "'", conn);
cmd.ExecuteNonQuery();
}
else
{
success = false;
cmd = new SqlCommand("Update [dbo].[UserDetail2] set LoginAttempts=LoginAttempts+1 where username='" + txtUsername.Text + "'", conn);
cmd.ExecuteNonQuery();
}
conn.Close();
return success;
}
private void btnLogin_Click(object sender, EventArgs e)
{
if ((txtPassword.Text == "password") && (txtUsername.Text.ToLower() == "admin"))
{
Module.AUser_ID=1;
MDIParent1 h = new MDIParent1();
h.Show();
this.Close();
}
else
{
string username = txtUsername.Text;
string password = txtPassword.Text;
bool validUser = ValidateUser(username, password);
bool validmanager = ManagerUser(username, password);
if (validUser)
{
Module.User_ID = 1;
MDIParent1 m = new MDIParent1();
m.Show();
this.Close();
}
if (validmanager)
{
Module.MUser_ID = 1;
MDIParent1 g = new MDIParent1();
g.Show();
this.Close();
}
else
{
MessageBox.Show("Invalid user name or password. Please try tomorow ", "Task", MessageBoxButtons.OK, MessageBoxIcon.Warning);
txtUsername.Focus();
}
}
}
private void btnCancel_Click(object sender, EventArgs e)
{
Application.Exit();
}
The above code works with no problem at all!
As you can see i login in to application(Mini Project) using default username:admin and default password:password
Using default username:admin and default password:password i can add new users(Normal users) and managers into my application(Mini Project).
Given below is my c# code of how i add normal users into my application. So i have form for adding normal user named:frmUser.Given below is my c# code of frmUser:
namespace Mini_Project
{
public partial class frmUser : Form
{
public frmUser()
{
InitializeComponent();
}
private void btnCreate_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source=NPD-4\\SQLEXPRESS;Initial Catalog=Task;Integrated Security=true");
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
int autoGenId = -1;
cmd = new SqlCommand("Insert into [dbo].[UserDetail2](user_first_name,user_last_name,user_dob,user_sex,email,username,password,status,row_upd_date,created_by,LoginAttempts)" + "Values(@user_first_name,@user_last_name,@user_dob,@user_sex,@email,@username,@password,@status,GetDate(),@created_by,@LoginAttempts); Select @autoGenId=SCOPE_IDENTITY();", conn);
cmd.Parameters.AddWithValue("@user_first_name", txtFName.Text);
cmd.Parameters.AddWithValue("@user_last_name", txtLName.Text);
cmd.Parameters.AddWithValue("@user_dob", dtDOB.Value);
if (cboSex.SelectedIndex == 0)
{
cmd.Parameters.AddWithValue("@user_sex", "Male");
}
else if (cboSex.SelectedIndex == 1)
{
cmd.Parameters.AddWithValue("@user_sex", "Female");
}
else if (cboSex.SelectedIndex == 2)
{
cmd.Parameters.AddWithValue("@user_sex", "Transgender");
}
cmd.Parameters.AddWithValue("@email", txtEmailID.Text);
cmd.Parameters.AddWithValue("@username", txtUsername.Text);
cmd.Parameters.AddWithValue("@password", txtPassword.Text);
cmd.Parameters.AddWithValue("@status", 1);
cmd.Parameters.AddWithValue("@Created_by",Module.MUser_ID);
cmd.Parameters.AddWithValue("@LoginAttempts", 0);
cmd.Parameters.Add("@autoGenId", SqlDbType.Int).Direction = ParameterDirection.Output;
cmd.ExecuteNonQuery();
autoGenId = Convert.ToInt32(cmd.Parameters["@autoGenId"].Value);
cmd = new SqlCommand("Update [dbo].[UserDetail2] set LoginAttempts=0 where username='" + txtUsername.Text + "'", conn);
cmd.ExecuteNonQuery();
((MDIParent1)this.MdiParent).updateUserActivities(autoGenId, 1, txtFName.Text + "User detail was added successfully");
MessageBox.Show("User Detail was added successfully", "Task", MessageBoxButtons.OK, MessageBoxIcon.Information);
conn.Close();
this.Close();
}
The above code works OK as i dont get any compilation or run-time errors.
Given below is my structure of my table:UserDetail2 in sql server 2008:
ColumnName DataType AllowNulls
user_id(auto-increment primary key) Int No
user_first_name nvarchar(50) Yes
user_last_name nvarchar(50) Yes
user_dob date Yes
user_sex nvarchar(20) Yes
email nvarchar(80) Yes
username nvarchar(25) Yes
password nvarchar(15) Yes
status bit Yes
row_upd_date datetime Yes
created_by Int Yes
LoginAttempts Int Yes
Given below is my c# code of how i add managers into my application. So i have form for adding managers named:frmManager.Given below is my c# code of frmManager:
namespace Mini_Project
{
public partial class frmManager : Form
{
public frmManager()
{
InitializeComponent();
}
private void btnCreate_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source=NPD-4\\SQLEXPRESS;Initial Catalog=Task;Integrated Security=true");
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
int bGenId = -1;
cmd = new SqlCommand("Insert into [dbo].[ManagerDetail2](manager_first_name,manager_last_name,manager_dob,manager_sex,email,username,password,status,created_by,LoginAttempts,row_upd_date)" + "Values(@manager_first_name,@manager_last_name,@manager_dob,@manager_sex,@email,@username,@password,@status,@created_by,@LoginAttempts,GetDate()); Select @autoGenId=SCOPE_IDENTITY();", conn);
cmd.Parameters.AddWithValue("@manager_first_name", txtFName.Text);
cmd.Parameters.AddWithValue("@manager_last_name", txtLName.Text);
cmd.Parameters.AddWithValue("@manager_dob", dtDOB.Value);
if (cboSex.SelectedIndex == 0)
{
cmd.Parameters.AddWithValue("@manager_sex", "Male");
}
else if (cboSex.SelectedIndex == 1)
{
cmd.Parameters.AddWithValue("@manager_sex", "Female");
}
else if (cboSex.SelectedIndex == 2)
{
cmd.Parameters.AddWithValue("@manager_sex", "Transgender");
}
cmd.Parameters.AddWithValue("@email", txtEmailID.Text);
cmd.Parameters.AddWithValue("@username", txtUsername.Text);
cmd.Parameters.AddWithValue("@password", txtPassword.Text);
cmd.Parameters.AddWithValue("@status", 1);
cmd.Parameters.AddWithValue("@Created_by", 1);
cmd.Parameters.AddWithValue("@LoginAttempts", 0);
cmd.Parameters.Add("@autoGenId", SqlDbType.Int).Direction = ParameterDirection.Output;
cmd.ExecuteNonQuery();
bGenId = Convert.ToInt32(cmd.Parameters["@autoGenId"].Value);
cmd = new SqlCommand("Update [dbo].[ManagerDetail2] set LoginAttempts=0 where username='" + txtUsername.Text + "'", conn);
cmd.ExecuteNonQuery();
((MDIParent1)this.MdiParent).updateUserActivities(bGenId, 2, txtFName.Text.ToString() + "Manager detail was added successfully");
MessageBox.Show("Manager Detail was added successfully", "Task", MessageBoxButtons.OK, MessageBoxIcon.Information);
conn.Close();
this.Close();
}
private void btnCancel_Click(object sender, EventArgs e)
{
this.Close();
}
The above code works OK as i dont get any compilation or run-time errors.
Given below is my structure of my table:ManagerDetail2 in sql server 2008:
ColumnName DataType AllowNulls
manager_id(auto-increment primary key) Int No
manager_first_name nvarchar(50) Yes
manager_last_name nvarchar(50) Yes
manager_dob date Yes
manager_sex nvarchar(20) Yes
email nvarchar(80) Yes
username nvarchar(25) Yes
password nvarchar(15) Yes
status bit Yes
created_by Int Yes
LoginAttempts Int Yes
row_upd_date datetime Yes
So i can log into application(Mini Project) using default username:admin and default password:password,or i can also log into my application(Mini Project) using username and password from my tables(either from UserDetail2 or ManagerDetail2).
What i want is how to get user_id or manager_id from currently logged in user/manager to a global variable in my application(Mini Project) through login form(frmLogin)? Can anyone help me please! Can anyone help me/guide me to get my required result!? Can anyone tell me what modifications must i need to do in my c# code and where? Any help/guidance in solving of this problem would be greatly appreciated!
