The name '' does not exist in the current context

[Alex Dransfield]

I am having a problem with this code

private void loginButton_Click(object sender, System.EventArgs e)
        {
            if (userTB.Text == "")
            {
                MessageBox.Show("You have not entered a username");
                return;
            }
            else if (userPass.Text == "")
            {
                MessageBox.Show("You have not entered a password");
                return;
            }
            MessageBox.Show("You have been logged in!");
        }

The controls themselves are declared and added to the tab, but how come the compiler says that they do not exist?

private void FirstLogin()
        {
            TabPage loginTab = new TabPage("Login");
            
            loginTab.BackColor = SystemColors.Control;

            tabControl1.TabPages.Add(loginTab); // add the tab

            Label loginLabel = new Label();
            loginLabel.Text = "You are required to log in before you can access the system.";
            loginLabel.AutoSize = true;

            Label userName = new Label();
            userName.Text = "Username: ";
            userName.AutoSize = true;
            userName.Location = new System.Drawing.Point(0, 30);

            TextBox userTB = new TextBox();
            userTB.Location = new System.Drawing.Point(61, 28);

            Label password = new Label();
            password.Text = "Password: ";
            password.AutoSize = true;
            password.Location = new System.Drawing.Point(0, 60);
            
            TextBox userPass = new TextBox();
            userPass.Location = new System.Drawing.Point(61, 58);
            userPass.PasswordChar = '*';

            Button loginButton = new Button();
            loginButton.Location = new System.Drawing.Point(0, 90);
            loginButton.Text = "Login";
            loginButton.Click += new System.EventHandler(loginButton_Click);

            loginTab.Controls.Add(loginLabel);
            loginTab.Controls.Add(userName);
            loginTab.Controls.Add(userTB);
            loginTab.Controls.Add(userPass);
            loginTab.Controls.Add(password);
            loginTab.Controls.Add(loginButton);
        }

[Alex Dransfield]

Can anybody answer this? It's for a school project

[Rabbit]

You are dynamically creating your controls in FirstLogin. Those variables in that function are scoped only for that function. You can not refer to them outside of that function. I don't know C# so I don't know what attributes the controls have but it must have some sort of name or ID attribute that you can assign.