CODEWITHSUNDEEP
c#.netwinforms
Umang Agrawal
Umang Agrawal

Reputation: 515

How to clear text fields when returning back to a form

I want to clear the text fields on the form once it's in focus again. Here is my code for the form in which I want to clear the text fields named user_textbox and pwd_textbox

namespace RDASMS
{
    public partial class Login : Form
    {
        public Login()
        {
            InitializeComponent();
            user_textbox.Clear();
            pwd_textbox.Clear();
        }

        private void register_Click(object sender, EventArgs e)
        {
            Registration newuser = new Registration();
            newuser.Show();
            this.Hide();
        }

        private void submit_login_Click(object sender, EventArgs e)
        {
            int checkuser = string.CompareOrdinal(user_textbox.Text, "Admin");
            if (checkuser == 0)
            {
                int checkpwd = string.CompareOrdinal(pwd_textbox.Text, "rnsit123");
                if (checkpwd == 0)
                {
                    Admin newuser = new Admin();
                    newuser.RefToLogin = this;
                    newuser.Show();
                    this.Hide();
                }
                else
                    MessageBox.Show("Invalid Password");
            }
            else
                MessageBox.Show("Invalid Username");
        }
    }
}

Upvotes: 1

Views: 220

Answers (3)

Curtis
Curtis

Reputation: 1

I use Form Activated to determine if the form has come back into focus.

Upvotes: 0

Jehof
Jehof

Reputation: 35544

Since you call Hide on your Form, which is equal to setting Visible to false, you can use the event VisibleChanged of the Form to clear your TextFields.

private void Form_VisibleChanged(object sender, EventArgs e){
  if (this.Visible == true) {
    user_textbox.Clear();
    pwd_textbox.Clear();
  }
}

Upvotes: 0

Igoy
Igoy

Reputation: 2962

You can handle the Form.Activated event to handle this, when activated clear out your textboxes.

http://msdn.microsoft.com/en-us/library/system.windows.forms.form.activated.aspx

you can put some code like this :

foreach (Control c in yourForm.Controls)
        {
            if (c is TextBox)
            {
                ((TextBox)c).Clear();
            }
       }

Upvotes: 2

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