Question

Im currently facing the problem that when i try to set focus on some control (textBox), nothing happens, maybe i just overlooked something.(somewhere i found that focus is “low-level” method and that select() should be used instead, however, it doesnt work as well)

From form Login, i launch new instance of EncryptPSW form

private void openToolStripMenuItem_Click(object sender, EventArgs e)
    {
        EncryptPSW ePSW = new EncryptPSW();
        ePSW.setOsLog(false, this);
        ePSW.ShowDialog();        
    }

On Button(which is located on EncryptPSW form ) click event i call fill method

public void fill()
    {
        if (textBoxPSW.Text.Length == 8)//psw has to be 8 chars long
        {
            if (save)//determinating whether save or fetch of data should be done
            { login.launchSave(textBoxPSW.Text,this); }
            else { login.launchOpen(textBoxPSW.Text,this); }
        }
        else { MessageBox.Show("The password must contain 8 characters");}
    }

Which launches either save or open method from Login (my problem is just with open, since during save i dont need to do anything with Focus)

public void launchOpen(string psw,EncryptPSW ePSW)
    {

        ePSW.Close();
        Encryptor.DecryptFile("loggin.bin", psw, this); //decrypting data and setting textBoxes Text property into the fetched ones
        setFocus();

    }

After all the work is done, setFocus() should be called in order to set focus and other properties.

public void setFocus()
    {
        textBoxDatabase.Focus();
        textBoxDatabase.SelectionStart = textBoxDatabase.TextLength - 1;
        textBoxDatabase.SelectionLength = 0;
    }

I tried so many different ways, like:

Calling setFocus() from within EncryptPSW_FormClosed
Calling whole open process after the EncryptPSW is closed (from within EncryptPSW_FormClosed)
and many more, however i dont remember it all.

In the case of Form_Closed the weird thing is, that when i tried to show a message box from there instead of setting focus (just to see where the problem might be), it’s showed before the EncryptPSW form is closed.

My only guess about this is that the instance of EncryptPSW is somehow blocking Login form and it’s controls

I hoped i described my problem well enough and that it makes at least a bit of sense ;]

Thanks in advance,

Regards,

Releis

Answer 1

Since the textbox is in the login form, and you are opening the EcryptPWS from it as a dialog (child), your login form will not be able to set focus to anything. You will need to set focus after it is closed. You can do this:

private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
    using(EncryptPSW ePSW = new EncryptPSW())
    {
       ePSW.setOsLog(false, this);
       if (ePSW.ShowDialog() == DialogResult.OK)
       {
           textBoxDatabase.Focus(); 
       }
    }
} 

public void launchOpen(string psw,EncryptPSW ePSW) 
{ 
    ePSW.DialogResult = DialogResult.OK;
    ePSW.Close(); 
    Encryptor.DecryptFile("loggin.bin", psw, this); //decrypting data and setting textBoxes Text property into the fetched ones 
}