Question

guys!
I’ve got 2 forms in application – working form (frmMain) and form of settings (frmSettings).
There are two buttons on frmSettings – Save and Cancel. In frmMain I use the following approach to show the frmSettings:

 private void btnSettings_Click(object sender, EventArgs e)
        {
            frmSettings = new SettingsForm();
            frmSettings.ShowDialog();
            // ...
        }

The problem is I don’t know, how to detect, which button was pressed on the frmMain – Save or Cancel. The further logic of the program depends on this fact. I need something like this:

private void btnSettings_Click(object sender, EventArgs e)
        {
            frmSettings = new SettingsForm();
            frmSettings.ShowDialog();

            if(/* frmSettings.SaveButton.WasClicked == true */)
            {
                InitializeServices();
            }
            // ...
        }

Please, give me an advice, how to implement such kind of interaction between forms. Better without using global variables for saving buttons state.
Thanks beforehand.

Answer 1

ShowDialog returns a DialogResult object that allow you to know that. You have to:

On Save Button’s click event, set this.DialogResult to DialogResult.OK

On Cancel Button’s click event, set this.DialogResult to DialogResult.Cancel

private void btnSettings_Click(object sender, EventArgs e)
{
   frmSettings = new SettingsForm();
   if(frmSettings.ShowDialog() == DialogResult.OK)
   {
       InitializeServices();
   }
   //.......    
}

Edited to manage the DialogResult as @tsiorn’s answer: setting form’s DialgoResult insted of setting that property on each button.