C# – Enter Key Not Consumed by MessageBox, C#, Windows Forms

cwinforms

I have a form with a custom control on it. Assume the custom
control has the focus. If I show a message box from that form,
when the message box is closed by pressing Enter on either the
OK or Cancel button, the message box is closed and then the
custom control gets a keyboard event (OnKeyUp) with the enter
key.

This doesn't happen if the space key is used to "press" either
the OK or Cancel button.

It's like the MessageBox doesn't consume the Enter Key for
some reason. I tried this with the Form's KeyPreview property
turned on, but there was no difference.

Does anyone know how to stop that enter message after it is
used to press the MessageBox button?

Best Answer

Can't you ignore it in code? This is VB syntax:

    Private Sub frmEdit_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyUp
    If e.KeyCode = Keys.Enter Then
        e.Handled = True
    End If
End Sub

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You probably forgot to set the form's KeyPreview property to True. Overriding the ProcessCmdKey() method is the generic solution:

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
  if (keyData == (Keys.Control | Keys.F)) {
    MessageBox.Show("What the Ctrl+F?");
    return true;
  }
  return base.ProcessCmdKey(ref msg, keyData);
}

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If you work with Visual Studio then it is pretty easy to get persistable settings. Right click on the project in Solution Explorer and choose Properties. Select the Settings tab and click on the hyperlink if settings doesn't exist.

Use the Settings tab to create application settings. Visual Studio creates the files Settings.settings and Settings.Designer.settings that contain the singleton class Settings inherited from ApplicationSettingsBase. You can access this class from your code to read/write application settings:

Properties.Settings.Default["SomeProperty"] = "Some Value";
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This technique is applicable both for console, Windows Forms, and other project types.

Note that you need to set the scope property of your settings. If you select Application scope then Settings.Default.<your property> will be read-only.

Reference: How To: Write User Settings at Run Time with C# - Microsoft Docs

Best Answer

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