Wpf passwordbox validate required5/16/2023 To have the error appear to the right of the PasswordBox, you could do something like this: Ä®nterPasswordLabel.Visibility = MyPasswordBox.Password = String.Empty ? Visibility.Visible : Visibility. ToolTipService.SetIsEnabled(MyPasswordBox, MyPasswordBox.Password = String.Empty) Then in the code behind: private void MyPasswordBox_PasswordChanged(object sender, RoutedEventArgs e) All we need to do is make use of the ValidationRules property on our binding, like this: XML To show a tooltip when the password box is empty, you could do this sort of thing with the xaml: Using WPF Validation Rules on our data binding, we can display this error automatically. Most significantly, Windows Forms relies on the Windows API to create the visual appearance of standard user interface elements such as buttons, text boxes, check boxes, and so on. MessageBox.Show("Please enter a password") If (MyPasswordBox.Password = String.Empty) Then, in the code behind: private void OkButton_Click(object sender, RoutedEventArgs e) Unless you are adding more functionality to MyPasswordBox, you could just use a PasswordBox directly, then add your validation to a button click handler or whatever event is most appropriate for your application. How can i add validation which will check if the password box is empty or not? Public static readonly DependencyProperty ValueProperty =ÄependencyProperty.Register("Value", typeof(string), typeof(MyPasswordBox), new PropertyMetadata("")) MyPasswordBoxControl.PasswordChanged += delegate Public partial class MyPasswordBox : UserControl My code behind is as follows: using System.WindowsIf it is then i would need to display a message stating "Please enter a password" I am having difficult adding validation which needs to check if the password is empty. Because security matters, you will need at one point to use a PasswordBox in your WPF application (you know, the textBox hiding the password with stars). I have a passwordbox implemented as a custom control as show below.
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