WPF PasswordBox - PasswordRevealMode was not found in type 'PasswordBox'

Question

The title says it all really.

I've trying to make a log in window that uses a PasswordBox to mask the password; but I want the user to be able to peek at it if they suspect that they might have made a mistake.

I've read the Microsoft documentation and it says to use the PasswordRevealMode property. However, whenever I try it, either in the xaml or the code behind I get the following error:

PasswordRevealMode was not found in type 'PasswordBox'

Is this a bug with VS Community 2019? Or do I need to do something else to get it to work?

Answer 1

PasswordRevealMode belongs to Windows Runtime API which used in UWP not WPF, but you can use some methods to implement the function in WPF. Use a TextBox to show the PasswordBox.Password depending on needs is a very simple way.Look like below picture shown:

The xaml code is:

<StackPanel Orientation="Horizontal">  
            <Grid Width="300" Height="40">  
                <PasswordBox Name="passwordBox" PasswordChar="*" />  
                <TextBox Name="passwordTxtBox" Visibility="Collapsed" />  
            </Grid>  
            <CheckBox Margin="10" Name="showPassword" Unchecked="ShowPassword_Unchecked"  Checked="ShowPassword_Checked" HorizontalAlignment="Center" VerticalAlignment="Center"/>  
        </StackPanel>  
  

The cs code is:

private void ShowPassword_Checked(object sender, RoutedEventArgs e)  
        {  
            passwordTxtBox.Text = passwordBox.Password;  
            passwordBox.Visibility = Visibility.Collapsed;  
            passwordTxtBox.Visibility = Visibility.Visible;  
        }  
  
        private void ShowPassword_Unchecked(object sender, RoutedEventArgs e)  
        {  
            passwordBox.Password = passwordTxtBox.Text;  
            passwordTxtBox.Visibility = Visibility.Collapsed;  
            passwordBox.Visibility = Visibility.Visible;  
        }  

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Answer 2

PasswordRevealMode is only used in UWP, not WPF.