showing password characters on some event for pass

问题:

I am developing a windows phone application.In that i ask the user to login.

On the login page the user has to enter password.

Now what I want is that i give user a check box which when selected should show the characters of the password.

I have not seen any property on password box to show password characters.

Please suggest some way to do it.

回答1:

Don't think that is possible with PasswordBox... just a thought, but you might accomplish the same result using a hidden TextBox and when the user clicks the CheckBox, you just hide the PasswordBox and show the TextBox; if he clicks again, you switch their Visibility state again, and so on...

Edit

And here it is how!

Just add a page, change the ContentPanel to a StackPanel and add this XAML code:

<PasswordBox x:Name="MyPasswordBox" Password="{Binding Text, Mode=TwoWay, ElementName=MyTextBox}"/>
<TextBox x:Name="MyTextBox" Text="{Binding Password, Mode=TwoWay, ElementName=MyPasswordBox}" Visibility="Collapsed" />
<CheckBox x:Name="ShowPasswordCharsCheckBox" Content="Show password" Checked="ShowPasswordCharsCheckBox_Checked" Unchecked="ShowPasswordCharsCheckBox_Unchecked" />

Next, on the page code, add the following:

private void ShowPasswordCharsCheckBox_Checked(object sender, RoutedEventArgs e)
{
    MyPasswordBox.Visibility = System.Windows.Visibility.Collapsed;
    MyTextBox.Visibility = System.Windows.Visibility.Visible;

    MyTextBox.Focus();
}

private void ShowPasswordCharsCheckBox_Unchecked(object sender, RoutedEventArgs e)
{
    MyPasswordBox.Visibility = System.Windows.Visibility.Visible;
    MyTextBox.Visibility = System.Windows.Visibility.Collapsed;

    MyPasswordBox.Focus();
}

This works fine, but with a few more work, you can do this fully MVVM'ed!

回答2:

with default passwordbox it's not possible to implement the feature you want.

more information you can find here: http://social.msdn.microsoft.com/Forums/en/wpf/thread/98d0d4d4-1463-481f-b8b1-711119a6ba99

回答3:

You could create your own control that inherits from textbox however after each character you replace it with an *, storing the true value within a private variable on the page. Using a checkbox you can then toggle whether the value in the textbox shows the true value or the * value.

It's not an elegant solution nor is it a best practice, however I think it's still an alternative if you are willing to live with it.