![]() Return Marshal. UnmanagedString = Marshal.SecureStringToGlobalAllocUnicode(securePassword) Private string ConvertToUnsecureString( SecureString securePassword) You can change the Password character by setting the PasswordChar property. 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). Register the UserControl instance with your IoC as implementing the IHavePassword interface. Have your UserControl implement a IHavePassword interface. In the Window1.xaml file, add the code given in Listing 6.6 : Listing 6.6. When the user enters a password, it will be displayed as password characters. Create the IHavePassword interface with one method that returns the password clear text. The PasswordBox control is a special type of text box that enables users to. A nice explanation of them can be found in How to properly convert SecureString to String by Fabio Pintos. PasswordBox is a control that allows the user to enter masked passwords. ![]() There are some pitfalls of converting a SecureString. The SecureString needs to be converted to string to validate the entered password. Var secureString = passwordContainer.Password Var passwordContainer = parameter as IHavePassword From that we can easily obtain the secure password. The view is casted to defined interface IHavePassword. In the ViewModel the LoginCommand is linked to the Login method. Therefore the Command and the CommandParameter properties are set. In WPF there is an extra control for that: PasswordBox. In the XAML part of the View the click event of the login button is send by using the Rela圜ommand pattern that builds on WPF Commanding. the textbox in Windows Forms used to have a PasswordChar property. Public partial class LoginView : UserControl, IHavePassword The PasswordBox derives x directly from Control. The Property Password in code-behind returns the SecurePassword of the PasswordBox. WPF includes three text-entry controls: TextBox, RichTextBox, and PasswordBox. There is a WatermarkTextBox in the Extended WPF Toolkit, there is (to date). The View implements the IHavePassword interface. This project contains watermark solutions for the TextBox and the PasswordBox. To access the password in the ViewModel in a secure way some work have to be done.Īt first we define an interface that contains just the SecureString Password as property. Therefore the Password and SecurePassword property of WPF PasswordBox is not a DependencyProperty and cannot used for binding. Keeping cleartext passwords in memory is a security risk.
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