XAML文件 :
<PasswordBox Name="PasswordBox" Margin="5" Padding="5" PreviewKeyDown="Txtpassword_PreviewKeyUp"/>后台代码:
IntPtr p = System.Runtime.InteropServices.Marshal.SecureStringToBSTR(this.PasswordBox.SecurePassword); string password = System.Runtime.InteropServices.Marshal.PtrToStringBSTR(p);