Working With WPF PasswordBox Using C# and XAML

Commonly Used Properties of PasswordBox Class

Commonly Used Events of PasswordBox Class

1 ContextMenuOpening

Occurs when the system processes an interaction that displays a context menu.

2 GotFocus

Occurs when a UIElement receives focus. (Inherited from UIElement)

3 PasswordChanged

Occurs when the value of the Password property changes.

4 Paste

Occurs when text is pasted into the control.

Below are the commonly used Methods of PasswordBox class.

1 OnLostFocus

Called before the LostFocus event occurs. (Inherited from Control)

2 SelectAll

Selects all the characters in the PasswordBox.

3 SetBinding

Attaches a binding to a FrameworkElement, using the provided binding object. (Inherited from FrameworkElement)

4 SetValue

Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject)

The following example shows the PasswordBox, labels, and button. Here is the XAML code in which all these controls are created and initialized.

<Window x:Class="PasswordBox.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="604">

<Grid >

<PasswordBox x:Name="pwBox" Height="35" Width="200" MaxLength="8"

Margin="159,55,158,229" /> <Label Content="Password"

HorizontalAlignment="Left"

Margin="108,61,0,0"

VerticalAlignment="Top" Width="70" />

<Button Content="Ok"

HorizontalAlignment="Left"

Margin="406,64,0,0"

VerticalAlignment="Top"

Width="75" Click="Button_Click"/>

<Label Name="statusText"

HorizontalAlignment="Left"

Margin="159,128,0,0"

VerticalAlignment="Top"

Width="200"

Height="38"/>

</Grid>

</Window>

Here is the button click event implementation in C# in which the program compares if the entered password is “wpf12345” then it will display the correct password message on the textblock.

using System.Windows;

namespace WPFPasswordBoxControl

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

}

private void Button_Click(object sender, RoutedEventArgs e)

{

if (pwBox.Password.ToString() == "wpf12345") statusText.Text = "Password Accepted";

else

statusText.Text = "Wrong Password";

}

}

}

When the above code is compiled and executed, it will produce the following window: