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Name Property: Get ControlsExplore the Name property and see how Name is used within C# code.
WPF
This page was last reviewed on Sep 28, 2022.
Name. Controls in WPF are accessed by their Name properties. We specify the Name property in the XAML, and then can access the control by that name directly in C# code.
Property notes. Name allows controls to interact. The name properties are automatically added in Visual Studio. This property connects markup and code.
Example. We create a new WPF project and drag 2 controls to the Grid: a Button and a CheckBox. We will use the Name attribute to make these 2 controls talk to each other.
Note We specify the "Name" on the Button (MainButton) and the Name on the CheckBox (MainCheckBox). Sorry for the unimaginative names.
Next We add the Checked and Unchecked event handlers to the CheckBox. We allow Visual Studio to generate CheckBox_Checked.
CheckBox
Example markup, XAML:
<Window x:Class="WpfApplication26.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Grid> <Button Content="Button" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="75" Name="MainButton"/> <CheckBox Content="CheckBox" HorizontalAlignment="Left" Margin="10,35,0,0" VerticalAlignment="Top" Checked="CheckBox_Checked" Unchecked="CheckBox_Checked" Name="MainCheckBox"/> </Grid> </Window>
using System.Windows; namespace WpfApplication26 { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private void CheckBox_Checked(object sender, RoutedEventArgs e) { // ... Access MainCheckBox by name. // Use its IsChecked property. bool? state = this.MainCheckBox.IsChecked; if (state.HasValue) { // ... Access MainButton by name. this.MainButton.Content = state.ToString(); } } } }
Named controls. The MainCheckBox and the MainButton controls are accessed within the CheckBox_Checked event handler. Those names match the Name attributes set in the XAML.
Tip This is the easiest way to get a specific control. No searching or loop-based algorithm is needed.
Instead The Name from the XAML is transformed into a property on the MainWindow class, ready for use.
Property
Summary. The Name property is useful. It allows programmatic access to controls from anywhere in the code. It is often set automatically, but we can adjust it in the XAML.
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This page was last updated on Sep 28, 2022 (edit).
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