How to bind local property on control in WPF

Question

I have two controls on WPF

<Button HorizontalAlignment="Center"         Name="btnChange"         Click="btnChange_Click"         Content="Click Me" />  <Label Name="lblCompanyId"        HorizontalAlignment="Center"        DataContext="{Binding ElementName=_this}"        Content="{Binding Path=CompanyName}" /> 

As we can see that label is bound to local property(in code Behind), I don't see any value on label when I click button...

Below is my code behind...

public static readonly DependencyProperty CompanyNameProperty =   DependencyProperty.Register("CompanyName", typeof(string), typeof(Window3), new UIPropertyMetadata(string.Empty));  public string CompanyName {   get { return (string)this.GetValue(CompanyNameProperty); }   set { this.SetValue(CompanyNameProperty, value); } }  private void btnChange_Click(object sender, RoutedEventArgs e) {   this.CompanyName = "This is new company from code beind"; } 

Answer 1

Try:

Content="{Binding ElementName=_this, Path=CompanyName}" 

Without the DataContext binding.

EDIT

I have no problems with your code, have named your window to x:Name="_this"?

<Window x:Class="WpfStackOverflowSpielWiese.Window3"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         Title="Window3"         Height="300"         Width="300"         x:Name="_this">   <Grid>     <StackPanel>       <Button HorizontalAlignment="Center"               Name="btnChange"               Click="btnChange_Click"               Content="Click Me" />        <Label Name="lblCompanyId"              HorizontalAlignment="Center"              DataContext="{Binding ElementName=_this}"              Content="{Binding Path=CompanyName}"></Label>      </StackPanel>   </Grid> </Window> 

Is your window really Window3?

public partial class Window3 : Window {   public Window3() {     this.InitializeComponent();   }    public static readonly DependencyProperty CompanyNameProperty =     DependencyProperty.Register("CompanyName", typeof(string), typeof(Window3), new UIPropertyMetadata(string.Empty));    public string CompanyName {     get { return (string)this.GetValue(CompanyNameProperty); }     set { this.SetValue(CompanyNameProperty, value); }   }    private void btnChange_Click(object sender, RoutedEventArgs e) {     this.CompanyName = "This is new company from code behind";   } }