WPF 資料繫結

今有WPF Windows 變數如下

string sample="sample1234";

WPF Window的XAML之中包含一個TextBlock

<TextBlock Height="23"  Text="{Binding }" HorizontalAlignment="Left" Margin="221,43,0,0" Name="textBlock1"  VerticalAlignment="Top" Width="95"  />

只要設定Text為{Binding}，然後在Window_Loaded事件加上這行

textBlock1.DataContext = sample;

執行就會自動將變數sample的內容,繫結到TextBlock的Text屬性。
若是使用TextBox，可以在Window中宣告屬性

private string _hi;
public string HI { get { return "HI"; } set { _hi = value; } }

XAML

<TextBox Height="23" Text="{Binding Path=HI,Mode=TwoWay}" HorizontalAlignment="Left" Margin="210,113,0,0" Name="textBox1" VerticalAlignment="Top" Width="120"  />

Window_Loaded事件加上這行

textBox1.DataContext = this;