1、WPF 獲得DataTemplate中的控件, 下面這個示例是從ListBox中獲得ListBoxItem模板的控件信息。

　　前臺代碼：

<ListBox Margin="12,32,0,0" IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding}" Name="listBox1" SelectedIndex="0" Height="186"
 VerticalAlignment="Top" HorizontalAlignment="Left" Width="287">

<ListBox.ItemTemplate>

<DataTemplate x:Name="gridDataTemplate">

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="0.5*"/>

<ColumnDefinition Width="0.5*"/>

<ColumnDefinition Width="0.5*"/>

<ColumnDefinition Width="0.5*"/>

</Grid.ColumnDefinitions>

<TextBlock Text="{Binding Path=ID}"/>

<TextBlock Grid.Column="1" x:Name="

myName" Text="{Binding Path=Name}"/>

<TextBlock Grid.Column="2" Text="{Binding Path=Age}"
Background="{Binding Path=Age, Converter=

{StaticResource BackgroundConverter}}"/>

<CheckBox Grid.Column="3" x:Name="myCheckBox"
 IsChecked="{Binding Path= ISBoy, Converter=

{StaticResource BoolConverter}}"/>

</Grid>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

資源：

<Window.Resources>

<Con:BackgroundConverter x:Key="BackgroundConverter"/>

<Con:BoolConverter x:Key="BoolConverter"/>

</Window.Resources>

<Button Height="23" HorizontalAlignment="Left"
Margin="35,251,0,0" Name="button1"
VerticalAlignment="Top" Width="209"
Click="button1_Click">GetControlFromDataTemplate</Button>

后臺代碼：

public Window1()

{

InitializeComponent();

listBox1.DataContext = GetDataTable();

}

Click事件：關(guān)鍵代碼

private void button1_Click(object sender, RoutedEventArgs e)

{

ListBoxItem myListBoxItem =
(ListBoxItem)listBox1.ItemContainerGenerator.
ContainerFromItem(listBox1.SelectedItem);

ContentPresenter contentpresenter =

FindFirstVisualChild<ContentPresenter>(myListBoxItem);

DataTemplate MyDataTemplate =
contentpresenter.ContentTemplate;

TextBlock myTextBlock =
 MyDataTemplate.FindName("myName", contentpresenter) as TextBlock;

if (myTextBlock != null)

{

MessageBox.Show(myTextBlock.Text);

}

}

數(shù)據(jù)源：當(dāng)然也可以自己連接數(shù)據(jù)庫獲得數(shù)據(jù)源

private DataTable GetDataTable()

{

DataTable data = new DataTable("MyDataTable");

DataColumn ID = new DataColumn("ID");//第一列

ID.DataType = System.Type.GetType("System.Int32");

//ID.AutoIncrement = true; //自動遞增ID號

data.Columns.Add(ID);

//設(shè)置主鍵

DataColumn[] keys = new DataColumn[1];

keys[0] = ID;

data.PrimaryKey = keys;

data.Columns.Add(new DataColumn("Name",typeof(string)));//第二列

data.Columns.Add(new DataColumn("Age",typeof(string)));//第三列

data.Columns.Add(new DataColumn("ISBoy", typeof(Int16)));//第三列

data.Rows.Add(1," XiaoM"," 20", 1);

data.Rows.Add(2," XiaoF"," 122", 0);

data.Rows.Add(3," XiaoA", " 29", 1);

data.Rows.Add(4," XiaoB", " 102", 0);

return data;

}

值轉(zhuǎn)換：BackgroundConverter類是改變顏色，BoolConverter是將Bool互相轉(zhuǎn)換Int

public class BackgroundConverter : IValueConverter

{

#region IValueConverter Members

public object Convert(object value, Type targetType, object parameter,

System.Globalization.CultureInfo culture)

{

Color color = new Color();

int num = int.Parse(value.ToString());

if (num > 100)

color = Colors.Yellow;

else if (num < 50)

color = Colors.LightGreen;

else

color = Colors.LightPink;

return new SolidColorBrush(color);

}

public object ConvertBack(object value,

Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

throw new NotImplementedException();

}

#endregion

}

public class BoolConverter : IValueConverter

{

#region IValueConverter Members

public object Convert(object value, Type targetType,

object parameter, System.Globalization.CultureInfo culture)

{

bool flag = false;

if (1 == int.Parse(value.ToString()))

{

flag = true;

}

if( 0 == int.Parse(value.ToString()))

flag = false;

return flag;

}

public object ConvertBack(object value,

Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

if ((bool)value)

{

return 1;

}

else

return 0;

}

#endregion

}

　　//關(guān)鍵函數(shù)

public T FindFirstVisualChild2<T>

(DependencyObject obj, string childName) where T : DependencyObject

{

for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)

{

DependencyObject child = VisualTreeHelper.GetChild(obj, i);

if (child != null && child is T && child.GetValue

(NameProperty).ToString() == childName)

{

return (T)child;

}

else

{

T childOfChild = FindFirstVisualChild2<T>(child, childName);

if (childOfChild != null)

{

return childOfChild;

}

}

}

return null;

}
 效果圖： 當(dāng)選中第一項(xiàng)，然后單擊"GetControlFromDataTemplate"按鈕，則彈出第一項(xiàng)中控件的內(nèi)容XiaoM。