彩票走势图

1、WPF 获得DataTemplate中的控件, 下面这个示例是从ListBox中获得ListBoxItem模板的控件信息。

　　前台代码：

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

<ListBox.ItemTemplate>

<DataTemplate x:Name="gridDataTemplate&quot;>

<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=&quot;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>

资源：

<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>

后台代码：

public Window1()

{

InitializeComponent();

listBox1.DataContext = GetDataTable();

}

Click事件：关键代码

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);

}

}

数据源：当然也可以自己连接数据库获得数据源

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; //自动递增ID号

data.Columns.Add(ID);

//设置主键

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&quot;, 1);

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

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

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

return data;

}

值转换：BackgroundConverter类是改变颜色，BoolConverter是将Bool互相转换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

}

　　//关键函数

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&lt;T>(child, childName);

if (childOfChild != null)

{

return childOfChild;

}

}

}

return null;

}
效果图： 当选中第一项，然后单击"GetControlFromDataTemplate"按钮，则弹出第一项中控件的内容XiaoM。