WPF ComboBox控件

一．Combox

  <ComboBox  Name="cboStatus" Height="23"  Width="103"  Margin="2 10 10 10"  SelectedIndex="0" BorderBrush="#93688693"  Background="#FFECF5F5">

                    <ComboBoxItem Content="内容1 />

                    <ComboBoxItem Content="内容2" />

   </ComboBox>

二．Combox显示图标

代码：

<ComboBox Height="33" HorizontalAlignment="Right" Margin="0,94,31,0" x:Name="comboBox1" VerticalAlignment="Top" Width="142" SelectedIndex="0">
    <ComboBoxItem>
        <StackPanel Orientation="Horizontal">
            <Image Source="Images/roles.png" Height="30" />
            <TextBlock Text="Select a role" />
        </StackPanel>
    </ComboBoxItem>
    <ComboBoxItem Background="LightCoral">
        <StackPanel Orientation="Horizontal">
            <Image Source="Images/cashier.gif" Height="30" />
            <TextBlock Text="Cashier" />
        </StackPanel>
    </ComboBoxItem>
    <ComboBoxItem Background="LightGreen">
        <StackPanel Orientation="Horizontal">
            <Image Source="Images/manager.gif" Height="30" />
            <TextBlock Text="Manager" />
        </StackPanel>
    </ComboBoxItem>
</ComboBox>

三．Combox数据的绑定

前台代码：

      <ComboBox Height="23" HorizontalAlignment="Left" Margin="86,143,0,0" Name="comboBox1" VerticalAlignment="Top" Width="120">
        </ComboBox>

后台代码:

    class ProductImg   //声明类
    {
        int id;

        public int Id
        {
            get { return id; }
            set { id = value; }
        }
        string img;

        public string Img
        {
            get { return img; }
            set { img = value; }
        }
    }

      ObservableCollection<ProductImg> imgs = new     ObservableCollection<ProductImg>();   //集合，即数据源

       comboBox1.SelectedValuePath = "Id";   //程序内部维护的值
         comboBox1.DisplayMemberPath = "Img";  //显示的内容
         comboBox1.ItemsSource = imgs;  //数据源
         comboBox1.SelectedValue = 3；  //选中的值

四．Combox模板的使用

（1）Visibility="Collapsed" 可以隐藏当前子项

 <ComboBox Height="23" Name="comboBox3" Width="103"  Margin="15" Text="用?户§类
   え?型í" SelectedIndex="0" BorderBrush="Black">

   <ComboBoxItem IsSelected="False" Visibility="Collapsed">

        <StackPanel Orientation="Horizontal">

        <TextBlock Text="用?户§类え?型í" />

        </StackPanel>

      </ComboBoxItem>

</ComboBox>

（2）绑定数据

  <ComboBox.ItemTemplate>

       <DataTemplate>

            <TextBlock Text="{Binding Path=Key}">

             </TextBlock>

        </DataTemplate>

  </ComboBox.ItemTemplate>

五．Combox获取选中值

      获取选中对象：combox1.SelectedItem

      获取选中索引值：combox1.SelectedIndex

      获取选中的值：cboUsertype.SelectedValue