Silverlight中关于ComboBox的各种使用

前端放置了几个ComboBox的控件。

 <Grid x:Name="LayoutRoot" Background="White">
         <ComboBox Height="23" HorizontalAlignment="Left" Margin="26,49,0,0" Name="comboBox1" VerticalAlignment="Top" Width="120" />
         <ComboBox Height="23" HorizontalAlignment="Left" Margin="223,49,0,0" Name="comboBox2" VerticalAlignment="Top" Width="120" SelectionChanged="comboBox2_SelectionChanged" />
         <ComboBox Height="23" HorizontalAlignment="Left" Margin="26,140,0,0" Name="comboBox3" VerticalAlignment="Top" Width="120" />
         <ComboBox Height="23" HorizontalAlignment="Left" Margin="223,140,0,0" Name="comboBox4" VerticalAlignment="Top" Width="120" />
         <ComboBox Height="23" HorizontalAlignment="Left" Margin="26,199,0,0" Name="comboBox5" VerticalAlignment="Top" Width="120" SelectionChanged="comboBox5_SelectionChanged" />
     </Grid>

后端的Cs文件如下：

 public partial class MainPage : UserControl
     {
         public MainPage()
         {
             InitializeComponent();
             InitlizePage();
         }

         public void InitlizePage()
         {
             #region comboBox1 最基本的绑定

             ComboBoxItem lbi = new ComboBoxItem();
             lbi.SetValue(ComboBoxItem.ContentProperty, "江苏");

             this.comboBox1.Items.Add("武汉");
             this.comboBox1.Items.Add("大连");
             this.comboBox1.Items.Add("苏州");
             this.comboBox1.Items.Add(lbi);

             this.comboBox1.SelectedItem = lbi;
             #endregion

             #region 构建了一个数据源
             List<Product> _list = new List<Product>();
             _list.Add(new Product() { ID = , Name = "产品1" });
             _list.Add(new Product() { ID = , Name = "产品2" });
             _list.Add(new Product() { ID = , Name = "产品3" });
             _list.Add(new Product() { ID = , Name = "产品4" });
             _list.Add(new Product() { ID = , Name = "产品5" });
             _list.Add(new Product() { ID = , Name = "产品6" });
             #endregion

             #region 添加数据源
             this.comboBox2.DisplayMemberPath = "Name";
             //this.comboBox2.SelectedValuePath = "ID";//没有指定Value值
             this.comboBox2.UpdateLayout();
             this.comboBox2.ItemsSource = _list;

             //进行初始化赋值，使用SelectedItem  ComboBox的数据初始化跟web中的DropDownList是不一样的
             this.comboBox2.SelectedItem = (from p in this.comboBox2.Items
                                            where (p as Product).Name == "产品4"
                                            select p).First();
             #endregion

             #region
             this.comboBox5.DisplayMemberPath = "Name";
             this.comboBox5.SelectedValuePath = "ID";//指定Value值
             this.comboBox5.UpdateLayout();
             this.comboBox5.ItemsSource = _list;

             int SelectedIndex = -;

             for(int i =;i<_list.Count;i++ )
             {
                 if (_list[i].ID == )
                 {
                     SelectedIndex = i;
                     break;
                 }
             }
             //通过SelectedIndex来进行初始化绑定
             this.comboBox5.SelectedIndex = SelectedIndex;

             #endregion 

             #region 添加自定义Item
             ComboBoxItem cbiRight = new ComboBoxItem();
             cbiRight.Background = new SolidColorBrush(Colors.Yellow);
             cbiRight.HorizontalContentAlignment = HorizontalAlignment.Right;
             cbiRight.SetValue(ComboBoxItem.ContentProperty, "上海");

             ComboBoxItem cbiCenter = new ComboBoxItem();
             cbiCenter.Background = new SolidColorBrush(Colors.Cyan);
             cbiCenter.HorizontalContentAlignment = HorizontalAlignment.Center;
             cbiCenter.SetValue(ComboBoxItem.ContentProperty, "北京");
             ComboBoxItem cbiLeft = new ComboBoxItem();
             cbiLeft.Background = new SolidColorBrush(Colors.LightGray);
             cbiLeft.HorizontalContentAlignment = HorizontalAlignment.Left;
             cbiLeft.SetValue(ComboBoxItem.ContentProperty, "深圳");

             this.comboBox3.Items.Add(cbiRight);
             this.comboBox3.Items.Add(cbiCenter);
             this.comboBox3.Items.Add(cbiLeft);

             #endregion

             Image img = new Image();
             img.Source = new BitmapImage(new Uri("img/1.png", UriKind.Relative));

             Label lbl = new Label();
             lbl.Content = "带图片的选项";

             StackPanel sp = new StackPanel();
             sp.Orientation = Orientation.Horizontal;
             sp.Children.Add(img);
             sp.Children.Add(lbl);

             ComboBoxItem multipleCmb = new ComboBoxItem();
             multipleCmb.Content = sp;
             this.comboBox4.Items.Add(multipleCmb);  

         }

         private void comboBox2_SelectionChanged(object sender, SelectionChangedEventArgs e)
         {
             Product product = (sender as ComboBox).SelectedItem as Product;
             int selectID = product.ID;
             string selectedName = product.Name;
             //MessageBox.Show(selectID.ToString() + selectedName);

             Product product2 = comboBox2.SelectedValue as Product;
             int selectedID2 = product2.ID;
             string selectedName2 = product2.Name;
             //MessageBox.Show(selectedID2.ToString() + selectedName2);
         }

         //
         private void comboBox5_SelectionChanged(object sender, SelectionChangedEventArgs e)
         {
             //MessageBox.Show(((ComboBox)sender).SelectedValue.ToString());//获取value
             //MessageBox.Show(((Product)((ComboBox)sender).SelectedItem).Name);//获取name呢？？？？
         }
     }

当然，其中我们还要构建一个Product的类:

 public class Product
     {
         public int ID { get; set; }

         public string Name { get; set; }
     }

获取选择的项的content：

 string layerName = ((sender as ComboBox).SelectedItem as ComboBoxItem).Content.ToString();