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();