Silverlight中关于ComboBox的各种使用（基本上是汇总了往上的一些方法）

概述前端放置了几个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" />

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" name="comboBox1" VerticalAlignment="top" WIDth="120" />        <ComboBox Height="23" HorizontalAlignment="left" margin="223,0" name="comboBox2" VerticalAlignment="top" WIDth="120" SelectionChanged="comboBox2_SelectionChanged" />        <ComboBox Height="23" HorizontalAlignment="left" margin="26,140,0" name="comboBox3" VerticalAlignment="top" WIDth="120" />        <ComboBox Height="23" HorizontalAlignment="left" margin="223,0" name="comboBox4" VerticalAlignment="top" WIDth="120" />        <ComboBox Height="23" HorizontalAlignment="left" margin="26,199,0" 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 = 11,name = "产品1" });            _List.Add(new Product() { ID = 22,name = "产品2" });            _List.Add(new Product() { ID = 33,name = "产品3" });            _List.Add(new Product() { ID = 44,name = "产品4" });            _List.Add(new Product() { ID = 55,name = "产品5" });            _List.Add(new Product() { ID = 66,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 = -1;            for(int i =0;i<_List.Count;i++ )            {                if (_List[i].ID == 33)                {                    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; }    }

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