前端放置了几个ComboBox的控件。
1 <Grid x:Name="LayoutRoot" Background="White">
2 <ComboBox Height="23" HorizontalAlignment="Left" Margin="26,49,0,0" Name="comboBox1" VerticalAlignment="Top" Width="120" />
3 <ComboBox Height="23" HorizontalAlignment="Left" Margin="223,49,0,0" Name="comboBox2" VerticalAlignment="Top" Width="120" SelectionChanged="comboBox2_SelectionChanged" />
4 <ComboBox Height="23" HorizontalAlignment="Left" Margin="26,140,0,0" Name="comboBox3" VerticalAlignment="Top" Width="120" />
5 <ComboBox Height="23" HorizontalAlignment="Left" Margin="223,140,0,0" Name="comboBox4" VerticalAlignment="Top" Width="120" />
6 <ComboBox Height="23" HorizontalAlignment="Left" Margin="26,199,0,0" Name="comboBox5" VerticalAlignment="Top" Width="120" SelectionChanged="comboBox5_SelectionChanged" />
7 </Grid>
后端的Cs文件如下：
1 public partial class MainPage : UserControl
2 {
3 public MainPage()
4 {
5 InitializeComponent();
6 InitlizePage();
7 }
8
9 public void InitlizePage()
10 {
11 #region comboBox1 最基本的绑定
12
13 ComboBoxItem lbi = new ComboBoxItem();
14 lbi.SetValue(ComboBoxItem.ContentProperty, "江苏");
15
16 this.comboBox1.Items.Add("武汉");
17 this.comboBox1.Items.Add("大连");
18 this.comboBox1.Items.Add("苏州");
19 this.comboBox1.Items.Add(lbi);
20
21 this.comboBox1.SelectedItem = lbi;
22 #endregion
23
24 #region 构建了一个数据源
25 List<Product> _list = new List<Product>();
26 _list.Add(new Product() { ID = 11, Name = "产品1" });
27 _list.Add(new Product() { ID = 22, Name = "产品2" });
28 _list.Add(new Product() { ID = 33, Name = "产品3" });
29 _list.Add(new Product() { ID = 44, Name = "产品4" });
30 _list.Add(new Product() { ID = 55, Name = "产品5" });
31 _list.Add(new Product() { ID = 66, Name = "产品6" });
32 #endregion
33
34 #region 添加数据源
35 this.comboBox2.DisplayMemberPath = "Name";
36 //this.comboBox2.SelectedValuePath = "ID";//没有指定Value值
37 this.comboBox2.UpdateLayout();
38 this.comboBox2.ItemsSource = _list;
39
40 //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
41 this.comboBox2.SelectedItem = (from p in this.comboBox2.Items
42 where (p as Product).Name == "产品4"
43 select p).First();
44 #endregion
45
46 #region
47 this.comboBox5.DisplayMemberPath = "Name";
48 this.comboBox5.SelectedValuePath = "ID";//指定Value值
49 this.comboBox5.UpdateLayout();
50 this.comboBox5.ItemsSource = _list;
51
52 int SelectedIndex = -1;
53
54 for(int i =0;i<_list.Count;i++ )
55 {
56 if (_list[i].ID == 33)
57 {
58 SelectedIndex = i;
59 break;
60 }
61 }
62 //通过SelectedIndex来进行初始化绑定
63 this.comboBox5.SelectedIndex = SelectedIndex;
64
65 #endregion
66
67
68 #region 添加自定义Item
69 ComboBoxItem cbiRight = new ComboBoxItem();
70 cbiRight.Background = new SolidColorBrush(Colors.Yellow);
71 cbiRight.HorizontalContentAlignment = HorizontalAlignment.Right;
72 cbiRight.SetValue(ComboBoxItem.ContentProperty, "上海");
73
74 ComboBoxItem cbiCenter = new ComboBoxItem();
75 cbiCenter.Background = new SolidColorBrush(Colors.Cyan);
76 cbiCenter.HorizontalContentAlignment = HorizontalAlignment.Center;
77 cbiCenter.SetValue(ComboBoxItem.ContentProperty, "北京");
78 ComboBoxItem cbiLeft = new ComboBoxItem();
79 cbiLeft.Background = new SolidColorBrush(Colors.LightGray);
80 cbiLeft.HorizontalContentAlignment = HorizontalAlignment.Left;
81 cbiLeft.SetValue(ComboBoxItem.ContentProperty, "深圳");
82
83 this.comboBox3.Items.Add(cbiRight);
84 this.comboBox3.Items.Add(cbiCenter);
85 this.comboBox3.Items.Add(cbiLeft);
86
87 #endregion
88
89 Image img = new Image();
90 img.Source = new BitmapImage(new Uri("img/1.png", UriKind.Relative));
91
92 Label lbl = new Label();
93 lbl.Content = "带图片的选项";
94
95 StackPanel sp = new StackPanel();
96 sp.Orientation = Orientation.Horizontal;
97 sp.Children.Add(img);
98 sp.Children.Add(lbl);
99
100 ComboBoxItem multipleCmb = new ComboBoxItem();
101 multipleCmb.Content = sp;
102 this.comboBox4.Items.Add(multipleCmb);
103
104 }
105
106 private void comboBox2_SelectionChanged(object sender, SelectionChangedEventArgs e)
107 {
108 Product product = (sender as ComboBox).SelectedItem as Product;
109 int selectID = product.ID;
110 string selectedName = product.Name;
111 //MessageBox.Show(selectID.ToString() + selectedName);
112
113 Product product2 = comboBox2.SelectedValue as Product;
114 int selectedID2 = product2.ID;
115 string selectedName2 = product2.Name;
116 //MessageBox.Show(selectedID2.ToString() + selectedName2);
117 }
118
119 //
120 private void comboBox5_SelectionChanged(object sender, SelectionChangedEventArgs e)
121 {
122 //MessageBox.Show(((ComboBox)sender).SelectedValue.ToString());//获取value
123 //MessageBox.Show(((Product)((ComboBox)sender).SelectedItem).Name);//获取name呢？？？？
124 }
125 }
当然，其中我们还要构建一个Product的类:
1 public class Product
2 {
3 public int ID { get; set; }
4
5 public string Name { get; set; }
6 }
获取选择的项的content：
1 string layerName = ((sender as ComboBox).SelectedItem as ComboBoxItem).Content.ToString();
Silverlight中关于ComboBox的各种使用
时间： 2024-10-12 22:46:52