Silverlight中关于ComboBox的绑定使用

在前台页面添加5个ComboBox

<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" SelectionChanged="comboBox2_SelectionChanged" VerticalAlignment="Top" Width="120" />
<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" />
</Grid>

后台 代码

public partial class PathControl : UserControl

{

public PathControl()

　　 {

　　　　　　InitializeComponent();

　　 InitizePage();

}

public void InitizePage()

{

#region comboBox1 最基本的绑定

ComboBoxItem lbi = new ComboBoxItem();

lbi.SetValue(ComboBoxItem.contentproperty,"江苏");

comboBox1.Items.Add("武汉");

comboBox1.Items.Add("郑州");

comboBox1.Items.Add("苏州");

comboBox1.Items.Add(lbi);

comboBox1.SelectedItem = lbi;

#endregion

#region comboBox2 构建数据源 数据源实体必须是 public

List<books> _list = new List<books>();

_list.Add(new books() { Price = 20.0,Name = "C#" });

_list.Add(new books() { Price = 23.5,Name = "C++" });

_list.Add(new books() { Price = 10.2,Name = "MFC" });

_list.Add(new books() { Price = 15.0,Name = "SliverLight" });

_list.Add(new books() { Price = 15.5,Name = "Asp.Net" });

_list.Add(new books() { Price = 14.6,Name = "Jquery" });

_list.Add(new books() { Price = 19.0,Name = "Javascript" });

this.comboBox2.displayMemberPath = "Name";//显示字段名

this.comboBox2.UpdateLayout();

this.comboBox2.ItemsSource = _list;//添加数据源

this.comboBox2.SelectedItem = (from q in this.comboBox2.Items where (q as books).Name == "MFC" select q).FirstOrDefault();//默认选择项

#endregion

#region comboBox5

this.comboBox5.displayMemberPath = "Name";

this.comboBox5.SelectedValuePath = "Price";//指定value值

this.comboBox5.UpdateLayout();

this.comboBox5.ItemsSource = _list;

int index = -1;

for (int i = 0; i < _list.Count; i++)

{

if (_list[i].Price == 15.0)

{

index = i; break;

}

}

this.comboBox5.Selectedindex = index;//默认选择项

#endregion

#region comboBox3 自定义Item项 及样式

ComboBoxItem cbi1 = new ComboBoxItem();

cbi1.Background = new SolidColorBrush(Colors.Yellow);

cbi1.HorizontalContentAlignment = HorizontalAlignment.Left;

cbi1.SetValue(ComboBoxItem.contentproperty,"郑州");

ComboBoxItem cbi2 = new ComboBoxItem();

cbi2.Background = new SolidColorBrush(Colors.Green);

cbi2.HorizontalContentAlignment = HorizontalAlignment.Center;

cbi2.SetValue(ComboBoxItem.contentproperty,"上海");

ComboBoxItem cbi3 = new ComboBoxItem();

cbi3.Background = new SolidColorBrush(Colors.Blue);

cbi3.HorizontalContentAlignment = HorizontalAlignment.Right;

cbi3.SetValue(ComboBoxItem.contentproperty,"北京");

this.comboBox3.Items.Add(cbi1);

this.comboBox3.Items.Add(cbi2);

this.comboBox3.Items.Add(cbi3);

this.comboBox3.SelectedItem = cbi1;

#endregion

#region comboBox4 //自定义图片选项

Image img = new Image();

img.source = new BitmapImage(new Uri("1.png",UriKind.Relative));

Image img1 = new Image();

img1.source = new BitmapImage(new Uri("1.png",UriKind.Relative));

StackPanel sp = new StackPanel();

sp.Orientation = Orientation.Horizontal;

sp.Children.Add(img);

sp.Children.Add(img1);

ComboBoxItem picComboBox = new ComboBoxItem();

picComboBox.Content = sp;

this.comboBox4.Items.Add(picComboBox);

#endregion

}

private void comboBox2_SelectionChanged(object sender,SelectionChangedEventArgs e)

{

books book = (sender as ComboBox).SelectedItem as books;

MessageBox.Show(book.ToString());

}

}

public class books

{

string name;

public string Name

{

get { return name; }

set { name = value; }

}

　　　double price;

public double Price

{

get { return price; }

set { price = value; }

}

public override string ToString()//重写tostring()

{

return string.Format("书名：{0} 单价：{1}",Name,Price);

}

}