通常我们开发Silverlight界面都是在XAML里面定义好UI，但如何实现Silverlight界面自定义，在运行时动态生成界面？一种方法是动态加载Xaml字符串，相当于批量生成控件，另外一个方法是用代码一行一行生成每个控件。例如，我们通常定义的界面是在Xaml里面：
1: <Grid Margin="10">
2: <Grid.ColumnDefinitions>
3: <ColumnDefinition Width="100" />
4: <ColumnDefinition Width="*" />
5: </Grid.ColumnDefinitions>
6:
7: <Grid.RowDefinitions>
8: <RowDefinition Height="Auto" />
9: <RowDefinition Height="Auto" />
10: <RowDefinition Height="Auto" />
11: <RowDefinition Height="*" />
12: </Grid.RowDefinitions>
13:
14: <TextBlock Text="First Name"
15: Height="19"
16: Margin="0,7,31,4" />
17: <TextBox x:Name="FirstName"
18: Margin="3"
19: Grid.Row="0"
20: Grid.Column="1" />
21:
22: <TextBlock Text="Last Name"
23: Margin="0,7,6,3"
24: Grid.Row="1"
25: Height="20" />
26: <TextBox x:Name="LastName"
27: Margin="3"
28: Grid.Row="1"
29: Grid.Column="1" />
30:
31:
32: <TextBlock Text="Date of Birth"
33: Grid.Row="2"
34: Margin="0,9,0,0"
35: Height="21" />
36: <sdk:DatePicker x:Name="DateOfBirth"
37: Margin="3"
38: Grid.Row="2"
39: Grid.Column="1" />
40:
41:
42: <Button x:Name="SubmitChanges"
43: Grid.Row="3"
44: Grid.Column="3"
45: HorizontalAlignment="Right"
46: VerticalAlignment="Top"
47: Margin="3"
48: Width="80"
49: Height="25"
50: Content="Save" />
51: </Grid>
现在我们来动态加载Xaml字符串，相当于批量生成控件:
1: public MainPage()
2: {
3: InitializeComponent();
4:
5: Loaded += new RoutedEventHandler(MainPage_Loaded);
6: }
7:
8: void MainPage_Loaded(object sender, RoutedEventArgs e)
9: {
10: CreateControls();
11: }
12:
13:
14: private void CreateControls()
15: {
16: string xaml =
17: "<Grid Margin='10' " +
18: "xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' " +
19: "xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' " +
20: "xmlns:sdk='http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk'>" +
21: "<Grid.ColumnDefinitions>" +
22: "<ColumnDefinition Width='100' />" +
23: "<ColumnDefinition Width='*' />" +
24: "</Grid.ColumnDefinitions>" +
25:
26: "<Grid.RowDefinitions>" +
27: "<RowDefinition Height='Auto' />" +
28: "<RowDefinition Height='Auto' />" +
29: "<RowDefinition Height='Auto' />" +
30: "<RowDefinition Height='*' />" +
31: "</Grid.RowDefinitions>" +
32:
33: "<TextBlock Text='First Name' Height='19' Margin='0,7,31,4' />" +
34: "<TextBox x:Name='FirstName' Margin='3' Grid.Row='0' Grid.Column='1' />" +
35:
36: "<TextBlock Text='Last Name' Margin='0,7,6,3' Grid.Row='1' Height='20' />" +
37: "<TextBox x:Name='LastName' Margin='3' Grid.Row='1' Grid.Column='1' />" +
38:
39: "<TextBlock Text='Date of Birth' Grid.Row='2' Margin='0,9,0,0' Height='21' />" +
40: "<sdk:DatePicker x:Name='DateOfBirth' Margin='3' Grid.Row='2' Grid.Column='1' />" +
41:
42: "<Button x:Name='SubmitChanges' Grid.Row='3' Grid.Column='3' " +
43: "HorizontalAlignment='Right' VerticalAlignment='Top' " +
44: "Margin='3' Width='80' Height='25' Content='Save' />" +
45: "</Grid>";
46:
47:
48: UIElement tree = (UIElement)XamlReader.Load(xaml);
49:
50: LayoutRoot.Children.Add(tree);
51: }
第二种方法是用代码动态生成每一个Silverlight控件：
1: private void CreateControlsUsingObjects()
2: {
3: // <Grid Margin="10">
4: Grid rootGrid = new Grid();
5: rootGrid.Margin = new Thickness(10.0);
6:
7: // <Grid.ColumnDefinitions>
8: // <ColumnDefinition Width="100" /><