DynamicInvokeXap.Xaml
1 <UserControl x:Class="Silverlight2._0.DynamicInvokeXap"
2 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="400" Height="300">
4 <Grid x:Name="LayoutRoot" Background="White">
5 <StackPanel>
6 <TextBox x:Name="LastNameSearch" Width="200" Height="25"/>
7 <Button Click="Button_Click" Content="Submit Search" Width="200" Height="25"></Button>
8 <StackPanel x:Name="Panel1"></StackPanel>
9 </StackPanel>
10 </Grid>
11 </UserControl>
动态加载加Xap代码：
1 WebClient webClient = new WebClient();
2 webClient.OpenReadCompleted +=
new OpenReadCompletedEventHandler(webClient_OpenReadCompleted);
3 webClient.OpenReadAsync(new Uri("http://localhost/Silverlight.Web/ClientBin/SilverlightAttatch.xap"),
UriKind.Relative);
有关于Uri地址：（这里有一个目录问题要注意一下）
1.如果你aspx在项目根目录，Uri("SilverlightAttatch.xap"),即可
2.如果你aspx在目录中 如：Project -- Folder -- X.aspx
建议直接用地址访问，不然会UriFormatException
new Uri("http://localhost/Silverlight.Web/ClientBin/SilverlightAttatch.xap")
再看看webClient_OpenReadCompleted事件是如何加载dll,以及相关dll调用.
Step 1: (具体相关内容参见：另附)
//加载AppManifest.xaml,把需要加载（布署）的Dll配置到Appmanifest.xaml中
String appManifest = new StreamReader(Application.GetResourceStream(
new StreamResourceInfo(e.Result, null),
new Uri("AppManifest.xaml", UriKind.Relative)
).Stream).ReadToEnd();
另附:动态加载的appmanifest.xaml内容
<Deployment xmlns="http://schemas.microsoft.com/client/2007/deployment"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
EntryPointAssembly="SilverlightAttatch" EntryPointType="SilverlightAttatch.App"
RuntimeVersion="2.0.31005.0">
<Deployment.Parts>
<AssemblyPart x:Name="SilverlightAttatch" Source="SilverlightAttatch.dll" />
<AssemblyPart x:Name="System.Windows.Controls.Data" Source="System.Windows.Controls.Data.dll" />
<AssemblyPart x:Name="System.Windows.Controls" Source="System.Windows.Controls.dll" />
</Deployment.Parts>
</Deployment>
Step 2:
转换一下对象（XElement），不然就不能直接应用于Linq To Xml进行查询
XElement deploy = XDocument.Parse(appManifest).Root;
List<XElement> parts = ( from assemblyParts in deploy.Elements().Elements()
select assemblyParts
).ToList();
Step 3:
这里对appmanifest.xaml中的进行一下loop
目的：1.是SilverlightAttatch.dll作为Assembly进行处理，直接load
2.对于其他dll作为assembly的一些reference，直接进行AssemblyPart的load
Assembly assebmly = null;
foreach (XElement xe in parts) {
String source = xe.Attribute("Source").Value;
AssemblyPart asmPart = new AssemblyPart();
StreamResourceInfo streamInfo = Application.GetResourceStream(
new StreamResourceInfo(e.Result, "application/binary"),
new Uri(source, UriKind.Relative));
if (source.Equals("SilverlightAttatch.dll")){
assebmly = asmPart.Load(streamInfo.Stream);
}
else{
asmPart.Load(streamInfo.Stream);
}
}
Step 4:
到数据源的查询，并返回数据到UI容器
Panel1.DataContext = DynDataSource.GetCustomerInfos(LastNameSearch.Text);
创建一个UserControl实例
UIElement element = assebmly.CreateInstance("SilverlightAttatch.Page") as UIElement;
加载相应的Silverlight's UserControl
Panel1.Children.Add(element);
更新UI
Panel1.UpdateLayout();
Step 5:
1
相关数据源类
2
public class DynDataSource{
3
public static List<CustomerInfo> GetCustomerInfos(String name)
4
{
5
List<CustomerInfo> custs = GetAllCustomerInfos();
6
7
var query = from c in custs
8
where name.ToUpper().StartsWith(c.Name)
9
select c;
10
11
return query.ToList();
12
}
13
14
internal static List<CustomerInfo> GetAllCustomerInfos()
15
{
16
List<CustomerInfo> customerInfos = new List<CustomerInfo>();
17
{
18
customerInfos.Add(new CustomerInfo { ID = 1, Name = "AAA" });
19
customerInfos.Add(new CustomerInfo { ID = 2, Name = "BBB" });
20
customerInfos.Add(new CustomerInfo { ID = 3, Name = "CCC" });
21
customerInfos.Add(new CustomerInfo { ID = 4, Name = "DDD" });
22
customerInfos.Add(new CustomerInfo { ID = 5, Name = "EEE" });
23
customerInfos.Add(new CustomerInfo { ID = 6, Name = "FFF" });
24
customerInfos.Add(new CustomerInfo { ID = 7, Name = "GGG" });
25
}
26
return customerInfos;
27
}
28
}
29
30
public class CustomerInfo
31
{
32
public int ID { get; set; }
33
public String Name { get; set; }
34
}
Step 6:(需要加载的Xap包中Page.xaml)
1 <UserControl x:Class="SilverlightAttatch.Page"
2 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
4 xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data">
5 <Grid x:Name="LayoutRoot" Background="White">
6 <data:DataGrid x:Name="SearchResults" AutoGenerateColumns="True" ItemsSource="{Binding}">
</data:DataGrid>
7 </Grid>
8 </UserControl>
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