private static IEnumerable <AssemblyPart> GetParts(Stream stream, ModuleInfo moduleInfo)
{
List <AssemblyPart> assemblyParts = new List <AssemblyPart>();
using (var streamReader = new StreamReader(Application.GetResourceStream(
new StreamResourceInfo(stream, null),
new Uri("AppManifest.xaml", UriKind.Relative)).Stream))
{
using (XmlReader xmlReader = XmlReader.Create(streamReader))
{
xmlReader.MoveToContent();
if (xmlReader.NodeType == XmlNodeType.Element && xmlReader.Name == "Deployment")
{
string value = string.Empty, entryPointType = string.Empty;
if (string.IsNullOrEmpty(value = xmlReader.GetAttribute("EntryPointType")))
{
throw new ArgumentNullException("EntryPointType", new Exception("The EntryPointType is not found in AppManifest.xaml!"));
}
entryPointType = value + ",";
if (string.IsNullOrEmpty(value = xmlReader.GetAttribute("EntryPointAssembly")))
{
throw new ArgumentNullException("EntryPointAssembly", new Exception("The EntryPointAssembly is not found in AppManifest.xaml!"));
}
entryPointType += value;
if (moduleInfo.EntryPointType == null)
{
moduleInfo.m_entryPointType = entryPointType;
}
}
while (xmlReader.Read())
{
if (xmlReader.NodeType == XmlNodeType.Element && xmlReader.Name == "Deployment.Parts")
{
using (XmlReader xmlReaderAssemblyParts = xmlReader.ReadSubtree())
{
while (xmlReaderAssemblyParts.Read())
{
if (xmlReaderAssemblyParts.NodeType == XmlNodeType.Element && xmlReaderAssemblyParts.Name == "AssemblyPart")
{
AssemblyPart assemblyPart = new AssemblyPart();
assemblyPart.Source = xmlReaderAssemblyParts.GetAttribute("Source");
assemblyParts.Add(assemblyPart);
}
}
}
break;
}
}
}
}
return(assemblyParts);
}
private void OnLoadModule(object sender, LoadCompletedEventArgs e)
{
LoadModuleCallback callback = e.UserState as LoadModuleCallback;
if (e.Error != null)
{
ModuleInfo module = e.Request.ModuleInfo as ModuleInfo;
lock (module)
{
module.Status = ModuleStatus.Preloading;
}
module.Raise(this, e);
if (callback != null)
{
callback(this, new LoadedMoudleEventArgs(e.Request, e.Error, false, LoadModuleStatus.End, e.UserState));
}
else
{
throw new PageException(MessageResource.PageException_PageLoadFailure_Title,
MessageResource.PageException_PageLoadFailure_Message, e.Error, e.Request);
}
}
/*
* 如果发生页面初始化失败的时候，会导致再次打开这个页面的时候一直处于Loading状态
* 原因是EntryPointType可能在第一次加载的时候已经初始化，导致第二次不能进行加载；
* (By Aaron.L.Zhou)
*/
if (e.Request.ModuleInfo.Status == ModuleStatus.Loading && e.Request.ModuleInfo.EntryPointType == null)
{
//是否所有的Xap Dll都已经加载完成;
bool m_isLoaded = false;
try
{
int loadedAssemblyCount = 0;
Stream stream = e.Result;
IEnumerable <AssemblyPart> parts = GetParts(stream, e.Request.ModuleInfo as ModuleInfo);
ModuleInfo module = e.Request.ModuleInfo as ModuleInfo;
string moduleFile = (module.m_entryPointType.Split(',')[1] + ".dll").ToLower();
module.m_stream = new StreamResourceInfo(stream, "xap");
LoadModuleConfig(module.m_stream, module.m_config);
foreach (AssemblyPart item in parts)
{
LoadAssembly(stream, item, (a) =>
{
Interlocked.Increment(ref loadedAssemblyCount);
if (item.Source.ToLower() == moduleFile)
{
module.m_entryPointType = string.Format("{0},Version={1}",
module.m_entryPointType, Regex.Match(a.FullName, @"Version=(?<version>[\d.]+)").Groups["version"].Value);
}
if (parts.Count() == loadedAssemblyCount)
{
m_isLoaded = true;
loaded(e, callback);
}
});
}
}
catch (Exception ex)
{
ModuleInfo module = e.Request.ModuleInfo as ModuleInfo;
if (!m_isLoaded)
{
lock (module)
{
module.Status = ModuleStatus.Preloading;
}
}
module.Raise(this, new LoadCompletedEventArgs(e.Request, null, ex, e.Cancelled, e.UserState));
if (callback != null)
{
callback(this, new LoadedMoudleEventArgs(e.Request, ex, false, LoadModuleStatus.End, e.UserState));
}
else
{
throw new PageException(MessageResource.PageException_ModuleInitializeError_Ttitle,
MessageResource.PageException_ModuleInitializeError_Message, ex, e.Request);
}
}
}
}