I have a single application that loads dynamicaly the three following solutions:
- SolutionA which references
X.dll version 3
Z.dll version 1 which references
X.dll version 1
- SolutionB which references
X.dll version 2
- SolutionC which references
X.dll version 1
.
X.dll contains some XAML (depending on the DLL version I change the text, the background and the foreground) :
<UserControl x:Class="X.MainWindow"
Background="DodgerBlue">
<UserControl.Content>
<Label Foreground="Black" Content="version 1" />
</UserControl.Content>
</UserControl>
.
Z.dll also contains some XAML that uses X.dll :
<UserControl x:Class="Z.ZMainWindow">
<StackPanel>
<X:MainWindow />
</StackPanel>
</UserControl>
.
SolutionA displays X version 3 and Z version 1 (which displays X version 1)
SolutionB displays X version 2
SolutionC displays X version 1
.
What I want is to always use the Higher version of the Assembly, which mean that SolutionA, SolutionB and SolutionC must always use X.dll in version 3.
Here is the code I use for AssemblyResolve:
private static Assembly OnAssemblyResolveWithDllPaths(object sender, ResolveEventArgs args)
{
try
{
AssemblyName parsedName = new AssemblyName(args.Name);
Version currentVersion = parsedName.Version;
string currentName = parsedName.Name;
string currentCulture = parsedName.CultureName;
byte[] currentPublicKeyToken = parsedName.GetPublicKeyToken();
string assemblyPath = string.Empty;
if (loadedAssemblies.FirstOrDefault(a => a == args.Name) != null)
{
// Assembly has already been loaded
return null;
}
List<string> possibleAssembliesPaths = m_dllPaths.Where(d => d.Contains(parsedName.Name)).ToList();
if (possibleAssembliesPaths != null && possibleAssembliesPaths.Count > 0)
{
if (possibleAssembliesPaths.Count == 1)
{
assemblyPath = possibleAssembliesPaths[0];
}
else
{
foreach (string possibleAssembly in possibleAssembliesPaths)
{
if (File.Exists(possibleAssembly))
{
AssemblyName possibleAssemblyName = AssemblyName.GetAssemblyName(possibleAssembly);
Version possibleVersion = possibleAssemblyName.Version;
string possibleName = possibleAssemblyName.Name;
string possibleCulture = possibleAssemblyName.CultureName;
byte[] possiblePublicKeyToken = possibleAssemblyName.GetPublicKeyToken();
if (currentName == possibleName
&& currentCulture == possibleCulture
&& currentPublicKeyToken.SequenceEqual(possiblePublicKeyToken)
&& currentVersion < possibleVersion)
{
assemblyPath = possibleAssembly;
currentVersion = possibleAssemblyName.Version;
currentName = possibleAssemblyName.Name;
currentCulture = possibleAssemblyName.CultureName;
currentPublicKeyToken = possibleAssemblyName.GetPublicKeyToken();
}
}
}
}
if (!string.IsNullOrEmpty(assemblyPath))
{
loadedAssemblies.Add(args.Name);
return Assembly.LoadFrom(assemblyPath);
}
}
}
catch
{
return null;
}
return null;
}
.
Everything works perfectly until in name my controls
i.e. (in Z.dll) : <Label Foreground="Black" Content="version 1" />
becomes <Label Foreground="Black" Content="version 1" x:Name="LabelV1" />
and (in X.dll) : <X:MainWindow x:Name="XMainWindow" />
becomes <X:MainWindow x:Name="XMainWindow" />
At this points, SolutionA has an exception and is not displayed when SolutionA is loaded before SolutionC (SolutionB is never a problem and as soon as SolutionC is loaded before SolutionA, everything works perfectly).
What I see, when I am attached to AppDomain.CurrentDomain.AssemblyLoad += CurrentDomain_AssemblyLoad
is that the XAMLs automaticaly loads the Assembly they need :
SolutionC's XAML loads X in version 1
SolutionA's XAML loads X in version 3
SolutionA's XAML loads Z in version 1
Then I see the following exception in the xaml.cs:
An exception of type 'System.Exception' occurred in PresentationFramework.dll but was not handled in user code
Additional information: The component 'X.MainWindow' does not have a resource identified by the URI '/X;component/mainwindow.xaml'.
and the following one in the xaml:
Exception thrown: 'System.Windows.Markup.XamlParseException' in PresentationFramework.dll
Additional information: 'The invocation of the constructor on type 'X.MainWindow' that matches the specified binding constraints threw an exception.' Line number '10' and line position '10'.
.
Do you have leads to avoid the issue ?