Why would type ever be null within this loop?
public List<string> GetTypes(string asmFile)
{
Assembly asm = this.LoadAssemblyForViewFrom(asmFile);
List<string> ret = new List<string>();
// here go the types that could be loaded
foreach (Type type in asm.GetTypes())
{
if (type != null)
ret.Add(type.FullName);
}
return ret;
}
-----Original Message-----
From: Discussion of advanced .NET topics.
[mailto:[EMAIL PROTECTED] On Behalf Of Graeme Taylor
Sent: Wednesday, November 14, 2007 6:10 AM
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Reflection: Get list of types without
loading assembly
OK - the solution (possibly not the most performant - but this is a UI
for support staff!).
[code]
public class AssemblyViewer : MarshalByRefObject
{
#region Constructor
public AssemblyViewer()
{
_dumbAssemblies = new Dictionary<string, AssemblyBuilder>();
}
#endregion
#region Methods
public List<string> GetTypes(string asmFile)
{
Assembly asm = this.LoadAssemblyForViewFrom(asmFile);
List<string> ret = new List<string>();
// here go the types that could be loaded
foreach (Type type in asm.GetTypes())
{
if (type != null)
ret.Add(type.FullName);
}
return ret;
}
#endregion
#region Event handlers
private Assembly CurrentDomain_AssemblyResolve(object sender,
ResolveEventArgs args)
{
AssemblyBuilder ab =
AppDomain.CurrentDomain.DefineDynamicAssembly(new
AssemblyName(args.Name), AssemblyBuilderAccess.Run);
_dumbAssemblies.Add(args.Name, ab);
return ab;
}
#endregion
#region Supplementary
private void GenerateDumbType(string asm, string typeName)
{
AssemblyBuilder ab;
if (_dumbAssemblies.TryGetValue(asm, out ab))
{
ModuleBuilder module = ab.GetDynamicModule(asm);
if (module == null)
module = ab.DefineDynamicModule(asm);
TypeBuilder tb = module.DefineType(typeName,
TypeAttributes.Public);
tb.CreateType();
}
}
private Assembly LoadAssemblyForViewFrom(string asmFile)
{
Assembly asm = Assembly.LoadFrom(asmFile);
AppDomain.CurrentDomain.AssemblyResolve += new
ResolveEventHandler(CurrentDomain_AssemblyResolve);
try
{
asm.GetTypes();
}
catch (ReflectionTypeLoadException e)
{
// here are the unresolved ones
if (e.LoaderExceptions != null)
{
foreach (TypeLoadException exc in
e.LoaderExceptions)
{
string missedAsmName = (string)typeof
(TypeLoadException).GetField("AssemblyName", BindingFlags.Instance |
BindingFlags.NonPublic).GetValue(exc);
GenerateDumbType(missedAsmName, exc.TypeName);
}
}
}
finally
{
AppDomain.CurrentDomain.AssemblyResolve -= new
ResolveEventHandler(CurrentDomain_AssemblyResolve);
}
return asm;
}
#endregion
#region Fields
private Dictionary<string, AssemblyBuilder> _dumbAssemblies;
#endregion
}
[/code]
Useage of this (from main application):
[code]
string filename = @"c:\stagingDir\MyPlugin.dll";
AppDomain app2 = AppDomain.CreateDomain("Resolver");
AssemblyViewer ins = (AssemblyViewer)
app2.CreateInstanceAndUnwrap ("ReflectingNoDependencies",
"ReflectingNoDependencies.AssemblyViewer");
List<string> types = ins.GetTypes(filename);
foreach (string s in types)
{
Console.WriteLine(s);
}
AppDomain.Unload(app2);
[/code]
and there we have it.
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