Hack for Allowing Plugins to load with ProxyType Definitions

MscrmTools · Aug 12, 2016 · b81e1da · b81e1da
1 parent 3071130
commit b81e1da
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Showing 3 changed files with 59 additions and 2 deletions.
diff --git a/XrmToolBox/AppDomainProxyTypeHack.cs b/XrmToolBox/AppDomainProxyTypeHack.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Linq;
+using System.Reflection;
+
+namespace XrmToolBox
+{
+    /// <summary>
+    /// This class/hack was created to address issues with the Xrm Sdk not allowing the earlybound type assembly to be specified.
+    /// https://github.com/MscrmTools/XrmToolBox/issues/353
+    /// </summary>
+    internal class AppDomainProxyTypeHack
+    {
+        public static void OverrideAppDomainKnownTypeInitialization()
+        {
+            InvokeAddingOfAssemblyLoadEventHandler();
+            RemoveAssemblyLoadEventHandler();
+        }
+
+        private static void InvokeAddingOfAssemblyLoadEventHandler()
+        {
+            var proxyTypesProvider = typeof(Microsoft.Xrm.Sdk.IOrganizationService).Assembly.GetType("Microsoft.Xrm.Sdk.KnownProxyTypesProvider");
+            if (proxyTypesProvider == null)
+            {
+                throw new Exception("AppDomainProxyTypeHack expected Microsoft.Xrm.Sdk.KnownProxyTypesProvider to exist in the same assembly as Microsoft.Xrm.Sdk.IOrganizationService, but it wasn't found!");
+            }
+            var getInstance = proxyTypesProvider.GetMethod("GetInstance", BindingFlags.NonPublic | BindingFlags.Static);
+            if (getInstance == null)
+            {
+                throw new Exception("AppDomainProxyTypeHack expected Microsoft.Xrm.Sdk.KnownProxyTypesProvider to contain a GetInstance(bool) method, but it wasn't found!");
+            }
+            getInstance.Invoke(null, BindingFlags.Static, null, new object[] { false }, null);
+        }
+
+        private static void RemoveAssemblyLoadEventHandler()
+        {
+            var assemblyLoadField = AppDomain.CurrentDomain.GetType().GetField("AssemblyLoad", BindingFlags.Instance | BindingFlags.NonPublic);
+            if (assemblyLoadField == null)
+            {
+                throw new Exception("AppDomainProxyTypeHack expected AppDomain to contain an AssemblyLoad field, and none was found!");
+            }
+
+            var listOfDelegates = (AssemblyLoadEventHandler) assemblyLoadField.GetValue(AppDomain.CurrentDomain);
+            if (listOfDelegates == null)
+            {
+                throw new Exception("AppDomainProxyTypeHack expected Microsoft.Xrm.Sdk.KnownProxyTypesProvider.GetInstance(false) to add an Event handler to the AssemblyLoad Event, and none was found!");
+            }
+            var first = listOfDelegates.GetInvocationList().FirstOrDefault(i => i.Target.GetType().FullName == "Microsoft.Xrm.Sdk.AppDomainBasedKnownProxyTypesProvider");
+            if (first == null)
+            {
+                throw new Exception("AppDomainProxyTypeHack expected Microsoft.Xrm.Sdk.KnownProxyTypesProvider.GetInstance(false) to add an Event handler of type Microsoft.Xrm.Sdk.AppDomainBasedKnownProxyTypesProvider to the AssemblyLoad Event, but none was found!");
+            }
+            // Remove Event Handler
+            AppDomain.CurrentDomain.AssemblyLoad -= (AssemblyLoadEventHandler) first;
+        }
+    }
+}
diff --git a/XrmToolBox/Program.cs b/XrmToolBox/Program.cs
@@ -115,7 +115,7 @@ private static void Main(string[] args)
                 }
 
                 SearchAndDestroyPluginsInRootFolder();
-
+                AppDomainProxyTypeHack.OverrideAppDomainKnownTypeInitialization();
                 CopyUpdatedPlugins();
 
                 Application.EnableVisualStyles();

diff --git a/XrmToolBox/XrmToolBox.csproj b/XrmToolBox/XrmToolBox.csproj
@@ -193,6 +193,7 @@
     <Compile Include="AppCode\PluginControlStatus.cs" />
     <Compile Include="AppCode\PluginUpdates.cs" />
     <Compile Include="AppCode\WebProxyHelper.cs" />
+    <Compile Include="AppDomainProxyTypeHack.cs" />
     <Compile Include="ConnectionParameterInfo.cs" />
     <Compile Include="Forms\NewVersionForm.cs">
       <SubType>Form</SubType>
@@ -339,7 +340,7 @@
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <ProjectExtensions>
     <VisualStudio>
-      <UserProperties BuildVersion_UpdateFileVersion="True" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_BuildVersioningStyle="None.YearStamp.MonthStamp.DayStamp" BuildVersion_ConfigurationName="Release" />
+      <UserProperties BuildVersion_ConfigurationName="Release" BuildVersion_BuildVersioningStyle="None.YearStamp.MonthStamp.DayStamp" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_UpdateFileVersion="True" />
     </VisualStudio>
   </ProjectExtensions>
   <PropertyGroup>