static FeatureMerger()
{
Type adoMergerType = Type.GetType("System.Data.Merger, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089");
_adoMergerTypeHandle = adoMergerType.TypeHandle;
_createMerger = generateCreateMergerDelegate();
_mergeSchema = generateMergeSchemaDelegate();
_getKeyIndex = generateGetKeyIndexDelegate();
}
private static MergeSchemaDelegate generateMergeSchemaDelegate()
{
#if !CFBuild
DynamicMethod mergeSchemaMethod = new DynamicMethod("Merger_MergeSchema",
MethodAttributes.Public | MethodAttributes.Static,
CallingConventions.Standard,
typeof(DataTable),
new Type[] { typeof(object), typeof(DataTable) },
Type.GetTypeFromHandle(_adoMergerTypeHandle),
false);
Type merger = Type.GetTypeFromHandle(_adoMergerTypeHandle);
ILGenerator il = mergeSchemaMethod.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Castclass, merger);
il.Emit(OpCodes.Ldarg_1);
MethodInfo mergeSchemaInfo = merger.GetMethod("MergeSchema",
BindingFlags.Instance | BindingFlags.NonPublic);
il.Emit(OpCodes.Call, mergeSchemaInfo);
il.Emit(OpCodes.Ret);
MergeSchemaDelegate d = (MergeSchemaDelegate)mergeSchemaMethod.CreateDelegate(typeof(MergeSchemaDelegate));
return d;
#else
MergeSchemaDelegate d = new MergeSchemaDelegate(MergeSchemaInvoker);
return d;
#endif
}
static FeatureMerger()
{
_createMerger = generateCreateMergerDelegate();
_mergeSchema = generateMergeSchemaDelegate();
_getKeyIndex = generateGetKeyIndexDelegate();
_getDataKeyColumnReference = generateGetDataKeyColumnReferenceDelegate();
_createDataKey = generateCreateDataKeyDelegate();
_createEmptyDataKey = generateCreateEmptyDataKeyDelegate();
_getDataKeyFromUniqueConstraint = generateGetDataKeyFromUniqueConstraintDelegate();
_dataKeyGetSortIndex = generateDataKeyGetSortIndexDelegate();
_getDataKeyHasValue = generateGetDataKeyHasValueDelegate();
_cloneDataColumn = generateCloneDataColumnDelegate();
}
