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 CreateMergerDelegate generateCreateMergerDelegate()
{
#if !CFBuild
Type[] ctorParams = new Type[] { typeof(DataTable), typeof(bool), typeof(MissingSchemaAction) };
DynamicMethod createMergerMethod = new DynamicMethod("Merger_Create",
MethodAttributes.Public | MethodAttributes.Static,
CallingConventions.Standard,
typeof(Object),
ctorParams,
Type.GetTypeFromHandle(_adoMergerTypeHandle),
false);
Type adoMergerType = Type.GetTypeFromHandle(_adoMergerTypeHandle);
ILGenerator il = createMergerMethod.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldarg_2);
ConstructorInfo ctor = adoMergerType
.GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, null, ctorParams, null);
il.Emit(OpCodes.Newobj, ctor);
il.Emit(OpCodes.Isinst, typeof(Object));
il.Emit(OpCodes.Ret);
CreateMergerDelegate d = (CreateMergerDelegate)createMergerMethod.CreateDelegate(typeof(CreateMergerDelegate));
return d;
#else
CreateMergerDelegate d = new CreateMergerDelegate(CreateMergerInvoker);
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();
}
