public static Func <IDataReader, object> GetInitModelByReader(Type type, IDataReader reader)
{
Type[] parameterTypes = new Type[] { typeof(IDataReader) };
DynamicMethod method = new DynamicMethod(string.Format("Deserialize{0}", Guid.NewGuid()), typeof(object), parameterTypes, true);
ILGenerator iLGenerator = method.GetILGenerator();
iLGenerator.DeclareLocal(typeof(int));
iLGenerator.DeclareLocal(type);
iLGenerator.Emit(OpCodes.Ldc_I4_0);
iLGenerator.Emit(OpCodes.Stloc_0);
DataMap dataMap = Metadata.GetDataMap(type);
string[] names = (from i in Enumerable.Range(0, reader.FieldCount) select reader.GetName(i))
.Where(e => e != "RN" && (dataMap._properties.Where(p => p.Name == e).Count() > 0 ||
dataMap._columnAttributes.Where(p => p.columnName == e).Count() > 0)).Distinct().ToArray <string>();
ConstructorInfo info = dataMap.FindConstructor();
iLGenerator.Emit(OpCodes.Newobj, info);
iLGenerator.Emit(OpCodes.Stloc_1);
iLGenerator.BeginExceptionBlock();
int num = 0;
int localIndex = iLGenerator.DeclareLocal(typeof(object)).LocalIndex;
foreach (ColumnMap map in (from n in names select dataMap.GetMember(n)).ToList <ColumnMap>())
{
//var labelElse = iLGenerator.DefineLabel();
//var labelEnd = iLGenerator.DefineLabel();
iLGenerator.Emit(OpCodes.Ldarg_0);//加载reader
iLGenerator.Emit(OpCodes.Ldstr, map.MemberName);
MethodInfo getValueMethod = typeof(IDataRecord).GetMethod("get_Item", new[] { typeof(string) });
iLGenerator.Emit(OpCodes.Callvirt, getValueMethod);
iLGenerator.Emit(OpCodes.Stloc, (short)localIndex);
iLGenerator.Emit(OpCodes.Ldloc_1);//压入对象
iLGenerator.Emit(OpCodes.Ldloc, localIndex);
iLGenerator.Emit(OpCodes.Dup);
Label notNullLabel = iLGenerator.DefineLabel();
iLGenerator.Emit(OpCodes.Isinst, typeof(DBNull)); //是1，否0
iLGenerator.Emit(OpCodes.Brfalse_S, notNullLabel); //如果非空、非0则控制权转到label
iLGenerator.Emit(OpCodes.Pop);
iLGenerator.Emit(OpCodes.Ldstr, "0");
iLGenerator.Emit(OpCodes.Stloc, localIndex);
iLGenerator.Emit(OpCodes.Ldloc, localIndex);
iLGenerator.Emit(OpCodes.Br_S, notNullLabel);
iLGenerator.MarkLabel(notNullLabel);
iLGenerator.Emit(OpCodes.Call, typeof(Convert).GetMethod(typeMap[map.MemberType], new Type[] { typeof(object) }));
iLGenerator.Emit(OpCodes.Callvirt, map.SetMethodInfo);
num++;
}
iLGenerator.BeginCatchBlock(typeof(Exception));
iLGenerator.EmitCall(OpCodes.Call, typeof(Check).GetMethod("ThrowDataException"), null);
iLGenerator.EndExceptionBlock();
//iLGenerator.Emit(OpCodes.Ldloc, localIndex);
iLGenerator.Emit(OpCodes.Ldloc_1);
iLGenerator.Emit(OpCodes.Ret);
return((Func <IDataReader, object>)method.CreateDelegate(typeof(Func <IDataReader, object>)));
}
private static Func <object, string> CreateInsertMethodImpl(object model)
{
Type type = model.GetType();
DynamicMethod method = new DynamicMethod(string.Format("Update{0}", Guid.NewGuid()), typeof(string), new Type[] { typeof(object) }, true);
var iLGenerator = method.GetILGenerator();
iLGenerator.DeclareLocal(typeof(StringBuilder));
iLGenerator.Emit(OpCodes.Newobj, typeof(StringBuilder).GetConstructor(new Type[] { }));
iLGenerator.Emit(OpCodes.Stloc_0);
iLGenerator.DeclareLocal(typeof(StringBuilder));
iLGenerator.Emit(OpCodes.Newobj, typeof(StringBuilder).GetConstructor(new Type[] { }));
iLGenerator.Emit(OpCodes.Stloc_1);
DataMap map = Metadata.GetDataMap(model.GetType());
iLGenerator.BeginExceptionBlock();
var indexlocal = iLGenerator.DeclareLocal(typeof(string));
var indexlocalInt32 = iLGenerator.DeclareLocal(typeof(Int32));
var indexlocalSecond = iLGenerator.DeclareLocal(typeof(string));
foreach (ColumnMap item in (from p in map._properties select(map.GetMember(p.Name))))
{
if (!item.isAutoIncrement)
{
iLGenerator.Emit(OpCodes.Ldarg_0);
iLGenerator.Emit(OpCodes.Unbox_Any, type);
iLGenerator.Emit(OpCodes.Callvirt, item.GetMethodInfo);
if (item.MemberType == typeof(Int32))
{
iLGenerator.Emit(OpCodes.Stloc, indexlocalInt32);
iLGenerator.Emit(OpCodes.Ldloca_S, indexlocalInt32);
}
if (item.MemberType == typeof(Boolean))
{
iLGenerator.Emit(OpCodes.Call, typeof(Convert).GetMethod("ToInt32", new Type[] { typeof(Boolean) }));
iLGenerator.Emit(OpCodes.Stloc, indexlocalInt32);
iLGenerator.Emit(OpCodes.Ldloca_S, indexlocalInt32);
}
if (item.MemberType == typeof(Boolean))
{
iLGenerator.Emit(OpCodes.Call, typeof(Int32).GetMethod("ToString", new Type[] { }));
}
else
{
iLGenerator.Emit(OpCodes.Call, item.MemberType.GetMethod("ToString", new Type[] { }));
}
iLGenerator.Emit(OpCodes.Stloc, indexlocal);
iLGenerator.Emit(OpCodes.Ldstr, CreateFormatParamByType(item.MemberType));
iLGenerator.Emit(OpCodes.Ldloc, indexlocal);
iLGenerator.Emit(OpCodes.Call, typeof(string).GetMethod("Format", new Type[] { typeof(string), item.MemberType }));
iLGenerator.Emit(OpCodes.Stloc, indexlocal);
iLGenerator.Emit(OpCodes.Ldloc_0);
iLGenerator.Emit(OpCodes.Ldloc, indexlocal);
iLGenerator.Emit(OpCodes.Callvirt, typeof(StringBuilder).GetMethod("Append", new Type[] { typeof(string) }));
iLGenerator.Emit(OpCodes.Stloc_0);
iLGenerator.Emit(OpCodes.Ldstr, "{0},");
iLGenerator.Emit(OpCodes.Ldstr, item.MemberName);
iLGenerator.Emit(OpCodes.Call, typeof(string).GetMethod("Format", new Type[] { typeof(string), item.MemberType }));
iLGenerator.Emit(OpCodes.Stloc, indexlocalSecond);
iLGenerator.Emit(OpCodes.Ldloc_1);
iLGenerator.Emit(OpCodes.Ldloc, indexlocalSecond);
iLGenerator.Emit(OpCodes.Callvirt, typeof(StringBuilder).GetMethod("Append", new Type[] { typeof(string) }));
iLGenerator.Emit(OpCodes.Stloc_1);
}
}
iLGenerator.BeginCatchBlock(typeof(Exception));
iLGenerator.EmitCall(OpCodes.Call, typeof(Check).GetMethod("ThrowDataException"), null);
iLGenerator.EndExceptionBlock();
iLGenerator.Emit(OpCodes.Ldloc_0);
iLGenerator.Emit(OpCodes.Callvirt, typeof(StringBuilder).GetMethod("ToString", new Type[] { }));
iLGenerator.Emit(OpCodes.Call, typeof(SqlMapper).GetMethod("RemoveComma", new Type[] { typeof(string) }));
iLGenerator.Emit(OpCodes.Stloc, indexlocal);
iLGenerator.Emit(OpCodes.Ldloc_1);
iLGenerator.Emit(OpCodes.Callvirt, typeof(StringBuilder).GetMethod("ToString", new Type[] { }));
iLGenerator.Emit(OpCodes.Call, typeof(SqlMapper).GetMethod("RemoveComma", new Type[] { typeof(string) }));
iLGenerator.Emit(OpCodes.Stloc, indexlocalSecond);
iLGenerator.Emit(OpCodes.Ldstr, "INSERT INTO {0} ({1}) VALUES ({2})");
iLGenerator.Emit(OpCodes.Ldstr, map.tableName);
iLGenerator.Emit(OpCodes.Ldloc, indexlocalSecond);
iLGenerator.Emit(OpCodes.Ldloc, indexlocal);
iLGenerator.Emit(OpCodes.Call, typeof(string).GetMethod("Format", new Type[] { typeof(string), typeof(string), typeof(string), typeof(string) }));
iLGenerator.Emit(OpCodes.Ret);
return((Func <object, string>)method.CreateDelegate(typeof(Func <object, string>)));
}
public static Func <object, string> CreateUpdateSqlMethodImpl(object model)
{
Type type = model.GetType();
DynamicMethod method = new DynamicMethod(string.Format("Update{0}", Guid.NewGuid()), typeof(string), new Type[] { typeof(object) }, true);
var iLGenerator = method.GetILGenerator();
iLGenerator.DeclareLocal(typeof(StringBuilder));
iLGenerator.Emit(OpCodes.Newobj, typeof(StringBuilder).GetConstructor(new Type[] { }));
iLGenerator.Emit(OpCodes.Stloc_0);
DataMap map = Metadata.GetDataMap(model.GetType());
iLGenerator.Emit(OpCodes.Ldloc_0);
iLGenerator.Emit(OpCodes.Ldstr, "update " + map.tableName + " set ");
iLGenerator.Emit(OpCodes.Callvirt, typeof(StringBuilder).GetMethod("Append", new Type[] { typeof(string) }));
iLGenerator.Emit(OpCodes.Stloc_0);
iLGenerator.BeginExceptionBlock();
var indexlocal = iLGenerator.DeclareLocal(typeof(string));
var indexlocalInt32 = iLGenerator.DeclareLocal(typeof(Int32));
foreach (ColumnMap item in (from p in map._properties select(map.GetMember(p.Name))))
{
if (!item.isPrimaryKey)
{
iLGenerator.Emit(OpCodes.Ldarg_0);
iLGenerator.Emit(OpCodes.Unbox_Any, type);
iLGenerator.Emit(OpCodes.Callvirt, item.GetMethodInfo);
if (item.MemberType == typeof(Int32))
{
iLGenerator.Emit(OpCodes.Stloc, indexlocalInt32);
iLGenerator.Emit(OpCodes.Ldloca_S, indexlocalInt32);
}
if (item.MemberType == typeof(Boolean))
{
iLGenerator.Emit(OpCodes.Call, typeof(Convert).GetMethod("ToInt32", new Type[] { typeof(Boolean) }));
iLGenerator.Emit(OpCodes.Stloc, indexlocalInt32);
iLGenerator.Emit(OpCodes.Ldloca_S, indexlocalInt32);
}
if (item.MemberType == typeof(Boolean))
{
iLGenerator.Emit(OpCodes.Call, typeof(Int32).GetMethod("ToString", new Type[] { }));
}
else
{
iLGenerator.Emit(OpCodes.Call, item.MemberType.GetMethod("ToString", new Type[] { }));
}
iLGenerator.Emit(OpCodes.Stloc, indexlocal);
iLGenerator.Emit(OpCodes.Ldstr, item.MemberName + (item.MemberType == typeof(Int32) || item.MemberType == typeof(Boolean)?"=":"='"));
iLGenerator.Emit(OpCodes.Ldloc, indexlocal);
iLGenerator.Emit(OpCodes.Ldstr, item.MemberType == typeof(Int32) || item.MemberType == typeof(Boolean)?",":"',");
iLGenerator.Emit(OpCodes.Call, typeof(string).GetMethod("Concat", new Type[] { typeof(object), typeof(object), typeof(object) }));
iLGenerator.Emit(OpCodes.Stloc, indexlocal);
iLGenerator.Emit(OpCodes.Ldloc_0);
iLGenerator.Emit(OpCodes.Ldloc, indexlocal);
iLGenerator.Emit(OpCodes.Callvirt, typeof(StringBuilder).GetMethod("Append", new Type[] { typeof(string) }));
iLGenerator.Emit(OpCodes.Stloc_0);
}
}
iLGenerator.BeginCatchBlock(typeof(Exception));
iLGenerator.EmitCall(OpCodes.Call, typeof(Check).GetMethod("ThrowDataException"), null);
iLGenerator.EndExceptionBlock();
iLGenerator.Emit(OpCodes.Ldloc_0);
iLGenerator.Emit(OpCodes.Callvirt, typeof(StringBuilder).GetMethod("ToString", new Type[] { }));
iLGenerator.Emit(OpCodes.Call, typeof(SqlMapper).GetMethod("RemoveComma", new Type[] { typeof(string) }));
iLGenerator.Emit(OpCodes.Ret);
return((Func <object, string>)method.CreateDelegate(typeof(Func <object, string>)));
}
