protected List <T> MapRecords <T>(IDataReader reader,
int startIndex, int length, ref int totalRecordCount)
{
var recordList = new List <T>();
int ri = -startIndex;
var builder = DynamicBuilder <T> .CreateBuilder(reader);
while (reader.Read())
{
ri++;
if (ri > 0 && ri <= length)
{
var record = builder.Build(reader);
recordList.Add(record);
if (ri == length && 0 != totalRecordCount)
{
break;
}
}
}
ClearInputtedData();
totalRecordCount = 0 == totalRecordCount ? ri + startIndex : -1;
return(recordList);
}
public static DynamicBuilder <T> CreateBuilder(IDataRecord dataRecord)
{
DynamicBuilder <T> dynamicBuilder = new DynamicBuilder <T>();
DynamicMethod method = new DynamicMethod("DynamicCreate", typeof(T), new Type[] { typeof(IDataRecord) }, typeof(T), true);
ILGenerator generator = method.GetILGenerator();
LocalBuilder result = generator.DeclareLocal(typeof(T));
if (IsSingleType(typeof(T)))
{
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldc_I4, 0);
generator.Emit(OpCodes.Callvirt, getValueMethod);
generator.Emit(OpCodes.Unbox_Any, dataRecord.GetFieldType(0));
generator.Emit(OpCodes.Ret);
}
else
{
generator.Emit(OpCodes.Newobj, typeof(T).GetConstructor(Type.EmptyTypes));
generator.Emit(OpCodes.Stloc, result);
for (int i = 0; i < dataRecord.FieldCount; i++)
{
PropertyInfo propertyInfo = typeof(T).GetProperty(dataRecord.GetName(i));
Label endIfLabel = generator.DefineLabel();
if (propertyInfo != null && propertyInfo.GetSetMethod() != null)
{
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldc_I4, i);
generator.Emit(OpCodes.Callvirt, isDBNullMethod);
generator.Emit(OpCodes.Brtrue, endIfLabel);
generator.Emit(OpCodes.Ldloc, result);
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldc_I4, i);
generator.Emit(OpCodes.Callvirt, getValueMethod);
generator.Emit(OpCodes.Unbox_Any, propertyInfo.PropertyType);
generator.Emit(OpCodes.Callvirt, propertyInfo.GetSetMethod());
generator.MarkLabel(endIfLabel);
}
}
generator.Emit(OpCodes.Ldloc, result);
generator.Emit(OpCodes.Ret);
}
dynamicBuilder.handler = (Load)method.CreateDelegate(typeof(Load));
return(dynamicBuilder);
}
protected List <T> MapRecords <T>(IDataReader reader)
{
var recordList = new List <T>();
var builder = DynamicBuilder <T> .CreateBuilder(reader);
while (reader.Read())
{
var record = builder.Build(reader);
recordList.Add(record);
}
ClearInputtedData();
return(recordList);
}
