public static DataTableBuilder <T> CreateBuilder(DataRow dataRecord)
{
var generator = new DynamicMethod("DynamicCreateEntity", typeof(T), new[]
{
typeof(DataRow)
}, typeof(T), true).GetILGenerator();
var result = generator.DeclareLocal(typeof(T));
generator.Emit(OpCodes.Newobj, typeof(T).GetConstructor(Type.EmptyTypes));
generator.Emit(OpCodes.Stloc, result);
for (int i = 0; i < dataRecord.ItemArray.Length; i++)
{
var propertyInfo = typeof(T).GetProperty(dataRecord.Table.Columns[i].ColumnName);
var endIfLabel = generator.DefineLabel();
if (propertyInfo == null || propertyInfo.GetSetMethod() == null)
{
continue;
}
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);
return(new DataTableBuilder <T>
{
_handler = (Load) new DynamicMethod("DynamicCreateEntity", typeof(T), new[] { typeof(DataRow) }, typeof(T), true).CreateDelegate(typeof(Load))
});
}
