public ICollection <object> DoTheMagic()
{
Dictionary <string, object> product = new Dictionary <string, object>();
product["ProductGuid"] = "Product Id";
product["ProductName"] = "Product Name";
Populator <ProductTest> builder = Populator <ProductTest> .CreateBuilder(product);
ProductTest obj = builder.Build(product);
return(null);
}
public static Populator <T> CreateBuilder(Dictionary <string, object> properties)
{
//private static readonly MethodInfo getValueMethod = typeof(IDataRecord).GetMethod("get_Item", new [] { typeof(int) });
//private static readonly MethodInfo isDBNullMethod = typeof(IDataRecord).GetMethod("IsDBNull", new [] { typeof(int) });
Populator <T> dynamicBuilder = new Populator <T>();
DynamicMethod method = new DynamicMethod("Create", typeof(T), new[] { typeof(Dictionary <string, object>) }, typeof(T), true);
ILGenerator generator = method.GetILGenerator();
LocalBuilder result = generator.DeclareLocal(typeof(T));
generator.Emit(OpCodes.Newobj, typeof(T).GetConstructor(Type.EmptyTypes));
generator.Emit(OpCodes.Stloc, result);
int i = 0;
foreach (var property in properties)
{
PropertyInfo propertyInfo = typeof(T).GetProperty(property.Key, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase | BindingFlags.FlattenHierarchy | BindingFlags.Default);
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, property.Value.GetType());
generator.Emit(OpCodes.Callvirt, propertyInfo.GetSetMethod());
generator.MarkLabel(endIfLabel);
}
i++;
}
generator.Emit(OpCodes.Ldloc, result);
generator.Emit(OpCodes.Ret);
dynamicBuilder._handler = (Load)method.CreateDelegate(typeof(Load));
return(dynamicBuilder);
}
