public void DynamicMethodFactory_CreatePropertyGetter()
{
object obj = null;
int value = 5;
PropertyInfo vo = typeof(User).GetProperties().FirstOrDefault(f => f.Name == "Age");
GetValueDelegate getValueDelegate = DynamicMethodFactory.CreatePropertyGetter(vo);
User user = new User();
user.Age = value;
if (getValueDelegate != null)
{
obj = getValueDelegate(user);
}
Assert.Equal(value, obj);
}
public static object FastGetValue(this PropertyInfo propertyInfo, object obj)
{
if (propertyInfo == null)
{
throw new ArgumentNullException(nameof(propertyInfo));
}
GetValueDelegate getter = (GetValueDelegate)GetterDic[propertyInfo];
if (getter == null)
{
getter = DynamicMethodFactory.CreatePropertyGetter(propertyInfo);
GetterDic[propertyInfo] = getter;
}
return(getter(obj));
}
public void DynamicMethodFactory_CreatePropertyGetter_VO_STRING()
{
object obj = null;
string value = "ABC";
PropertyInfo vo = typeof(User).GetProperties().FirstOrDefault(f => f.Name == "Address");
PropertyInfo property = typeof(Address).GetProperties().FirstOrDefault(f => f.Name == "Street");
GetValueDelegate getValueDelegate = DynamicMethodFactory.CreatePropertyGetter(vo, property);
User user = new User();
user.Address = new Address();
user.Address.Street = value;
if (getValueDelegate != null)
{
obj = getValueDelegate(user);
}
Assert.Equal(obj, value);
}
static string Test_GetProperty(int count)
{
StringBuilder sb = new StringBuilder(System.Runtime.InteropServices.RuntimeEnvironment.GetSystemVersion());
sb.AppendLine();
sb.AppendLine("Test_SetProperty");
OrderInfo testObj = new OrderInfo();
PropertyInfo propInfo = typeof(OrderInfo).GetProperty("OrderID");
int orderId = 0;
GetValueDelegate getter2 = DynamicMethodFactory.CreatePropertyGetter(propInfo);
sb.Append("EmitGet花费时间： ");
Stopwatch watch2 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
orderId = (int)getter2(testObj);
}
watch2.Stop();
sb.AppendLine(watch2.Elapsed.ToString());
return(sb.ToString());
}
