将通用类T存储在变量中,然后在子方法中重用它。
对于带有少量对象的WebService:
Foo: Bar: Etc..
SetFoo SetBar SetEtc
GetFoo GetBar GetEtc
UpdateFoo UpdateBar UpdateEtc
DeleteFoo DeleteBar DeleteEtc
GetList .. ..
GetPending .. ..
Processed .. ..
我在客户端使用以下单例通用包装,方法如下:
public bool Get<T>(int i, out DloExtention result)
// DloExtention is an interface implemented by foo, bar, etc..
{
result = null;
try
{
if (typeof(T) == typeof(Foo))
{
result = WebserviceClient.GetFoo(i);
}
else if (typeof(T) == typeof(Bar))
{
result = WebserviceClient.GetBar(i);
}
else if (typeof(T) == typeof(Etc))
{
result = WebserviceClient.GetEtc(i);
}
else
{
throw new NotSupportedException("Get<T>, T is not a supported type.");
}
}
catch (Exception ex)
{
Log4N.Logger.Error($"Error in Namespace.ClientSide.Get<{nameof(T)}>(int {i} ). " + ex.Message);
return false;
}
return true;
}
所以我可以使用同一个通用对象简单地处理所有类型:
class Processor
{
HashSet<int> validOperation = new HashSet<int>();
HashSet<int> invalidOperation = new HashSet<int>();
internal void Run<T>()
{
if (Wrapper.Instance.GetListPending<T>(out int[] newEntityList) && newEntityList.Any())
{
ProcessEntities<T>(newEntityList, false);
}
}
private void ProcessEntities<T>(int[] idsEnt, bool singleMode)
{
foreach (var idEnt in idsEnt)
{
ProcessEntity<T>(idEnt, false);
}
CloseValidOperation();
RemoveInvalidOperation();
}
internal void ProcessIncident<T>(int idEnt)
{
if (Wrapper.Instance.Get<T>(idEnt, out LanDataExchangeCore.LanDataExchangeWCF.DloExtention currentEntity))
{
if (currentEntity.isValid() && currentEntity.toLocalDB())
{
validOperation.Add(idEnt);
}
else
{
invalidOperation.Add(idEnt);
}
}
}
仅Wrapper.Instance.Get<T>
和Wrapper.Instance.GetListPending<T>
需要通用参数。
但是,每一种方法都只需要使用它就能将<T>
传递到最后一个方法。
<T>
调用中的Run<T>
保存到私有变量中,以便类的内部方法可以使用它?我尝试添加一个Type myType;
,但是找不到在通用调用中使用它的方法。 Wrapper.Instance.Get<T>
Type myType; // class property
var fooWrapperGet = typeof(Wrapper).GetMethod("Get");
var fooOfMyTypeMethod = fooWrapperGet.MakeGenericMethod(new[] { myType });
//fooOfMyTypeMethod.Invoke(Wrapper.Instance , new object[] { new myType() });
// fooWrapperGet, as my wrapper is a singleton, Wrapper dont exposed Get<T>, but Wrapper.instance will expose it.
// new myType() <- do not compile.
答案 0 :(得分:2)
这对您有用吗?
private Dictionary<Type, Func<int, DloExtention>> gets =
new Dictionary<System.Type, Func<int, DloExtention>>()
{
{ typeof(Foo), WebserviceClient.GetFoo },
{ typeof(Bar), WebserviceClient.GetBar },
{ typeof(Etc), WebserviceClient.GetEtc },
};
public bool Get<T>(int i, out DloExtention result)
{
result = null;
var flag = false;
if (gets.ContainsKey(typeof(T)))
{
result = gets[typeof(T)](i);
flag = true;
}
return flag;
}
这样做的好处是您可以在运行时填充字典。