將DevExpress.Xpo.XPCollection`1轉換爲DevExpress.Xpo.XPCollection

Question

你好我需要得到兩個集合作爲XpCollections，但「cMemberInfo.GetValue（this）」帶給我類型「DevExpress.Xpo.XPCollection`1」是嗎？可能會以某種方式將其轉換爲 DevExpress.Xpo.XPCollection？

   XPCollection cColl1 = cMemberInfo.GetValue(this) as XPCollection; 
      XPCollection cColl2 = cMemberInfo.GetValue(cObject) as XPCollection; 

作爲不轉換型兩者cColl的結果都爲空

存在其中這些集合被用來

  foreach (XPMemberInfo cMemberInfo in ClassInfo.CollectionProperties) 
     { 
      XPCollection cColl1 = cMemberInfo.GetValue(this) as XPCollection; 

      XPCollection cColl2 = cMemberInfo.GetValue(cObject) as XPCollection; 

      if (cColl1 == null || cColl2 == null) { Debug.Assert(false); return false; } 
      if (cColl1.Count != cColl2.Count) { return false; } 

      for (int i = 0; i < cColl1.Count; ++i) 
      { 
       XPOBase cObj1 = cColl1[i] as XPOBase; 
       XPOBase cObj2 = cColl2[i] as XPOBase; 

       bRet &= cObj1.IsDataEqual(cObj2); 
      } 
     } 

如果我在XPCollection的情況下使用XPBaseCollection我不能的代碼全部分聲明cColl1 [i]或cColl2 [i]

Answer 1

GetValue返回一個通用的XPCollection<T>其中T是集合對象的類型。

XPCollection<MyType> cColl1 = cMemberInfo.GetValue(this) as XPBaseCollection<MyType>; 
XPCollection<MyOtherType> cColl2 = cMemberInfo.GetValue(cObject) as XPBaseCollection<MyOtherType>; 

或者你可以使用XPBaseCollection代替：

XPBaseCollection cColl1 = cMemberInfo.GetValue(this) as XPBaseCollection; 
XPBaseCollection cColl2 = cMemberInfo.GetValue(cObject) as XPBaseCollection;