将DevExpress.Xpo.XPCollection`1转换为DevExpress.Xpo.XPCollection

Question

你好，我需要获取两个集合作为XpCollections，但是"cMemberInfo.GetValue(this)“给我的类型是"DevExpress.Xpo.XPCollection`1”，有没有可能以某种方式将它转换为DevExpress.Xpo.XPCollection？

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

由于不转换类型，因此两个cColl都为空

使用这些集合的地方有完整的代码部分

            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);
            }
        }

如果在XPCollection中使用XPBaseCollection，则不能声明cColl1i或cColl2i

Answer 1

GetValue返回一个泛型XPCollection<T>，其中T是集合对象的类型。

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

或者，您可以改用XPBaseCollection：

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