向通用列表中添加项<与反思

编辑:请移开，这里没什么可看的

这个问题的解决方案与反射无关，而与我没有注意到基类中collection属性的实现有关。

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我试图添加一个项目到一个集合使用反射使用以下方法:

public void AddReferenceToCollection(object targetResource, string propertyName, object resourceToBeAdded)
{
    Type targetResourceType = targetResource.GetType();
    PropertyInfo collectionPropertyInfo = targetResourceType.GetProperty(propertyName);
    // This seems to get a copy of the collection property and not a reference to the actual property
    object collectionPropertyObject = collectionPropertyInfo.GetValue(targetResource, null);
    Type collectionPropertyType = collectionPropertyObject.GetType();
    MethodInfo addMethod = collectionPropertyType.GetMethod("Add");
    if (addMethod != null)
    {
        // The following works correctly (there is now one more item in the collection), but collectionPropertyObject.Count != targetResource.propertyName.Count
        collectionPropertyType.InvokeMember("Add", System.Reflection.BindingFlags.InvokeMethod, null, collectionPropertyObject, new[] { resourceToBeAdded });
    }
    else
    {
        throw new NotImplementedException(propertyName + " has no 'Add' method");
    }
}

然而，似乎对targetResource.GetType().GetProperty(propertyName).GetValue(targetResource, null)的调用返回了targetResource.propertyName的副本而不是对它的引用，因此随后对collectionPropertyType.InvokeMember的调用影响了副本而不是引用。

如何将resourceToBeAdded对象添加到targetResource对象的propertyName集合属性中?

public void AddReferenceToCollection(object targetResource, string propertyName, object resourceToBeAdded)
{
    var col = targetResource.GetType().GetProperty(propertyName).GetValue(targetResource, null) as IList;
    if(col != null)
        col.Add(resourceToBeAdded);
    else
        throw new InvalidOperationException("Not a list");
}

void Main()
{
    var t = new Test();
    t.Items.Count.Dump(); //Gives 1
    AddReferenceToCollection(t, "Items", "testItem");
    t.Items.Count.Dump(); //Gives 2
}
public class Test
{
    public IList<string> Items { get; set; }
    public Test()
    {
        Items = new List<string>();
        Items.Add("ITem");
    }
}