/// <summary>
/// 创建带有层级结构的内容项。
/// </summary>
/// <param name="reader">数据读取器。</param>
/// <returns>创建结果。</returns>
protected OutputContentObject CreateContentItem(DbDataReader reader)
{
var content = new OutputContentObject();
if (!IsEmpty(reader))
{
var complexs = new object[Metadata.ComplexMembers.Count];
foreach (var item in Children.OfType <ComplexOutputInfo>())
{
if (item.Type == EOutputType.Object)
{
var objectInfo = (ObjectOutputInfo)item;
if (item.HasCollectionProperty)
{
if (!item.IsEmpty(reader))
{//如果数据为空，则不创建成员对象
var subcontent = item.CreateContentItem(reader);
content.Members.Add(objectInfo, subcontent);
complexs[item.Index] = subcontent.Content;
}
}
else
{
complexs[item.Index] = objectInfo.CreateObjectItem(reader);
}
}
else
{
var collectionItem = (CollectionOutputInfo)item;
var collectionInstance = CreateCollectionInstance(collectionItem);
complexs[item.Index] = collectionInstance;
content.Members.Add(collectionItem, new OutputContentCollection(collectionItem, collectionInstance));
}
}
content.Content = Metadata.CreateInstance(reader, ItemFields, complexs);
}
return(content);
}
/// <summary>
/// 添加指定键值及输出内容项。
/// </summary>
/// <param name="key">键值。</param>
/// <param name="value">关联输出内容项。</param>
public void Add(string key, OutputContentObject value)
{
KeyCollection.Add(key, value);
Output.Metadata.CollectionAdd(Content, value.Content);
}
/// <summary>
/// 使用指定的键值获取输出内容项。
/// </summary>
/// <param name="key">当前键值。</param>
/// <param name="value">获取的内容项。</param>
/// <returns>是否执行成功。</returns>
public bool TryGetValue(string key, out OutputContentObject value)
{
return(KeyCollection.TryGetValue(key, out value));
}