Beispiel #1
0
 /// <summary>
 /// 创建数据项。
 /// </summary>
 /// <param name="reader">数据读取器。</param>
 /// <param name="parent">如果是导航属性则为父级对象</param>
 /// <returns>创建结果。</returns>
 protected object CreateItem(DbDataReader reader, OutputContentItem parent = null)
 {
     if (_Children.Count == 0 && !HasCollectionProperty)
     {
         return(Metadata.CreateInstance(reader, ItemFields, EmptyComplexObjects));
     }
     else
     {
         var complexs = new object[Metadata.ComplexMembers.Count];
         foreach (var item in Children.OfType <ComplexOutputInfo>())
         {
             if (item.Type == EOutputType.Object)
             {
                 complexs[item.Index] = item.CreateItem(reader, parent);
             }
             else
             {
                 var propertyMember = item.Parent.Metadata.ComplexMembers[item.Index];
                 var propertyType   = ((PropertyInfo)propertyMember.Member).PropertyType;
                 if (propertyType.IsInterface)
                 {
                     if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(IGrouping <,>))
                     {
                         var collectionType = typeof(GroupCollectionImpl <,>).MakeGenericType(propertyType.GetGenericArguments());
                         complexs[item.Index] = Activator.CreateInstance(collectionType);
                     }
                     else
                     {
                         var collectionType = typeof(HashSet <>).MakeGenericType(item.Metadata.ClrType);
                         complexs[item.Index] = Activator.CreateInstance(collectionType);
                     }
                 }
                 else if (propertyType.IsClass)
                 {
                     complexs[item.Index] = Activator.CreateInstance(propertyType);
                 }
                 else
                 {
                     throw new OutputException(this, string.Format(Res.NotSupportedInstanceType, propertyType));
                 }
                 parent.Collections.Add((CollectionOutputInfo)item, new OutputContentCollection((CollectionOutputInfo)item, complexs[item.Index]));
             }
         }
         return(Metadata.CreateInstance(reader, ItemFields, complexs));
     }
 }
        //注册使用内容项,用于生成集合属性用。
        private void RegisterItem(DbDataReader reader, OutputContentCollection collection)
        {
            string key = string.Join("_", ItemKeyFields.Select(a => reader.GetValue(a).ToString()).ToArray());

            if (!collection.TryGetValue(key, out OutputContentItem item))
            {
                item = new OutputContentItem();
                var content = CreateItem(reader, item);
                if (content != null)
                {
                    item.Content = content;
                    collection.Add(key, item);
                }
            }
            foreach (var kv in item.Collections)
            {
                kv.Key.RegisterItem(reader, kv.Value);
            }
        }
 /// <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, OutputContentItem value)
 {
     KeyCollection.Add(key, value);
     Output.Metadata.CollectionAdd(Target, 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 OutputContentItem value)
 {
     return(KeyCollection.TryGetValue(key, out value));
 }