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php爱好者> php文档>.net2.0中WebService在序列化xml数据Generic字典类型的问题

.net2.0中WebService在序列化xml数据Generic字典类型的问题

时间：2011-01-13 来源：PetterLiu

[WebMethod]
 public IDictionary<string, string> UpdateThreadById(RequestThread reqThread)....

DEBUG，出现下面的Exception:

Cannot serialize interface System.Collections.Generic.IDictionary`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].

解决方法如下, 增一个类型:

    [XmlRoot("dictionary")]

    public class SerializableDictionary<TKey, TValue>: Dictionary<TKey, TValue>, IXmlSerializable

        #region IXmlSerializable Members

        public System.Xml.Schema.XmlSchema GetSchema()

            return null;

        public void ReadXml(System.Xml.XmlReader reader)

            var keySerializer = new XmlSerializer(typeof(TKey));

            var valueSerializer = new XmlSerializer(typeof(TValue));

            bool wasEmpty = reader.IsEmptyElement;

            reader.Read();

            if (wasEmpty)

                return;

            while (reader.NodeType != System.Xml.XmlNodeType.EndElement)

               reader.ReadStartElement("item");

                reader.ReadStartElement("key");

                TKey key = (TKey)keySerializer.Deserialize(reader);

                reader.ReadEndElement();

                reader.ReadStartElement("value");

                TValue value = (TValue)valueSerializer.Deserialize(reader);

                reader.ReadEndElement();

                Add(key, value);

                reader.ReadEndElement();

                reader.MoveToContent();

            reader.ReadEndElement();

        public void WriteXml(System.Xml.XmlWriter writer)

            var keySerializer = new XmlSerializer(typeof(TKey));

            var valueSerializer = new XmlSerializer(typeof(TValue));

            foreach (var key in this.Keys)

                writer.WriteStartElement("item");

                writer.WriteStartElement("key");

                keySerializer.Serialize(writer, key);

                writer.WriteEndElement();

                writer.WriteStartElement("value");

                TValue value = this[key];

                valueSerializer.Serialize(writer, value);

                writer.WriteEndElement();

                writer.WriteEndElement();

        #endregion

好了，用个新的类型替换原来的，就可以了。

希望对您开发有帮助。

作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。