webservice中如何操作hashtable

在工作中，通常需要调用WebService,这样的话在参数传递方面，就诸多不便！比如自定义实体类、HashTable就不能直接传递，所以我们在客户端要把此类型数据经过序列化成XML后方可传递。今天，就简单给大家介绍一下，在Asp.net中如何简单、快速传递HashTable。

　　首先，在WebService中定义调用方法及反序列化Xml类型，代码如下：

　　 ? /// <summary>
??????? /// 反序列化数据
??????? /// </summary>
??????? /// <param name="sXml"></param>
??????? /// <param name="type"></param>
??????? /// <returns></returns>
??????? private T DeSerializer<T>(String sXml,Type type)
??????? {
??????????? XmlReader reader = XmlReader.Create(new StringReader(sXml));
??????????? System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(type);
??????????? object obj = serializer.Deserialize(reader);
??????????? return (T)obj;
??????? }

　?? 　/// <summary>
??????? /// HashTable序列化Xml内容
??????? /// </summary>
??????? /// <param name="_ContextXml"></param>
??????? /// <returns></returns>
??????? [WebMethod(Description = "WebService传递HashTable值")]
??????? public Boolean SetHashValue(String _ContextXml)
??????? {
??????????? Hashtable _Hash = new Hashtable();
??????????? DictionaryEntry[] _DictArray = DeSerializer<DictionaryEntry[]>(_ContextXml,typeof(DictionaryEntry[]));
??????????? foreach (DictionaryEntry _Entity in _DictArray)
??????????? {
??????????????? _Hash.Add(_Entity.Key,_Entity.Value);
??????????? }
??????????? return true;
??????? }

在客户端，序列化HashTable且定义序列化方法，代码如下:

　　 ? /// <summary>
??????? /// 序列化数据类型
??????? /// </summary>
??????? /// <typeparam name="T"></typeparam>
??????? /// <param name="objToXml"></param>
??????? /// <returns></returns>
??????? public String Serializer<T>(T objToXml)
??????? {
??????????? System.IO.StringWriter writer = new System.IO.StringWriter();
??????????? System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(objToXml.GetType());
??????????? serializer.Serialize(writer,objToXml);
??????????? return writer.GetStringBuilder().ToString();
??????? }

　　? private void ClientSetHashValue()
??????? {
??
??????????? DemoService.Service1 _Service = new DemoService.Service1();
??????????? Hashtable _Hash = new Hashtable();
??????????? _Hash.Add("User","yifeng");
??????????? _Hash.Add("Address","this is yifeng's Address");
??????????? _Hash.Add("Age","20");

??????????? DictionaryEntry[] _DictEntry = new DictionaryEntry[_Hash.Count];
??????????? _Hash.CopyTo(_DictEntry,0);

??????????? String _Context = Serializer<DictionaryEntry[]>(_DictEntry);
??????????? Boolean _Status = _Service.SetHashValue(_Context);
??????? }

　　到此，调用的服务器、客户端已完成，此外，我们还可以自定义实体类来传递，原理跟传递HashTable差不多，有兴趣的朋友，可以试下！