WebService中Hashtable用法

Posted 2020-09-20

知识转自这里

code slice 01

 1 　　   /// <summary>
 2         /// 反序列化数据
 3         /// </summary>
 4         /// <param name="sXml"></param>
 5         /// <param name="type"></param>
 6         /// <returns></returns>
 7         private T DeSerializer<T>(String sXml, Type type)
 8         {
 9             XmlReader reader = XmlReader.Create(new StringReader(sXml));//还有的解释用FileStream，应该无所谓，没查出serializer.Deserialize参数类型
10             System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(type);//告知需要解析的type
11             object obj = serializer.Deserialize(reader);//解析后的obj可以直接转换为type类型
12             return (T)obj;
13         }

code slice 02

 1 　   　/// <summary>
 2         /// HashTable序列化Xml内容
 3         /// </summary>
 4         /// <param name="_ContextXml"></param>
 5         /// <returns></returns>
 6         [WebMethod(Description = "WebService传递HashTable值")]
 7         public Boolean SetHashValue(String _ContextXml)
 8         {
 9             Hashtable _Hash = new Hashtable();
10             DictionaryEntry[] _DictArray = DeSerializer<DictionaryEntry[]>(_ContextXml, typeof(DictionaryEntry[]));
11             foreach (DictionaryEntry _Entity in _DictArray)
12             {
13                 _Hash.Add(_Entity.Key, _Entity.Value);
14             }
15             return true;
16         }

注：此函数的功能是避免以Hashtable为参，WebService不允许。

code slice 03

 1 　　   /// <summary>
 2         /// 序列化数据类型
 3         /// </summary>
 4         /// <typeparam name="T"></typeparam>
 5         /// <param name="objToXml"></param>
 6         /// <returns></returns>
 7         public String Serializer<T>(T objToXml)
 8         {
 9             System.IO.StringWriter writer = new System.IO.StringWriter();
10             System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(objToXml.GetType());
11             serializer.Serialize(writer, objToXml);//将ibjToXml序列化之后写进writer
12             return writer.GetStringBuilder().ToString();
13         }

注：System.Xml.Serialization.XmlSerializer序列化

code slice 04

 1 　　  private void ClientSetHashValue()
 2         {
 3    
 4             //DemoService.Service1 _Service = new DemoService.Service1();
 5             Hashtable _Hash = new Hashtable();
 6             _Hash.Add("User", "yifeng");
 7             _Hash.Add("Address", "this is yifeng‘s Address");
 8             _Hash.Add("Age", "20");
　　　　　　　　　//HashtableToDic
 9 　　　　　　　//DictionaryEntry必须先定义大小
10             DictionaryEntry[] _DictEntry = new DictionaryEntry[_Hash.Count];
11             _Hash.CopyTo(_DictEntry, 0);//大小和Hashtable不一致也可
12 　　　　　　  //DicToHashtable
13             String _Context = Serializer<DictionaryEntry[]>(_DictEntry);
14             Boolean _Status = _Service.SetHashValue(_Context);
15         }

Hashtable在WebService中无法使用copy函数拷贝内容至DictionaryEntry,解决方法见code slice 05(关于WebService通信，后续会记录)

code slice 05

1 proname.DictionaryEntry[] _DictEntry = new proname.DictionaryEntry[_Hash.Count]
2 int i = 0;
3 foreach(string keys in _Hash.Keys)
4 {
5     _DictEntry[i] = new proname.DictionaryEntry();//重点！
6     _DictEntry[i].Key = keys;
7     _DictEntry[i].Value = _Hash[keys];
8     i++;
9 }