HashTable写入Xml的问题

[ouyang4683]

　//Station是个类
　//StationS是HashTable，存的Station
　　　　　　　　XmlSerializer serializer = null;
FileStream stream = null;
try
{
serializer = new XmlSerializer(typeof(Station[]));
stream = new FileStream(Application.StartupPath + "\\le.xml", FileMode.Open, FileAccess.Write);
serializer.Serialize(stream, (Station[])StationS.Values);
}

错误提示：无法将类型为“ValueCollection”的对象强制转换为类型“Station[]”。

要怎么改呢

[INTTNY]

try
{
serializer = new XmlSerializer(typeof(Station[]));
stream = new FileStream(Application.StartupPath + "\\le.xml", FileMode.Open, FileAccess.Write);
//这里改改吧
List<Station> stationList = new List<Station>(StattionS.Values.Count);
stationList.AddRange(StationS.Values);
Station[] stationValues = stationList.ToArray();
serializer.Serialize(stream, stationValues);
}

[ouyang4683]

一样的， stationList.AddRange(StationS.Values); 　这写不进来

[INTTNY]

报的什么错误？

[真相重于对错]

Hashtable 和数组 是不一样的类型

[INTTNY]

把那句话改下吧

stationList.AddRange(StationS.Values.OfType<string>());

[INTTNY]

错了，是这样改

stationList.AddRange(StationS.Values.OfType <Station>());

[ouyang4683]

OfType ？有这个东西么

[INTTNY]

嗯……

using System.Collections.Generic;

[LutzMark]

Hashtable没实现 IDictionary，不能被序列化为xml

[ouyang4683]

啊，呵呵　不是的，是我没说清

StationS是HashTable　

所以StationS.Values. 后面　没有OfType


试过
stationList.AddRange((Station[])StationS.Values);
也不好用

[LutzMark]

   using (FileStream fs = new FileStream(savekeyfile, FileMode.Create))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(List<string>));
                List<string> li = new List<string>();
                //这里假设哈希表里存的值都是字符串
                foreach (string s in ht.Values)
                {
                    li.Add(s);
                }
                serializer.Serialize(fs, li);  
                fs.Close();
            }

[INTTNY]

你用的是.NET2.0框架吧，用的VS2005？

那样的话你就只能够用foreach来逐个添加了

foreach (Station s in StationS.Values.GetEnumerator())
{
stationList.Add(s);
}

[ouyang4683]

问题又来了。。。
serializer.Serialize(stream, stationValues);

无法将类型为“System.Collections.Generic.List`1[StationS]”的对象强制转换为类型“Station

[真相重于对错]

Hashtable.values 只是一个 ICollection 接口,不是数组

[ouyang4683]

那我想把Hashtable　写入ＸＭＬ要怎么写呢。。。

[INTTNY]

你这个不对啊，你的stationList里边的是个什么东西？把你改动后的代码贴上来看下

[ouyang4683]

serializer = new XmlSerializer(typeof(Station[]));
stream = new FileStream(Application.StartupPath + "\\Visible.xml", FileMode.Open, FileAccess.Write);

List<Station> stationList = new List<Station>(StationS.Values.Count);

foreach (Station s in StationS.Values)
{
stationList.Add(s);
}

serializer.Serialize(stream, stationList);

[INTTNY]

缺少了点东西呢

serializer = new XmlSerializer(typeof(Station[]));
stream = new FileStream(Application.StartupPath + "\\Visible.xml", FileMode.Open, FileAccess.Write);

List <Station> stationList = new List <Station>(StationS.Values.Count);

foreach (Station s in StationS.Values)
{
stationList.Add(s);
}

//加这个
Station[] stationArray = stationList.ToArray();

serializer.Serialize(stream, stationArray); //这里也改下