为什么XmlSerializer没有序列化我的数组?

时间:2011-03-30 15:53:56

标签: .net xml xmlserializer

我是XmlSerializer的新手。我写了一个小类来保存数据库中的条目:

[Serializable]
public struct Entry
{
    public string artkey, lid, request, status, requestdate;
}

够简单吧?序列化这些列表应该是一块蛋糕。

我有一个编译这些列表的函数。要序列化我的列表,我尝试以下代码:

XmlSerializer serializer = new XmlSerializer(typeof(Entry));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
serializer.Serialize(ms, entries.ToArray());
ms.WriteTo(Response.OutputStream);

此代码打印以下异常:

<error>System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidCastException: Specified cast is not valid.
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterEntry.Write3_Entry(Object o)
   --- End of inner exception stack trace ---
   at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
   at System.Xml.Serialization.XmlSerializer.Serialize(Stream stream, Object o, XmlSerializerNamespaces namespaces)
   at System.Xml.Serialization.XmlSerializer.Serialize(Stream stream, Object o)
   at CCB_Requests.xmlResponse_selectFromCcb_Requests(HttpResponse response)
   at CCB_Requests.ProcessRequest(HttpContext context)</error>

似乎我必须犯一个简单的错误。我该如何解决这个问题?

3 个答案:

答案 0 :(得分:5)

您正在序列化Entry数组,将XmlSerializer的初始化更改为:

// typeof(Entry) ==> typeof(Entry[])
XmlSerializer serializer = new XmlSerializer(typeof(Entry[]));

答案 1 :(得分:1)

将其写为维基,因为它没有回答这个问题,但是要说明应该如何写这个类型:

public class Entry
{
    [XmlElement("artKey")]
    public string ArtKey {get;set;}

    // etc
}

由于原因,请参阅我添加到qestion的评论

答案 2 :(得分:0)

不要使用typeof()有时候你的Entry是Null或者是Faulted State然后它显示InvalidCastException,所以除了使用GetType()方法之外,它将提供与typeof()相同的输出。

   Entry e = new Entry();
            e.artkey = "as";
            e.lid = "lid";
            e.request = "request";
            e.requestdate = "req  uesteddate";
            e.GetType();
    try(e!=null)
    {
         XmlSerializer serializer = new XmlSerializer(e.GetType());
    }