.net – 为什么XmlSerializer没有序列化我的数组？

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;
}

很简单吧？序列化这些列表应该是小菜一碟.

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,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>

看来我一定是犯了一个简单的错误.我怎样才能解决这个问题？

解决方法

您正在序列化一个Entry数组,将XmlSerializer的初始化更改为：

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