c# - 无法访问已关闭的流 ASP.net v2.0

Question

我们有一个非常奇怪的问题，下面的代码在所有开发人员机器/我们的 2 个测试服务器上运行良好，无论是代码还是构建版本，但是当它在具有 Windows 2003 服务器和 asp 的虚拟机上运行时。 net v2.0 它抛出一个错误

Cannot access a closed stream.

public String convertResultToXML(CResultObject[] state)
{
    MemoryStream stream = null;
    TextWriter writer = null;
    try
    {
        stream = new MemoryStream(); // read xml in memory
        writer = new StreamWriter(stream, Encoding.Unicode);
        // get serialise object
        XmlSerializer serializer = new XmlSerializer(typeof(CResultObject[]));
        serializer.Serialize(writer, state); // read object
        int count = (int)stream.Length; // saves object in memory stream
        byte[] arr = new byte[count];
        stream.Seek(0, SeekOrigin.Begin);
        // copy stream contents in byte array
        stream.Read(arr, 0, count);
        UnicodeEncoding utf = new UnicodeEncoding(); // convert byte array to string
        return utf.GetString(arr).Trim();
    }
    catch
    {
        return string.Empty;
    }
    finally
    {
        if (stream != null) stream.Close();
        if (writer != null) writer.Close();
    }
}

知道为什么要这样做吗？

Answer 1

对于您的Serialize，使用using 来防止流保持打开。

像这样:

using (StreamWriter streamWriter = new StreamWriter(fullFilePath))
{
     xmlSerializer.Serialize(streamWriter, toSerialize);
}