指定XmlRootAttribute当XmlSerializer的性能问题 [英] XmlSerializer Performance Issue when Specifying XmlRootAttribute

问题描述

目前，我有一个很奇怪的问题，我似乎无法弄清楚如何解决它。

I'm currently having a really weird issue and I can't seem to figure out how to resolve it.

我有一个的非常的复杂的类型，我尝试使用XmlSerializer类序列化。这其实是精功能和类型序列化正常，但似乎需要的非常的很长一段时间这样做;约5秒，这取决于该对象中的数据。

I've got a fairly complex type which I'm trying to serialize using the XmlSerializer class. This actually functions fine and the type serializes properly, but seems to take a very long time in doing so; around 5 seconds depending on the data in the object.

在进行位分析我已经缩小的问题下来 - 奇怪的是 - 到指定XmlRootAttribute调用XmlSerializer.Serialize时。我这样做是为了改变一个集合的名称被序列化从ArrayOf的东西多一点有意义的。有一次，我删除了参数的操作几乎瞬间！

After a bit of profiling I've narrowed the issue down - bizarrely - to specifying an XmlRootAttribute when calling XmlSerializer.Serialize. I do this to change the name of a collection being serialized from ArrayOf to something a bit more meaningful. Once I remove the parameter the operation is almost instant!

任何想法或建议将是极好的，我完全难倒这一个！

Any thoughts or suggestions would be excellent as I'm entirely stumped on this one!

推荐答案

只是为别人谁运行到这个问题;手持上面我设法使用下面的类来解决这个问题的答案，从MSDN的例子：

Just for anyone else who runs into this problem; armed with the answer above and the example from MSDN I managed to resolve this issue using the following class:

public static class XmlSerializerCache
{
    private static readonly Dictionary<string, XmlSerializer> cache =
                            new Dictionary<string, XmlSerializer>();

    public static XmlSerializer Create(Type type, XmlRootAttribute root)
    {
        var key = String.Format(
                  CultureInfo.InvariantCulture,
                  "{0}:{1}",
                  type,
                  root.ElementName);

        if (!cache.ContainsKey(key))
        {
            cache.Add(key, new XmlSerializer(type, root));
        }

        return cache[key];
    }
}

然后，而不是使用默认的XmlSerializer的构造函数需要一个XmlRootAttribute，我用下面的代替：

Then instead of using the default XmlSerializer constructor which takes an XmlRootAttribute, I use the following instead:

var xmlRootAttribute = new XmlRootAttribute("ExampleElement");
var serializer = XmlSerializerCache.Create(target.GetType(), xmlRootAttribute);

我的应用程序现在已经执行了！

My application is now performing again!

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