我一直在使用的一个应用程序在尝试序列化类型时失败了。
像这样的陈述
XmlSerializer lizer = new XmlSerializer(typeof(MyType));
生产:
System.IO.FileNotFoundException occurred
Message="Could not load file or assembly '[Containing Assembly of MyType].XmlSerializers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified."
Source="mscorlib"
FileName="[Containing Assembly of MyType].XmlSerializers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
FusionLog=""
StackTrace:
at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
我没有为我的类定义任何特殊的序列化器。
我该如何解决这个问题?
看到过很多使用ConcurrentDictionary的建议,但没有可靠的例子,所以我将全身心投入到这个解决方案竞赛中。我不是一个线程安全的开发人员,所以如果这段代码不可靠,请为那些跟随的人说出来。
public static class XmlSerializerHelper
{
private static readonly ConcurrentDictionary<Type, XmlSerializer> TypeSerializers = new ConcurrentDictionary<Type, XmlSerializer>();
public static XmlSerializer GetSerializer(Type type)
{
return TypeSerializers.GetOrAdd(type,
t =>
{
var importer = new XmlReflectionImporter();
var mapping = importer.ImportTypeMapping(t, null, null);
return new XmlSerializer(mapping);
});
}
}
我看过其他关于ConcurrentDictionary和Lazy加载值的文章。我不确定这是否与此相关,但这里是它的代码:
private static readonly ConcurrentDictionary<Type, Lazy<XmlSerializer>> TypeSerializers = new ConcurrentDictionary<Type, Lazy<XmlSerializer>>();
public static XmlSerializer GetSerializer(Type type)
{
return TypeSerializers.GetOrAdd(type,
t =>
{
var importer = new XmlReflectionImporter();
var mapping = importer.ImportTypeMapping(t, null, null);
var lazyResult = new Lazy<XmlSerializer>(() => new XmlSerializer(mapping), LazyThreadSafetyMode.ExecutionAndPublication);
return lazyResult;
}).Value;
}