C# IsolatedStorage读取时发生FormatException

我在应用程序设置中存储了一些项目。当我这么做的时候

这是._userSettings=IsolatedStorageSettings.ApplicationSettings

我得到一个System.FormatException。当我阅读时，我如何找出是什么导致了它？我假设某个东西在隔离存储中，不应该在那里

这是书堆

 at System.Double.Parse(String s, NumberStyles style, IFormatProvider provider)
   at System.Xml.XmlConvert.ToDouble(String s)
   at System.Xml.XmlReader.ReadContentAsDouble()
   at System.Xml.XmlDictionaryReader.XmlWrappedReader.ReadContentAsDouble()
   at System.Xml.XmlDictionaryReader.ReadElementContentAsDouble()
   at System.Runtime.Serialization.XmlReaderDelegator.ReadElementContentAsDouble()
   at System.Reflection.RuntimeMethodInfo.InternalInvoke(RuntimeMethodInfo rtmi, Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
   at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at System.Runtime.Serialization.XmlFormatReader.ReadValue(Type type, String name, String ns, XmlObjectSerializerReadContext context, XmlReaderDelegator xmlReader)
   at System.Runtime.Serialization.XmlFormatReader.ReadMemberAtMemberIndex(ClassDataContract classContract, Object& objectLocal, DeserializedObject desObj)
   at System.Runtime.Serialization.XmlFormatReader.ReadClass(DeserializedObject desObj, ClassDataContract classContract, Int32 membersRead)
   at System.Runtime.Serialization.XmlFormatReader.Deserialize(XmlObjectSerializerReadContext context)
   at System.Runtime.Serialization.XmlFormatReader.InitializeCallStack(DataContract clContract, XmlReaderDelegator xmlReaderDelegator, XmlObjectSerializerReadContext xmlObjContext, XmlDictionaryString[] memberNamesColl, XmlDictionaryString[] memberNamespacesColl)
   at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
   at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
   at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, DataContract& dataContract)
   at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, DataContract dataContract, String name, String ns)
   at System.Runtime.Serialization.DataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName)
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName)
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader)
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(Stream stream)
   at System.IO.IsolatedStorage.IsolatedStorageSettings.Reload()
   at System.IO.IsolatedStorage.IsolatedStorageSettings..ctor(Boolean useSiteSettings)
   at System.IO.IsolatedStorage.IsolatedStorageSettings.get_ApplicationSettings()
   at ShowSeek.Custom_Classes.StateManager.SetupState()
   at ShowSeek.App.Application_Activated(Object sender, ActivatedEventArgs e)
   at Microsoft.Phone.Shell.PhoneApplicationService.FireActivated(Boolean isExecutionContextPreserved)
   at Microsoft.Phone.Execution.NativeEmInterop.FireOnResume(Boolean isExecutionContextPreserved)

---

Windows Phone Silverlight中的函数double.Parse实现如下：

public static double Parse(string s, NumberStyles style, IFormatProvider provider)
{
    NumberFormatInfo.ValidateParseStyleFloatingPoint(style);
    NumberFormatInfo instance = NumberFormatInfo.GetInstance(provider);
    double result = 0.0;
    try
    {
        Number.ParseDouble(s, style, instance, true, ref result);
        return result;
    }
    catch (FormatException)
    {
        string str = s.Trim();
        if (str.Equals(instance.PositiveInfinitySymbol))
        {
            return PositiveInfinity;
        }
        if (str.Equals(instance.NegativeInfinitySymbol))
        {
            return NegativeInfinity;
        }
        if (!str.Equals(instance.NaNSymbol))
        {
            throw;
        }
        return NaN;
    }
}

---

基本上，它首先尝试将你的double读作一个数字。如果它失败了，它将尝试特殊情况下的无限，南。方法就是这样实现的，对此你无能为力。性能影响应该可以忽略不计，特别是因为在应用程序生命周期中，当您第一次尝试访问IsolatedStorageSettings.ApplicationSettings时，它只会发生一次。

您以前的设置可能已更改，例如，类定义已更改

使用：

---

清空以前存储的设置。不要忘记在使用代码后对其进行注释。

我遇到了与使用传递的InvarientCulture作为IFormatProvider时解决的相同错误

Convert.ToDouble(Text, CultureInfo.InvariantCulture);

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如果您发布完整的堆栈跟踪和消息，可能会有所帮助……还可能有助于定义_usersettings的类型该类型为IsolatedStorageSettings。看起来它无法反序列化您以前在IsolatedStorageSettings中放置的内容。我想知道这怎么可能。是否您在某个时候更改了手机的语言，然后重新启动了应用程序？如果是这种情况，我该如何处理？

Convert.ToDouble(Text, CultureInfo.InvariantCulture);