带隔离存储设置的 FormatException

问题描述

我在将 Dictionary 序列化到 IndependentStorageSettings 时遇到问题.我正在执行以下操作:

I have a problem when serializing a Dictionary<string,Person> to IsolatedStorageSettings. I'm doing the following:

public Dictionary<string, Person> Names = new Dictionary<string, Person>();

if (!IsolatedStorageSettings.ApplicationSettings.Contains("Names"))
        {
            //Add to dictionary
            Names.Add("key", new Person(false,
                new System.Device.Location.GeoCoordinate(0, 0),
                new List<GeoCoordinate>()
                {
                    new GeoCoordinate(35.8974, 14.5099),
                    new GeoCoordinate(35.8974, 14.5099),
                    new GeoCoordinate(35.8973, 14.5100),
                    new GeoCoordinate(35.8973, 14.5099)
                }));
            //Serialize dictionary to IsolatedStorage
            IsolatedStorageSettings.ApplicationSettings.Add("Names", Names);
            IsolatedStorageSettings.ApplicationSettings.Save();
        }

这是我的 Person 类:

Here is my Person class:

[DataContract]
public class Person
{
    [DataMember]
    public bool Unlocked { get; set; }
    [DataMember]
    public GeoCoordinate Location { get; set; }
    [DataMember]
    public List<GeoCoordinate> Bounds { get; set; }

    public Person(bool unlocked, GeoCoordinate location, List<GeoCoordinate> bounds)
    {
        this.Unlocked = unlocked;
        this.Location = location;
        this.Bounds = bounds;
    }
}

代码第一次工作，但是在第二次运行时，我在 if 条件下得到一个 System.FormatException.任何帮助将不胜感激谢谢.

The code works the first time, however on the second run I get a System.FormatException at the if condition. Any help would be highly appreciated thanks.

P.S.:我尝试了一个IsolatedStorageSettings.ApplicationSettings.Clear() 但是对Clear 的调用也给出了一个FormatException.

P.S.: I tried an IsolatedStorageSettings.ApplicationSettings.Clear() but the call to Clear also gives a FormatException.

我发现了一些新东西……异常出现了 25 次，或者至少是它在输出"窗口中出现的次数.然而在那之后，数据被完美地反序列化.如果它们不停止程序的执行，我是否应该担心异常?

I have found something new...the exception occurs twenty-five times, or at least that's how many times it shows up in the Output window. However after that, the data is deserialized perfectly. Should I be worried about the exceptions if they do not stop the execution of the program?

这是发生异常时的调用堆栈:

Here's the call stack when the exception occurs:

mscorlib.dll!double.Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) + 0x17 bytes
System.Xml.dll!System.Xml.XmlConvert.ToDouble(string s) + 0x4b bytes
System.Xml.dll!System.Xml.XmlReader.ReadContentAsDouble() + 0x1f bytes
System.Runtime.Serialization.dll!System.Xml.XmlDictionaryReader.XmlWrappedReader.ReadContentAsDouble() + 0xb bytes
System.Runtime.Serialization.dll!System.Xml.XmlDictionaryReader.ReadElementContentAsDouble() + 0x35 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlReaderDelegator.ReadElementContentAsDouble() + 0x19 bytes
mscorlib.dll!System.Reflection.RuntimeMethodInfo.InternalInvoke(System.Reflection.RuntimeMethodInfo rtmi, object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object parameters, System.Globalization.CultureInfo culture, bool isBinderDefault, System.Reflection.Assembly caller, bool verifyAccess, ref System.Threading.StackCrawlMark stackMark)
mscorlib.dll!System.Reflection.RuntimeMethodInfo.InternalInvoke(object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object[] parameters, System.Globalization.CultureInfo culture, ref System.Threading.StackCrawlMark stackMark) + 0x168 bytes
mscorlib.dll!System.Reflection.MethodBase.Invoke(object obj, object[] parameters) + 0xa bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlFormatReader.ReadValue(System.Type type, string name, string ns, System.Runtime.Serialization.XmlObjectSerializerReadContext context, System.Runtime.Serialization.XmlReaderDelegator xmlReader) + 0x138 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlFormatReader.ReadMemberAtMemberIndex(System.Runtime.Serialization.ClassDataContract classContract, ref object objectLocal, System.Runtime.Serialization.DeserializedObject desObj) + 0xc4 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlFormatReader.ReadClass(System.Runtime.Serialization.DeserializedObject desObj, System.Runtime.Serialization.ClassDataContract classContract, int membersRead) + 0xf3 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlFormatReader.Deserialize(System.Runtime.Serialization.XmlObjectSerializerReadContext context) + 0x36 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlFormatReader.InitializeCallStack(System.Runtime.Serialization.DataContract clContract, System.Runtime.Serialization.XmlReaderDelegator xmlReaderDelegator, System.Runtime.Serialization.XmlObjectSerializerReadContext xmlObjContext, System.Xml.XmlDictionaryString[] memberNamesColl, System.Xml.XmlDictionaryString[] memberNamespacesColl) + 0x77 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(System.Runtime.Serialization.XmlReaderDelegator xmlReader, System.Runtime.Serialization.XmlObjectSerializerReadContext context) + 0x5d bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(System.Runtime.Serialization.DataContract dataContract, System.Runtime.Serialization.XmlReaderDelegator reader) + 0x3 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(System.Runtime.Serialization.XmlReaderDelegator reader, string name, string ns, ref System.Runtime.Serialization.DataContract dataContract) + 0x10e bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(System.Runtime.Serialization.XmlReaderDelegator xmlReader, System.Type declaredType, System.Runtime.Serialization.DataContract dataContract, string name, string ns) + 0xb bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.DataContractSerializer.InternalReadObject(System.Runtime.Serialization.XmlReaderDelegator xmlReader, bool verifyObjectName) + 0x124 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(System.Runtime.Serialization.XmlReaderDelegator reader, bool verifyObjectName) + 0xe bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlObjectSerializer.ReadObject(System.Xml.XmlDictionaryReader reader) + 0x7 bytes
System.Runtime.Serialization.dll!System.Runtime.Serialization.XmlObjectSerializer.ReadObject(System.IO.Stream stream) + 0x17 bytes
System.Windows.dll!System.IO.IsolatedStorage.IsolatedStorageSettings.Reload() + 0xa3 bytes
System.Windows.dll!System.IO.IsolatedStorage.IsolatedStorageSettings.IsolatedStorageSettings(bool useSiteSettings) + 0x20 bytes
System.Windows.dll!System.IO.IsolatedStorage.IsolatedStorageSettings.ApplicationSettings.get() + 0xd bytes

推荐答案

看起来 GeoCoordinate 可能无法序列化.您可以尝试创建自己的类，其中包含两个用于存储的双精度数，然后在检索时将它们转换回.

It looks like GeoCoordinate might not be serializable. You could try creating your own class with two doubles for the storage and then convert them back on retrieval.

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