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當我嘗試從表存儲讀取時，出現以下異常。我在添加DateTime?屬性後得到它。Azure Table Storage：字符串''不是有效的AllXsd值
例外：
The current value 'String.Empty' type is not compatible with the expected 'System.DateTime' type.
內部異常：
The string '' is not a valid AllXsd value.
我想通過以下方法解決：
- 我得到的供應商來映射不存在值爲空
- 更新帶有日期的對象（但我不能把它拿來？）
有沒有人對如何解決這一問題更好的主意嗎？
堆棧跟蹤：
System.InvalidOperationException: The current value 'String.Empty' type is not compatible with the expected 'System.DateTime' type. ---> System.FormatException: The string '' is not a valid AllXsd value.
at System.Xml.Schema.XsdDateTime..ctor(String text, XsdDateTimeFlags kinds)
at System.Xml.XmlConvert.ToDateTime(String s, XmlDateTimeSerializationMode dateTimeOption)
at System.Data.Services.Client.ClientConvert.ChangeType(String propertyValue, Type propertyType)
--- End of inner exception stack trace ---
at System.Data.Services.Client.ClientConvert.ChangeType(String propertyValue, Type propertyType)
at System.Data.Services.Client.AtomMaterializer.MaterializeDataValue(Type type, AtomContentProperty atomProperty, DataServiceContext context)
at System.Data.Services.Client.AtomMaterializer.MaterializeDataValues(ClientType actualType, List`1 values, Boolean ignoreMissingProperties, DataServiceContext context)
at System.Data.Services.Client.AtomMaterializer.MaterializeResolvedEntry(AtomEntry entry, Boolean includeLinks)
at System.Data.Services.Client.AtomMaterializer.Materialize(AtomEntry entry, Type expectedEntryType, Boolean includeLinks)
at System.Data.Services.Client.AtomMaterializer.DirectMaterializePlan(AtomMaterializer materializer, AtomEntry entry, Type expectedEntryType)
at System.Data.Services.Client.AtomMaterializerInvoker.DirectMaterializePlan(Object materializer, Object entry, Type expectedEntryType)
at System.Data.Services.Client.ProjectionPlan.Run(AtomMaterializer materializer, AtomEntry entry, Type expectedType)
at System.Data.Services.Client.AtomMaterializer.Read()
at System.Data.Services.Client.MaterializeAtom.MoveNextInternal()
at System.Data.Services.Client.MaterializeAtom.MoveNext()
at System.Linq.Enumerable.<CastIterator>d__b1`1.MoveNext()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
型號
class Car : TableServiceEntity {
public DateTime? LastUpdated { get; set; }
public DateTime? LastUsed { get; set; }
// more properties
}
查詢
var sx = this.GetServiceContext();
return (from x in sx.CreateQuery<Car>("Table") select x).ToList();