java.lang.NoSuchFieldError: read_unknown_enum_values_using_default_value 这个错误通常表明 JVM 在运行时尝试访问或修改一个不存在于指定类或其超类中的字段。在这个具体的例子中,read_unknown_enum_values_using_default_value 字段看起来像是与序列化或反序列化枚举(Enum)时处理未知枚举值的方式相关,但这并不是...
{ public static final ObjectMapper OBJECT_MAPPER = JsonMapper.builder() .configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true) .build(); @Override public String handleRequest(Object input, Context context) { System.out.println(Feature.READ_UNKNOWN_ENUM_VALUES_USING_DEFAULT_VALUE); return...
When querying an entity with an enum field that has been mapped with .HasConversion<string>() (or manually with an EnumToStringConverter<>), Entity Framework reads unknown values in the database as the default value of the enum. This fal...
Cast to Enum issue when value is null Casting an Int16 varible to Int in C# produces a runtime "Specified cast is not valid" exception casting from object to System.Reflection.PropertyInfo Casting to nullable generics Casting using (decimal) or Convert.ToDecimal ? What to use? Catch an e...
public enum ConsistentReadControl extends Enum<ConsistentReadControl> Defines values to indicate what strategy the SDK should use when reading from a blob to ensure the view of the data is consistent and not changed during the read. NONE ETAG VERSION_ID Fields 展開資料表 ETAG Default value. NO...
object value) public static Task SaveAsByTemplateAsync(string path, byte[] templateBytes, object value) public static Task<DataTable> QueryAsDataTableAsync(string path, bool useHeaderRow = true, string sheetName = null, ExcelType excelType = ExcelType.UNKNOWN, string startCell = "A1", IConf...
Check if value is alphanumeric check isnull for UniqueIdentifier check table exists Check valid decimal and integer values using TSQL Checking for the existence of a SQL Agent Job Checking how long a Stored procedure has been run? Checking if xp_cmdshell is enabled or not Chinese characters issu...
public static Task SaveAsAsync(string path, object value, bool printHeader = true, string sheetName = "Sheet1", ExcelType excelType = ExcelType.UNKNOWN, IConfiguration configuration = null) public static Task SaveAsAsync(this Stream stream, object value, bool printHeader = true, string sheet...
Again, import thepatientsdatabase table using thesqlreadfunction, and display a summary of the imported data. data = sqlread(conn,tablename,opts); summary(data) Variables: LastName: 48×1 string Gender: 48×1 categorical Values: Female 34 Male 14 Age: 48×1 double Values: Min 41 Median ...
While the required keyword can't be used since it's from C# 11, using init alone is sufficient to guarantee immutability.public enum Gender { Male, Female, Unknown } // table definition marked by MemoryTableAttribute. // database-table must be serializable by MessagePack-CSsharp [MemoryTable...