EnumDataTypeAttribute.cs 检查数据字段的值是否有效。 C# publicoverrideboolIsValid(object?value); 参数 value Object 要验证的数据字段值。 返回 Boolean 如果数据字段值有效,则为true;否则为false。 适用于 产品版本 .NETCore 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3...
在下面的示例中,As子句用于指定枚举的datatype。 VB PublicEnumMyEnumAsByteZero One TwoEndEnum 示例6 下面的示例演示如何使用按位枚举。 可以将多个值分配给按位枚举的实例。Enum声明包含FlagsAttribute属性,该属性指示可以将枚举视为一组标志。 VB ' Apply the Flags attribute, which allows an instance' of th...
In C programming, an enum (enumeration) is a user-defined data type that is used to define a set of named integral constants; these constants are also known as enumerators. Enums allow you to create symbolic names (identifiers) that represent a set of values of different types, for example...
This property is inherited from Msft_WmiProvider_OperationEvent SECURITY_DESCRIPTOR Data type: uint8 array Access type: Read-only Descriptor that the event provider uses to determine which users can receive the event. For more information, see WMI Security Constants. This proper...
In the Win32 application programming interface (API) a key value has two halves, with the high-order bits containing the key code (which is the same as a Windows virtual key code), and the low-order bits representing key modifiers such as the SHIFT, CONTROL, and ALT keys. Warning Do ...
Enum Usually a enum type which simulates a bit set. Default_value A default Enum value for "unset" variables. Member Function Documentation ◆ get() template<typename Enum , Enum Default_value> Enum Enum_parser< Enum, Default_value >::get ( ) const inline Return the wrapped Enum va...
When updating an enum metadata field, one of the possible operations is the editField operation, which can be used to change the field's key, displayName, description, and hidden values. CopyExpand [ { "op": "editField", "fieldKey": "customer_state", "data": { "displayName": "Custo...
The BASE TYPE addition can be used to explicitly define the base type; all flat elementary data types no longer than 16 bytes can be specified for dtype.Enumerated constants Each enumerated value val1, val2, and so on is declared by a separate TYPES statement. These, however, do not ...
TheSortDirectionenumeration is used to represent the direction in which items are sorted. It is commonly used by properties (such as theSortDirectionproperty of theGridViewclass) to indicate the order in which items are displayed in a control. ...
The enum label 'red' has the value 'h00000013 which is outside the range of the base type of the declared enum, which is 4 bit unsigned. 上面这个示例也会导致编译错误,因为red=‘h13超出了 bit[3:0]所能够表示的最大值('hF) 。修改成下面的写法就没有问题了。