Cast<TOperand,TResult> 类

定义

尝试将操作数转换为给定类型。Attempts to convert an operand to a given type. 如果无法进行转换,则生成运行时错误。If the conversion is not possible a run-time error is generated.

generic <typename TOperand, typename TResult>
public ref class Cast sealed : System::Activities::CodeActivity<TResult>
public sealed class Cast<TOperand,TResult> : System.Activities.CodeActivity<TResult>
type Cast<'Operand, 'Result> = class
    inherit CodeActivity<'Result>
Public NotInheritable Class Cast(Of TOperand, TResult)
Inherits CodeActivity(Of TResult)

类型参数

TOperand

操作数的类型。The type of the operand.

TResult

结果的类型。The type of the result.

继承

构造函数

Cast<TOperand,TResult>()

初始化 Cast<TOperand,TResult> 类的新实例。Initializes a new instance of the Cast<TOperand,TResult> class.

属性

CacheId

获取缓存的标识符,该标识符在工作流定义的作用域内是唯一的。Gets the identifier of the cache that is unique within the scope of the workflow definition.

(继承自 Activity)
Checked

获取或设置一个值,该值指示强制转换运算是否在 checked 上下文中执行。Gets or sets a value that indicates whether the cast operation executes in a checked context.

Constraints

获取可配置的 Constraint 活动的集合,用于为 Activity 提供验证。Gets a collection of Constraint activities that can be configured to provide validation for the Activity.

(继承自 Activity)
DisplayName

获取或设置用于调试、验证、异常处理和跟踪的可选友好名称。Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking.

(继承自 Activity)
Id

获取一个标识符,该标识符在工作流定义的作用域内是唯一的。Gets an identifier that is unique in the scope of the workflow definition.

(继承自 Activity)
Implementation

不支持。Not supported.

(继承自 CodeActivity<TResult>)
ImplementationVersion

获取或设置活动的实现版本。Gets or sets the implementation version of the activity.

(继承自 CodeActivity<TResult>)
Operand

获取或设置操作数。Gets or sets the operand.

Result

获取或设置 Activity<TResult> 的结果参数。Gets or sets the result argument for the Activity<TResult>.

(继承自 Activity<TResult>)
ResultType

在派生类中实现时,获取 OutArgument 活动的类型。When implemented in a derived class, gets the type of an activity OutArgument.

(继承自 ActivityWithResult)

方法

CacheMetadata(ActivityMetadata)

未实现。Not implemented. 请改用 CacheMetadata(CodeActivityMetadata)Use CacheMetadata(CodeActivityMetadata) instead.

(继承自 CodeActivity<TResult>)
CacheMetadata(CodeActivityMetadata)

创建并验证活动的自变量、变量、子活动和活动委托的说明。Creates and validates a description of the activity's arguments, variables, child activities, and activity delegates.

(继承自 CodeActivity<TResult>)
Equals(Object)

确定指定对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(继承自 Object)
Execute(CodeActivityContext)

在派生类中实现时,执行该活动。When implemented in a derived class, performs the execution of the activity.

(继承自 CodeActivity<TResult>)
GetHashCode()

用作默认哈希函数。Serves as the default hash function.

(继承自 Object)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity)

为动态更新创建映射时,将引发事件。Raises an event when creating a map for the dynamic update.

(继承自 CodeActivity<TResult>)
ShouldSerializeDisplayName()

指示是否应序列化 DisplayName 属性。Indicates whether the DisplayName property should be serialized.

(继承自 Activity)
ToString()

返回包含 StringIdDisplayNameActivityReturns a String that contains the Id and DisplayName of the Activity.

(继承自 Activity)

适用于