VisualBasicValue<TResult> VisualBasicValue<TResult> VisualBasicValue<TResult> VisualBasicValue<TResult> Class


Contains an expression in Visual Basic syntax that evaluates to an r-value, which supports binding of In arguments.

generic <typename TResult>
public ref class VisualBasicValue sealed : System::Activities::CodeActivity<TResult>, System::Activities::Expressions::ITextExpression, System::Activities::XamlIntegration::IValueSerializableExpression
public sealed class VisualBasicValue<TResult> : System.Activities.CodeActivity<TResult>, System.Activities.Expressions.ITextExpression, System.Activities.XamlIntegration.IValueSerializableExpression
type VisualBasicValue<'Result> = class
    inherit CodeActivity<'Result>
    interface IValueSerializableExpression
    interface ITextExpression
Public NotInheritable Class VisualBasicValue(Of TResult)
Inherits CodeActivity(Of TResult)
Implements ITextExpression, IValueSerializableExpression

Type Parameters


The type of the expression.



This activity uses the LINQ to Entity provider to evaluate LINQ expressions. Any LINQ expressions used with this activity must be evaluatable by the ADO.Net Entity Data Model. For example, LINQ expressions cannot be used to reference activities, variables, or arguments of the workflow itself.


VisualBasicValue<TResult>() VisualBasicValue<TResult>() VisualBasicValue<TResult>() VisualBasicValue<TResult>()

Initializes a new instance of the VisualBasicValue<TResult> class.

VisualBasicValue<TResult>(String) VisualBasicValue<TResult>(String) VisualBasicValue<TResult>(String) VisualBasicValue<TResult>(String)

Initializes a new instance of the VisualBasicValue<TResult> class using the specified expression.


CacheId CacheId CacheId CacheId

Gets the identifier of the cache that is unique within the scope of the workflow definition.

(Inherited from Activity)
Constraints Constraints Constraints Constraints

Gets a collection of Constraint activities that can be configured to provide validation for the Activity.

(Inherited from Activity)
DisplayName DisplayName DisplayName DisplayName

Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking.

(Inherited from Activity)
ExpressionText ExpressionText ExpressionText ExpressionText

Gets or sets the Visual Basic expression represented by this VisualBasicValue<TResult>.

Id Id Id Id

Gets an identifier that is unique in the scope of the workflow definition.

(Inherited from Activity)
Implementation Implementation Implementation Implementation

Not supported.

(Inherited from CodeActivity<TResult>)
ImplementationVersion ImplementationVersion ImplementationVersion ImplementationVersion

Gets or sets the implementation version of the activity.

(Inherited from CodeActivity<TResult>)
Language Language Language Language

Gets the language used for the value.

RequiresCompilation RequiresCompilation RequiresCompilation RequiresCompilation

Gets whether the value requires compilation.

Result Result Result Result

Gets or sets the result argument for the Activity<TResult>.

(Inherited from Activity<TResult>)
ResultType ResultType ResultType ResultType

When implemented in a derived class, gets the type of an activity OutArgument.

(Inherited from ActivityWithResult)


CacheMetadata(ActivityMetadata) CacheMetadata(ActivityMetadata) CacheMetadata(ActivityMetadata) CacheMetadata(ActivityMetadata)

Not implemented. Use CacheMetadata(CodeActivityMetadata) instead.

(Inherited from CodeActivity<TResult>)
CacheMetadata(CodeActivityMetadata) CacheMetadata(CodeActivityMetadata) CacheMetadata(CodeActivityMetadata) CacheMetadata(CodeActivityMetadata)

Creates and validates a description of the activity's arguments, variables, child activities, and activity delegates.

(Inherited from CodeActivity<TResult>)
CanConvertToString(IValueSerializerContext) CanConvertToString(IValueSerializerContext) CanConvertToString(IValueSerializerContext) CanConvertToString(IValueSerializerContext)

Determines whether the VisualBasicValue<TResult> can be converted into a String.

ConvertToString(IValueSerializerContext) ConvertToString(IValueSerializerContext) ConvertToString(IValueSerializerContext) ConvertToString(IValueSerializerContext)

Converts the VisualBasicValue<TResult> to a String.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
Execute(CodeActivityContext) Execute(CodeActivityContext) Execute(CodeActivityContext) Execute(CodeActivityContext)

When implemented in a derived class, performs the execution of the activity.

(Inherited from CodeActivity<TResult>)
GetExpressionTree() GetExpressionTree() GetExpressionTree() GetExpressionTree()

Returns the expression tree for the value.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity) OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity) OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity) OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity)

Raises an event when creating a map for the dynamic update.

(Inherited from CodeActivity<TResult>)
ShouldSerializeDisplayName() ShouldSerializeDisplayName() ShouldSerializeDisplayName() ShouldSerializeDisplayName()

Indicates whether the DisplayName property should be serialized.

(Inherited from Activity)
ToString() ToString() ToString() ToString()

Returns a String that contains the Id and DisplayName of the Activity.

(Inherited from Activity)

Applies to