LambdaReference<T> Class
Represents a lambda expression used as an l-value, which supports binding of Out arguments.
System.Activities::Activity
System.Activities::ActivityWithResult
System.Activities::Activity<Location<T>>
System.Activities::CodeActivity<Location<T>>
System.Activities.Expressions::LambdaReference<T>
Assembly: System.Activities (in System.Activities.dll)
The LambdaReference<T> type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | CacheId | Gets the identifier of the cache that is unique within the scope of the workflow definition. (Inherited from Activity.) |
![]() | Constraints | Gets a collection of Constraint activities that can be configured to provide validation for the Activity. (Inherited from Activity.) |
![]() | DisplayName | Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking. (Inherited from Activity.) |
![]() | Id | Gets an identifier that is unique in the scope of the workflow definition. (Inherited from Activity.) |
![]() | Implementation | Not supported. (Inherited from CodeActivity<TResult>.) |
![]() | Result | Gets or sets the result argument for the Activity<TResult>. (Inherited from Activity<TResult>.) |
![]() | ResultType | When implemented in a derived class, gets the type of an activity OutArgument. (Inherited from ActivityWithResult.) |
| Name | Description | |
|---|---|---|
![]() | CacheMetadata(ActivityMetadata) | Not implemented. Use CacheMetadata(CodeActivityMetadata) instead. (Inherited from CodeActivity<TResult>.) |
![]() | CacheMetadata(CodeActivityMetadata) | Creates and validates a description of the activity’s arguments, variables, child activities, and activity delegates. (Inherited from CodeActivity<TResult>.) |
![]() | CanConvertToString | This method always returns true and is used in conjunction with ConvertToString(IValueSerializerContext) to provide descriptive error messages when an attempt is made to serialize this activity to XAML. |
![]() | ConvertToString | Throws a LambdaSerializationException and is used in conjunction with CanConvertToString(IValueSerializerContext) to provide descriptive error messages when an attempt is made to serialize this activity to XAML. |
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Execute | When implemented in a derived class, performs the execution of the activity. (Inherited from CodeActivity<TResult>.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ShouldSerializeDisplayName | Indicates whether the DisplayName property should be serialized. (Inherited from Activity.) |
![]() | ToString | Returns a String that contains the Id and DisplayName of the Activity. (Inherited from Activity.) |
LambdaReference<T> is used for lambda expressions specified in code and cannot be serialized to XAML. If an attempt to serialize a workflow that contains a LambdaReference<T> is made, a LambdaSerializationException is thrown. If the containing workflow requires XAML serialization, use VisualBasicReference<TResult> or use ExpressionServices to convert the LambdaReference<T> to a format that can be serialized.
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.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
