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CodeActivity.CacheMetadata Method (CodeActivityMetadata)

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

Namespace:  System.Activities
Assembly:  System.Activities (in System.Activities.dll)

protected virtual void CacheMetadata(
	CodeActivityMetadata metadata
)

Parameters

metadata
Type: System.Activities.CodeActivityMetadata

The activity’s metadata that encapsulates the activity’s arguments, variables, child activities, and activity delegates.

The workflow runtime uses the default implementation of CacheMetadata to ensure correct construction of a workflow as well as to manage runtime relationships and lifetime rules. The default implementation of CacheMetadata examines the public members of the activity type using the type’s TypeDescriptor. These public members are of type Argument, Variable, [T:System.Collections.Generic.IEnumerable<T:System.Activities.Variable>], Activity, [T:System.Collections.Generic.IEnumerable<T:System.Activities.Activity>], or ActivityDelegate. You can override this method to customize the building of the activity’s run-time description and to provide custom validation logic. Any exceptions that are thrown from CacheMetadata are not treated as validation errors. These exceptions will escape from the call to Validate and must be handled by the caller.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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