Aspose.Workflow will same the history data for a process instance also with tasks of the instance. Aspose.Workflow allows its users to Read these History Data at runtime using its simple API.

 

Reading Task History by intance id

 

An example is given below to demonstrate about accessing task history by instance id.

 

Example:

 

[C#]

 

//Instantiate an object of EngineManager

EngineManager manager = EngineManager.Instance;

 

//Configure the EngineManager object

manager.Configure();

 

//Create an object of IEngine interface

IEngine engine = manager.Engine;

 

//Login to the Aspose.Workflow engine

engine.Login("aspose","aspose");

 

//Create an instance of IHistoryAdmin interface

IHistoryAdmin historyAdmin = engine.Historydmin;

 

//Accessing a task history data using its instance Id

ITaskHistory[] histories =

        historyAdmin.GetInstanceTaskHistories("instanceId");

 

[VB.NET]

 

'Instantiate an object of EngineManager

Dim manager As EngineManager =  EngineManager.Instance

 

'Configure the EngineManager object

manager.Configure()

 

'Create an object of IEngine interface

Dim engine As IEngine =  manager.Engine

 

'Login to the Aspose.Workflow engine

engine.Login("aspose","aspose")

 

'Create an instance of IHistoryAdmin interface

Dim historyAdmin As IHistoryAdmin =  engine.HistoryAdmin

 

'Accessing a task history data using its instance Id

Dim histories As ITaskHistory[] = historyAdmin.GetInstanceTaskHistories("instanceId")