How to call multiple times “onworkflowItemChanged” event in state machine workflow?

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One of my customer would like to call “onWorkflowItemChanged” multiple times until the he got a specific value in a list item column. I have prepared the following solution to resolve the problem :-

 clip_image001

  • Created a State Machine workflow

  • Added two new states named “DocumentProcessed” and “StopWorkflow”.

  • Set the “StopWorkflow” activity’s state as “Completed State”.

  • Add an eventDrivenActivity in the “DocumentProcessed” state. Inside the eventDrivenActivity add the following activities :-

    clip_image002

  • In the IfElseBranchActivity1, set the condition property to code condition and call the check status method (which reads the column from list item and set the result.)

Code Sample

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    1: private void checkStatus(object sender, ConditionalEventArgs e)
    2: {
    3:             SPListItem item = workflowProperties.Item;
    4:             if (item["Status"].ToString().ToUpper() == "PENDING APPROVAL")
    5:             {
    6:                 e.Result = true;
    7:             }
    8:             else
    9:             {
   10:                 e.Result = false;
   11:             }
   12: }

  • Set the setstateActivity2 ”DocumentProcessed” and setstateActivity4 ”StopWorkflow”.

  • Compile the code and deploy the solution. Add a column name “Status” in Custom List.

  • To test the solution, add the item and set the status column value “Start”. Workflow will start with “InProgress” state.

  • Edit the item and change the status to “Pending approval”. Till then the status is pending approval you can modify the List Item and it will fire the “OnWorkflowItemChanged”.

  • Once you changed the status column value to ‘Complete”, it will complete the workflow and set the workflow status to “Completed”.