Programmatically change Workflow Auto Clean up days

Well, if you associate a workflow to any sharepoint list/ library & if the workflow instance is completed, then its association with its tasks and history list details will lasts for only 60 days. This is because we have a sharepoint out of the box "Workflow Auto clean up" timer job running daily for every webapplication.

If you want to change the default 60 days of clean up, then you are the right stop. The below sample will help you out to achieve the behaviour.

static void Main()

        {

            using (SPSite site = new SPSite("http://site_URL"))

            {

              using(  SPWeb web = site.OpenWeb())

              {

                SPWorkflowTemplateCollection collection = web.WorkflowTemplates;

                SPList list = web.Lists["LIST_NAME"];//List name

                SPWorkflowAssociation _asso = null;

                foreach (SPWorkflowAssociation asso in list.WorkflowAssociations)

                {

                    if (asso.Name == "WORKFLOW_NAME")//Workflow name

                    {

                        asso.AutoCleanupDays = 7;//clean up days

                        _asso = asso;

                    }

                }

               list.UpdateWorkflowAssociation(_asso);

            }}

        }

Happy Coding !!!!!