How to add, remove and start workflow programmatically?

Removing Association

 

    1: SPSite site = new SPSite("https://localhost");

    2: SPWeb web = site.OpenWeb();

    3: SPList list = web.Lists["Shared Documents"];

    4: SPWorkflowAssociation _association = null;

    5: foreach (SPWorkflowAssociation association in list.WorkflowAssociations)

    6: {

    7: if (association.Name == "Approval")

    8: {

    9: _association = association;

   10: break; 

   11: }

   12: }

   13: if(_association !=null)

   14: list.RemoveWorkflowAssociation(_association);

 

Adding workflow to the library

    1: SPSite site = new SPSite("https://localhost");

    2: SPWeb web = site.OpenWeb();

    3: SPList list = web.Lists["Shared Documents"];

    4: SPList taskList = web.Lists["Tasks"];

    5: SPList historyList = web.Lists["Workflow History"]; 

    6: SPWorkflowTemplate _template = null;

    7: foreach (SPWorkflowTemplate template in web.WorkflowTemplates)

    8: {

    9: if (template.Name == "Approval")

   10: {

   11: _template = template;

   12: break; 

   13: } 

   14: }

   15: SPWorkflowAssociation asso = SPWorkflowAssociation.CreateListAssociation(_template, _template.Name, taskList, historyList); 

   16: list.AddWorkflowAssociation(asso);

Starting workflow

 

    1: SPSite site = new SPSite("https://localhost");

    2: SPWeb web = site.OpenWeb();

    3: SPList list = web.Lists["Shared Documents"];

    4: SPWorkflowAssociation association = AddWorkflow(); // Above function to get the SPWorlflowAssociation object

    5: SPWorkflowManager manager = site.WorkflowManager; 

    6: for (int idx = 0; idx < 10 ; idx++) // I'm assuming there would be atleast 10 items within the library

    7: {

    8: SPListItem item = list.Items[idx];

    9: manager.StartWorkflow(item,association, "you can pass any data here",true);

   10: }

Comments

• Anonymous
  August 27, 2008
  PingBack from http://hubsfunnywallpaper.cn/?p=2679

• Anonymous
  November 23, 2008
  Hi, Im trying to remove a specific workflow from all pages list in a sitecollection. but i get this error when i run though the site: Collection was modified; enumeration operation may not execute.   at Microsoft.SharePoint.SPBaseCollection.SPEnumerator.System.Collections.IEnumerator.MoveNext() in this line of code: "foreach (SPList currentList in currentWeb.Lists)" This is the code i use:            using (SPSite site = new SPSite(SPContextID))            {                foreach (SPWeb currentWeb in site.AllWebs)                {                    try                    {                        foreach (SPList currentList in currentWeb.Lists)                        {                            if (currentList.Title.ToLower().Equals("pages"))                            {                                currentList.EnableModeration = true;                                foreach (Microsoft.SharePoint.Workflow.SPWorkflowAssociation wfa in currentList.WorkflowAssociations)                                {                                    if (wfa.Name.Equals("Parallel Approval"))                                    {                                        currentList.RemoveWorkflowAssociation(wfa);                                        break; // Only this workflow has to be removed, bail out when done.                                    }                                }                            }                        }                    }                    finally                    {                        currentWeb.Dispose();                    }                }            } Do you have any idea's?

• Anonymous
  January 03, 2010
  @Peter: RemoveWorkflowAssociation called in a foreach will modify the iterator as it goes... use a for or while loop instead -- Michhes

• Anonymous
  March 15, 2012
  Is it possible to change the approvers dynamically.???

• Anonymous
  February 05, 2015
  How to remove workflow from SPlistItems??