csomCreateListWFAssociation.cs

using Microsoft.SharePoint.Client;
using Microsoft.SharePoint.Client.WorkflowServices;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security;

namespace CSOMWorkflow
{
    class Program
    {
        static void Main(string[] args)
        {
            //Replace the following values according to your configuration.
 
            //Site details
            string siteUrl = "https://mytenant.sharepoint.com/sites/test";
            string userName = "user@mytenant.onmicrosoft.com";
            string password = "password";

            //Name of the SharePoint2013 List Workflow
            string workflowName = "SP2013ListWF";
            
            //GUID of list on which to create the subscription (association);
            Guid targetListGuid = new Guid("fc50af29-8ae5-4303-bad1-213151818215");

            //Name of the new Subscription (association)
            string newSubscriptionName = "CSOM Subscription";

            //Workflow Lists
            string workflowHistoryListID = "5bc8227b-66a3-4e12-8055-846dcfb53cab";
            string taskListID = "a75e266c-5f20-4b83-9f95-10a42c629e84";

            using (ClientContext clientContext = new ClientContext(siteUrl))
            {
                SecureString securePassword = new SecureString();

                foreach (char c in password.ToCharArray()) securePassword.AppendChar(c);

                clientContext.Credentials = new SharePointOnlineCredentials(userName, securePassword);

                Web web = clientContext.Web;

                //Workflow Services Manager which will handle all the workflow interaction.
                WorkflowServicesManager wfServicesManager = new WorkflowServicesManager(clientContext, web);

                //Deployment Service which holds all the Workflow Definitions deployed to the site
                WorkflowDeploymentService wfDeploymentService = wfServicesManager.GetWorkflowDeploymentService();

                //Get all the definitions from the Deployment Service, or get a specific definition using the GetDefinition method.
                WorkflowDefinitionCollection wfDefinitions = wfDeploymentService.EnumerateDefinitions(false);

                clientContext.Load(wfDefinitions, wfDefs => wfDefs.Where(wfd => wfd.DisplayName == workflowName));

                clientContext.ExecuteQuery();

                WorkflowDefinition wfDefinition = wfDefinitions.First();

                //The Subscription service is used to get all the Associations currently on the SPSite
                WorkflowSubscriptionService wfSubscriptionService = wfServicesManager.GetWorkflowSubscriptionService();

                //The subscription (association)
                WorkflowSubscription wfSubscription = new WorkflowSubscription(clientContext);
                wfSubscription.DefinitionId = wfDefinition.Id;
                wfSubscription.Enabled = true;
                wfSubscription.Name = newSubscriptionName;

                var startupOptions = new List<string>();
                
                // automatic start
                startupOptions.Add("ItemAdded");
                startupOptions.Add("ItemUpdated");
                // manual start
                startupOptions.Add("WorkflowStart");

                // set the workflow start settings
                wfSubscription.EventTypes = startupOptions;

                // set the associated task and history lists
                wfSubscription.SetProperty("HistoryListId", workflowHistoryListID);
                
                wfSubscription.SetProperty("TaskListId", taskListID);
				
				//Create the Association
                wfSubscriptionService.PublishSubscriptionForList(wfSubscription, targetListGuid);

                clientContext.ExecuteQuery();
            }
        }
    }
}