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“Call HTTP Web Service” is new Action in Workflow manager (SharePoint Designer 2013). Before, it is difficult in SharePoint designer 2010 workflows to perform multiple operations like retrieve, pull ,perform batch operations etc in SharePoint list data.
It is relatively easy to create an OData web service for a SharePoint workflow WCF data service an OData service to be used by a workflow by using WCF Data services. You can review the walkthroughs and samples on creating web services at sites like WCF Data Services, www.OData.org, and others.
How to get items from SharePoint list using web service?
In the headers section of the extension, we need to set our “accept” to application/json;odata=verbose as shown in below figure. Click the Send button you will see the result in clear JSON as below: The screenshot above shows part of the response we received back from querying, as 3 items are returned in response of our query.
How to create and delete items in SharePoint?
To delete the item, the process is the same, except you set the method to DELETE. The same is true for updating an item, except for setting the method to POST. When you create an item, set the URL to the unique address of the collection where the item is to be created, and then set the method to POST.
Now comes the good news: In the world of SharePoint, when SharePoint Designer 2013 lacks an action that you need, all you need is to create a custom web service. And creating a custom web service is much easier than creating a custom action.
What does call HTTP web service action do?
Call HTTP Web Service Action allows you to call a web service from within your workflow. This provides you to consume data from an external web service as well query other SharePoint objects (Site,Web,List,etc..) by using SharePoint’s REST interface.
How to call REST API from SharePoint Designer workflow?
Requirement: Call REST API in SharePoint designer workflow. SharePoint Designer workflow actions are very limited, and we can utilize REST API calls to extend them. Here is how to call a REST API method from SharePoint Designer workflow action: Call HTTP Web Service.
How to set workflow status in SharePoint Designer?
Then set the index variable to be the IncrementCounter (Set Workflow Variable). Finally exit the loop and set the workflow status (Set Workflow Status action) to Finished. At the end of the stage, select Go to End of Workflow. Add some list item’s. Workflow started.