Using Rest API call to start workflow with parameters in Sharepoint Designer 2013


  • I'm currently trying to call a 2013 workflow from another 2013 workflow using the Call HTTP Web Service action. I set a Post request to ".../_api/SP.WorkflowServices.WorkflowInstanceService.Current/StartWorkflowOnListItemBySubscriptionId(subscriptionId='[variable:wkflw_id]',itemId='1')."

    Everything work fine for that call. The trouble is that I need to send a number as the parameter for the workflow being called.

    Using a Dictionary as the request body didn't work. I build a Dictionary that convert into {"__metadata":{"type":"SP.KeyValue"},"Key":"client_col_num","Value":1,"ValueType":"Edm.Int32"}. When I add that Dictionary as the value for the "payload" key of the request body Dictionary, the call returns "startObject found when expected startArray node" error. The body need to be {"payload": [{...}]} but got {"payload": {...}} instead.

    Changing the Post request to ".../StartWorkflowOnListItemBySubscriptionId(subscriptionId='...',itemId='1',payload='[{"__metadata":{"type":"SP.KeyValue"},"Key":"client_col_num","Value":1,"ValueType":"Edm.Int32"}]')" result in a BadRequest error with an empty message.

    Monday, December 19, 2016 9:55 PM

All replies

  • Hi,

    Could you talk more about your scenario?

    Suppose you want wf1 to trigger wf2. Could you tell us what does wf1/wf2 do? And what’s parameter you want to use in wf2?


    Dean Wang

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    Wednesday, December 21, 2016 11:30 AM
  • Hi Dean, i'm with the same error.

    I have a SharePoint Online Workflow configured with initialization parameters and i want to start this workflow from another workflow by "Call Http Web Services". I see this post that uses another way to process request passing parameter on "RequestContent" from Parameter for "Request".

    I tried to execute this ajax script but it dosen't work.

    I can start a workflow using this approach applied in Workflow using a Http Call, but Initialization Parameter is not being overwritten.

    So, second workflow that just Log a message to history, it shows Default Value of Parameter.

    Do you have some idea to resolve it?

    Friday, June 23, 2017 6:48 PM