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Question

Multivalue Parameter with Workflow Web Service

Workflow
Updated March 2, 2015
asked on February 28, 2015

Using the Workflow Web Service, anyone know how to put multiple values into an InstanceParameterData object and have it populate a multivalue input parameter correctly?  I tried throwing a string[] into the value since it's an object, but I got a serialization error.  I also tried passing multiple values in a string, guessing what the delimiting character might be.  I tried a comma, semicolon, and pipe.  I'm ultimately trying to find a way to avoid having to parse the string on the workflow server to get all the values.
 

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Replies

replied on March 1, 2015

I figured out a work-around, but if you have a better suggestion, let me know.

 

1.  Passed the string delimited with a semi-colon.

2.  Parsed that input parameter, and put a object[] into another token.

3.  Used an Assign Field Values activity, and assigned the field to the new token - and it populated the multi-valued field correctly.

 

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replied on March 1, 2015

Hi Rich,

To pass multiple values, format your XML like this:

    <InstanceParameterData>    
      <Name>ADDRESS</Name>
      <Value xmlns:d10="http://schemas.microsoft.com/2003/10/Serialization/Arrays" i:type="d10:ArrayOfstring" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
        <d10:string>First Part of Address</d10:string>
        <d10:string>Second Part of Address</d10:string>
        <d10:string>Third Part of Address</d10:string>
</Value>
    </InstanceParameterData>

 

replied on March 1, 2015

Not using REST, though.  Talking about calling the Workflow Web Service via a service reference inside a .Net app.

replied on March 2, 2015

Hi Rich. Which version of Workflow are you using? This code seems to work for me in 9.2:

 

    class Program
    {
        static void Main(string[] args)
        {
            using (WorkflowAPIBaseClient WorkflowService = new WorkflowAPIBaseClient())
            {
                InstanceCreationData creationData = new InstanceCreationData();
                creationData.StartingEntry = new InstanceEntryData();
                creationData.Initiator = new InstanceUserData();                                
                                
                //Specify the parameters you want to pass to Workflow
                InstanceParameterData parameter1 = new InstanceParameterData();
                parameter1.Name = "My MV param";
                parameter1.Value = new string[] { "val 1", "val 2", "val 3" };

                InstanceParameterData parameter2 = new InstanceParameterData();
                parameter2.Name = "My SV param";
                parameter2.Value = "val a";

                creationData.ParameterCollection = new InstanceParameterCollection();
                creationData.ParameterCollection.Add(parameter1);
                creationData.ParameterCollection.Add(parameter2);                
                
                InstanceCreationResultData results = WorkflowService.CreateWorkflowInstance("Workflow 1", creationData);                
            }
        }
    }

 

Make sure that your input parameter is marked as Multi-value:

 

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