Workflow Agent Sample

Issue

Workflow Agent samples in C# using Capture .NET libraries.

Solution

Below is a sample Workflow Agent that processes after the Recognition Server module which simply writes out the Index Field values of all the Documents in the Batch to a text file.

First add references to the following Kofax Capture API DLLs:

Kofax.Capture.ACWFLib.dll
Kofax.Capture.SDK.Workflow.dll
Kofax.Capture.SDK.Data.dll

Some COM-related aspects exist and are required such as

In the project properties, assembly Info, COM Visible must be set to True. 

The same class attributes, (i.e., Guid, ClassInterface, ProgId), are required.

Following is the complete source code for the Workflow Agent.

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
using Kofax.Capture.ACWFLib;
using Kofax.Capture.SDK.Workflow;
using Kofax.Capture.SDK.Data;
namespace WFAExportValues
{
    [Guid("7F819B7B-7F21-4F5E-8699-51F09C93A088")]
    [ClassInterface(ClassInterfaceType.None)]
    [ProgId("WFAExportValues.ExportValues")]
    public class ExportValues : IACWorkflowAgent
    {
        public void ProcessWorkflow(ref IACWorkflowData oWorkflowData)
            {
                if (oWorkflowData.CurrentModule.ID.ToLower() == "fp.exe")
                {
                    try
                    {
                        IACDataElement oRoot = oWorkflowData.ExtractRuntimeACDataElement(0);
                        IACDataElement oBatch = oRoot.FindChildElementByName("Batch");
                        IACDataElement oDocument = oBatch.FindChildElementByName("Documents");
                        IACDataElementCollection oDocColl = oDocument.FindChildElementsByName("Document");
                        using (StreamWriter sw =
                            new StreamWriter(@"C:\ProgramData\Kofax\CaptureSV\Logs\WFAIndexData.txt", true))
                        {
                            foreach (IACDataElement oDoc in oDocColl)
                            {
                                IACDataElement oIndex = oDoc.FindChildElementByName("IndexFields");
                                IACDataElementCollection oIndexColl =
                                    oIndex.FindChildElementsByName("IndexField");
                                sw.WriteLine("Document: {0}", oDoc["UniqueID"].ToString());
                                foreach (IACDataElement oField in oIndexColl)
                                {
                                    sw.WriteLine("Name: {0}, Value: {1}", oField["Name"].ToString(),
                                        oField["Value"].ToString());
                                }
                                sw.WriteLine("----------------------------------------------------");
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        using (StreamWriter sw =
                        new StreamWriter(@"C:\ProgramData\Kofax\CaptureSV\Logs\WFAIndexData.txt", true))
                        {
                            sw.WriteLine("************************************");
                            sw.WriteLine("Error: {0}", ex.Message);
                            sw.WriteLine("************************************");
                        }
                   }
                }
            }
        }
    }

Level of Complexity 

High

Applies to  

References

-

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