Write a custom workflow in MSCRM

Example of a simple custom workflow for Mscrm

Custom workflow in Dynamics 365, D365 Custom workflow

This simple workflow is taking the input parameters and returning the value of a custom configuration entity in MSCRM. This workflow will help you understand and build your own custom logic.

using System;
using System.Linq;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Workflow;
using Microsoft.Xrm.Sdk.Query;
using System.Activities;
using System.ServiceModel;

namespace Example.CRM.WorkFlow
{
    ///summary
    /// Custom Action to Get the Configuration Values
    /// 

    public class GetConfigurationValues : CodeActivity
    {
        #region Input Parameters
        #endregion

        #region Output Parameters

        [Output("Configuration Entity")]
        [ReferenceTarget("new_configuration")]
        public OutArgument OutputConfigValue { get; set; }
        [Input("Contact Name :")]
        [ReferenceTarget("contact")]
        public InArgument SingleContact { get; set; }
        [Input("Marketing List :")]
        [ReferenceTarget("list")]
        public InArgument MarketingList { get; set; }
        [RequiredArgument]
        [Input("FieldName")]
        [Default("")]
        public InArgument FieldName { get; set; }
        #endregion

        #region GetConfiguration Values

        protected override void Execute(CodeActivityContext executionContext)
        {

            #region Service Declaration
            /// Create the tracing service
            ITracingService tracingService = executionContext.GetExtension();
            if (tracingService == null)
                throw new InvalidWorkflowException("Failed to retrieve tracing service.");

            /// Create the context
            IWorkflowContext context = executionContext.GetExtension();
            if (context == null)
                throw new InvalidWorkflowException("Failed to retrieve workflow context.");

            IOrganizationServiceFactory serviceFactory = executionContext.GetExtension();
            IOrganizationService service = serviceFactory.CreateOrganizationService(context.UserId);
            #endregion

            try
            {
string fieldValue= FieldName.Get(executionContext);
                QueryByAttribute query = new QueryByAttribute("new_configuration");
                query.AddAttributeValue("new_name", FieldValue);
                query.AddAttributeValue("statecode", 0);
                query.ColumnSet = new ColumnSet("new_configurationid");
                EntityCollection configCollection = service.RetrieveMultiple(query);

                if (configCollection.Entities.ToList().Count() > 0)
                {
                    Entities.new_configuration config = (Entities.new_configuration)configCollection.Entities.ToList().First();
                    EntityReference configRefer = new EntityReference("new_configuration", config.Id);
                    OutputConfigValue.Set(executionContext, configRefer);
                }
            }
            catch (FaultException e)
            {
                throw new InvalidWorkflowException("Exeception in GetConfigurationValues Custom Workflow -" + e.Detail + e.InnerException);
            }
            catch (Exception ex)
            {
                throw new InvalidWorkflowException("Exeception in GetConfigurationValues Custom Workflow -" + ex.Message + ex.InnerException);

            }
        }
        #endregion
    }
}