Generate case title custom value in dynamic crm

Link:https://youtu.be/bisoBaAFIXc You can also check the video on youtube.

Scenario : Once you click on new case. case title should be populate as "2020-01-0001". 2020 is the present year and 01 is the current month and 0001 is the number of case is created.

Create one filed called "currentNumber(data type as a single line of text)" in configuration setting entity.

using Microsoft.Xrm.Sdk;

using Microsoft.Xrm.Sdk.Query;

using System;

using System.Collections.Generic;

using System.Globalization;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

namespace AutoNumberExample

{

    public class CaseAutonumber : IPlugin

    {

      public void Execute(IServiceProvider serviceProvider)

        {

            try

            {

                IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));

                if (context.InputParameters.Contains("Target") && context.InputParameters["Target"] is Entity)

                {

                    IOrganizationServiceFactory factory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));

                    IOrganizationService service = factory.CreateOrganizationService(context.UserId);

                    ITracingService tracing = (ITracingService)serviceProvider.GetService(typeof(ITracingService));

                    if (context.MessageName.ToLower() != "create" && context.Stage != 20)

                    {

                        return;

                    }

                    Entity targetEntity = context.InputParameters["Target"] as Entity;

                    Entity updateAutoNumberConfig = new Entity("cai_configurationsettings");

                    StringBuilder autoNumber = new StringBuilder();

                    string current, year, month;

                    DateTime today = DateTime.Now;

                    month = today.Month.ToString("00");

                    year = today.Year.ToString();

                    QueryExpression qeAutoNumberConfig = new QueryExpression { EntityName = "cai_configurationsettings", ColumnSet = new ColumnSet("cai_currentnumber") };

                    EntityCollection ecAutoNumber = service.RetrieveMultiple(qeAutoNumberConfig);

                    if (ecAutoNumber.Entities.Count == 0)

                    {

                        return;

                    }

                    foreach (Entity entity in ecAutoNumber.Entities)

                    {

                        if (ecAutoNumber.Entities.Count > 0)

                        {

                           // suffix = entity.GetAttributeValue<string>("cai_suffixnumber");

                            current = entity.GetAttributeValue<string>("cai_currentnumber");

                            int tempCurrent = int.Parse(current);

                            tempCurrent++;

                            current = tempCurrent.ToString("0000");

                            updateAutoNumberConfig.Id = entity.Id;

                            updateAutoNumberConfig["cai_currentnumber"] = current;

                            service.Update(updateAutoNumberConfig);

                            autoNumber.Append(year+"-"+month+"-"+ current);

                            break;

                        }

                    }

                    targetEntity["ticketnumber"] = autoNumber.ToString();

                }

            }

            catch (Exception ex)

            {

                throw new InvalidPluginExecutionException("An error occured in Autonumber Plugin: " + ex.Message.ToString(), ex);

            }

           

            

        }

    }

}