win-service-machine-dll/ESCARLETPrint/ESCARLETPrint.cs

using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace ESCARLETPrint
{
    public class ESCARLETPrint
    {
        /// <summary>
        /// 电子发票网址打印
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public string PrintESCARLETUrl(string input)
        {
            System.Diagnostics.Debugger.Launch();
            String errorCode = "0";
            String errorMessage = "";
            JObject output = new JObject();
            JArray fileStringArray = new JArray();
            try
            {
                Thread thread;
                dynamic inputobj = Newtonsoft.Json.JsonConvert.DeserializeObject<dynamic>(input);
                var paramsobj = inputobj["params"][0];
                thread = new Thread(() => Print());
                thread.SetApartmentState(ApartmentState.STA); //重点
                thread.Start();
                thread.Join();
            }
            catch (Exception ex)
            {
                errorMessage = ex.Message;
            }
            output.Add("errorCode", errorCode);
            output.Add("errorMessage", errorMessage);
            return output.ToString();

        }
        private JObject Print()
        {
            JObject output = new JObject();
            try
            {
                for (int i = 0; i < 50; i++)
                {
                    Thread.Sleep(500);
                }

            }
            catch (Exception ex2)
            {
            }
            return output;
        }
    }
}