Himall.Service/TopicService.cs

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using Himall.Core;
using Himall.Core.Helper;
using Himall.Entity;
using Himall.IServices;
using Himall.IServices.QueryModel;
using Himall.Model;
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Runtime.CompilerServices;
using System.Transactions;

namespace Himall.Service
{
	public class TopicService : ServiceBase, ITopicService, IService, IDisposable
	{
		public TopicService()
		{
		}

		public void AddTopic(TopicInfo topicInfo)
		{
			if (string.IsNullOrWhiteSpace(topicInfo.Name))
			{
				throw new ArgumentNullException("专题名称不能为空");
			}
			string empty = string.Empty;
			TransactionScope transactionScope = new TransactionScope();
			try
			{
				try
				{
                    context.TopicInfo.Add(topicInfo);
                    context.SaveChanges();
					string topImage = topicInfo.TopImage;
					string backgroundImage = topicInfo.BackgroundImage;
					string frontCoverImage = topicInfo.FrontCoverImage;
					empty = MoveImages(topicInfo.Id, ref backgroundImage, ref topImage, ref frontCoverImage);
					topicInfo.TopImage = topImage;
					topicInfo.BackgroundImage = backgroundImage;
					topicInfo.FrontCoverImage = frontCoverImage;
                    context.SaveChanges();
					transactionScope.Complete();
				}
				catch (Exception exception1)
				{
					Exception exception = exception1;
					if (!string.IsNullOrWhiteSpace(empty))
					{
						try
						{
							Directory.Delete(empty);
						}
						catch
						{
						}
					}