背景通過(guò)多個(gè)部門(mén)id獲取所有用戶，部門(mén)和用戶是多對(duì)多。 已知部門(mén)id，獲取該部門(mén)包括該部門(mén)下的所有子部門(mén)的所有用戶。 關(guān)系如下： public class Entity:IEntity { public Guid Id { get; set; } public string CreateUser { get; set; } public DateTime CreateTime { get; set; } public string ModifyUser { get; set; } public DateTime? ModifyTime { get; set; } [Timestamp] public Byte[] RowVersion { get; set; } } //組織架構(gòu) public class WMS_Org : Entity { public WMS_Org() { } public string OrgName { get; set; } public string OrgDesc { get; set; } public int OrgOrder { get; set; } public string OrgFatherId { get; set; } public virtual ICollection<WMS_OrgUser> OrgUserIds { get; set; } } //用戶 public class WMS_User : Entity { public WMS_User() { } public string UserName { get; set; } public string NickName { get; set; } public string UserPwd { get; set; } public string Sex { get; set; } public string Phone { get; set; } public string Email { get; set; } public string QQ { get; set; } public string Address { get; set; } public string Remark { get; set; } public virtual ICollection<WMS_OrgUser> UserOrgIds { get; set; } } //組織架構(gòu)和用戶的關(guān)聯(lián) public class WMS_OrgUser : Entity { public WMS_OrgUser() { } public Guid OrgId { get; set; } [ForeignKey("OrgId")] public virtual WMS_Org Org { get; set; } public Guid UserId { get; set; } [ForeignKey("UserId")] public virtual WMS_User User { get; set; } } 已知組織的id
如上圖，我單擊0100組織架構(gòu)，要獲取該組織架構(gòu)下的所有用戶，首先由于用戶是掛載到每個(gè)節(jié)點(diǎn)上的，所有需要事先遍歷獲取所有的子節(jié)點(diǎn)獲取節(jié)點(diǎn)的id 放到Guid[]數(shù)組里 提交后臺(tái)查詢//DBSET=DbSet<WMS_User>，ids=Guid[] ids參數(shù) //第一種方式All DBSET.Where(p => p.UserOrgIds.All(o=>ids.Contains(o.OrgId))); //第二種方式Any DBSET.Where(p => p.UserOrgIds.Any(o=>ids.Contains(o.OrgId))); 注意EF采用Contains構(gòu)造in的sql語(yǔ)句 很直觀的可以看出兩個(gè)區(qū)別，一個(gè)是All，一個(gè)Any，那么產(chǎn)生的sql有什么區(qū)別呢？ //All，EF產(chǎn)生的是inner Join SELECT 1 AS [C1], [Extent1].[Id] AS [Id], [Extent1].[OrgId] AS [OrgId], [Extent1].[UserId] AS [UserId], [Extent1].[CreateUser] AS [CreateUser], [Extent1].[CreateTime] AS [CreateTime], [Extent1].[ModifyUser] AS [ModifyUser], [Extent1].[ModifyTime] AS [ModifyTime], [Extent1].[RowVersion] AS [RowVersion], [Extent2].[Id] AS [Id1], [Extent2].[UserName] AS [UserName], [Extent2].[NickName] AS [NickName], [Extent2].[UserPwd] AS [UserPwd], [Extent2].[Sex] AS [Sex], [Extent2].[Phone] AS [Phone], [Extent2].[Email] AS [Email], [Extent2].[QQ] AS [QQ], [Extent2].[Address] AS [Address], [Extent2].[Remark] AS [Remark], [Extent2].[CreateUser] AS [CreateUser1], [Extent2].[CreateTime] AS [CreateTime1], [Extent2].[ModifyUser] AS [ModifyUser1], [Extent2].[ModifyTime] AS [ModifyTime1], [Extent2].[RowVersion] AS [RowVersion1] FROM [dbo].[WMS_OrgUser] AS [Extent1] INNER JOIN [dbo].[WMS_User] AS [Extent2] ON [Extent1].[UserId] = [Extent2].[Id] WHERE [Extent1].[OrgId] IN (cast('bd3c010c-476f-45e6-8d83-ad741cc55309' as uniqueidentifier), cast('4e108b91-be3c-4cf4-a074-3767b9b8c7dc' as uniqueidentifier), cast('1cc15f8c-3758-47d3-862a-5287ab5d0651' as uniqueidentifier), cast('e1bf6f5a-800a-4fd4-9309-576c1d84ba2f' as uniqueidentifier), cast('a436b8a9-4b3a-4bf9-bbdd-839571e03915' as uniqueidentifier), cast('b0d6aead-e72f-4fd5-b2cd-e575454d3a4c' as uniqueidentifier), cast('79ddb55a-1587-4928-a312-58da0c091459' as uniqueidentifier), cast('618de87e-2d97-4c0a-b6c1-acd072c305e2' as uniqueidentifier)) //Any方式,EF生成的Exists SELECT [Extent1].[Id] AS [Id], [Extent1].[UserName] AS [UserName], [Extent1].[NickName] AS [NickName], [Extent1].[UserPwd] AS [UserPwd], [Extent1].[Sex] AS [Sex], [Extent1].[Phone] AS [Phone], [Extent1].[Email] AS [Email], [Extent1].[QQ] AS [QQ], [Extent1].[Address] AS [Address], [Extent1].[Remark] AS [Remark], [Extent1].[CreateUser] AS [CreateUser], [Extent1].[CreateTime] AS [CreateTime], [Extent1].[ModifyUser] AS [ModifyUser], [Extent1].[ModifyTime] AS [ModifyTime], [Extent1].[RowVersion] AS [RowVersion] FROM [dbo].[WMS_User] AS [Extent1] WHERE EXISTS (SELECT 1 AS [C1] FROM [dbo].[WMS_OrgUser] AS [Extent2] WHERE ([Extent1].[Id] = [Extent2].[UserId]) AND ([Extent2].[OrgId] IN (cast('bd3c010c-476f-45e6-8d83-ad741cc55309' as uniqueidentifier), cast('4e108b91-be3c-4cf4-a074-3767b9b8c7dc' as uniqueidentifier), cast('1cc15f8c-3758-47d3-862a-5287ab5d0651' as uniqueidentifier), cast('e1bf6f5a-800a-4fd4-9309-576c1d84ba2f' as uniqueidentifier), cast('a436b8a9-4b3a-4bf9-bbdd-839571e03915' as uniqueidentifier), cast('b0d6aead-e72f-4fd5-b2cd-e575454d3a4c' as uniqueidentifier), cast('79ddb55a-1587-4928-a312-58da0c091459' as uniqueidentifier), cast('618de87e-2d97-4c0a-b6c1-acd072c305e2' as uniqueidentifier))) ) 條件關(guān)聯(lián)查詢，并實(shí)現(xiàn)分頁(yè)var list = dal.FindByPage(start, pageSize, u => u.OrderByDescending(c => c.CreateTime), u => u.UserOrgIds.All(o => ids.Contains(o.OrgId)), out total); //防止轉(zhuǎn)json時(shí)候嵌套異常 var result = from f in list select new { Id = f.Id, UserName = f.UserName, Address = f.Address, Email = f.Email, Sex = f.Sex, CreateUser = f.CreateUser, CreateTime = f.CreateTime, NickName = f.NickName, Phone = f.Phone, QQ = f.QQ, Remark = f.Remark, UserPwd = f.UserPwd }; return result;
public virtual IEnumerable<T> FindByPage(int startIndex, int pageSize, Func<IQueryable<T>, IOrderedQueryable<T>> order, Expression<Func<T, bool>> filters, out int Total) { try { IQueryable<T> rs = order(DBSET.Where(filters)); Total = rs.Count(); if (startIndex < 0 || pageSize < 1) { return null;// rs.ToList(); } else { return rs.Skip(startIndex * pageSize).Take(pageSize).ToList(); } } catch (Exception e) { Total = 0; log.Error("FindByPage:" + order.ToString() + " " + filters.ToString() + " " + e.Message); return null; } }
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