public enum Gender{    Man = 1,    Woman}[Table("Users")]public class User{    [Column(IsPrimaryKey = true)]    [AutoIncrement]    public int Id { get; set; }    public string Name { get; set; }    public Gender? Gender { get; set; }    public int? Age { get; set; }    public int? CityId { get; set; }    public DateTime? OpTime { get; set; }}public class City{    [Column(IsPrimaryKey = true)]    public int Id { get; set; }    public string Name { get; set; }    public int ProvinceId { get; set; }}public class Province{    [Column(IsPrimaryKey = true)]    public int Id { get; set; }    public string Name { get; set; }}

IDbContext context = new MsSqlContext(DbHelper.ConnectionString);IQuery<User> q = context.Query<User>();

IQuery<User> q = context.Query<User>();q.Where(a => a.Id > 0).FirstOrDefault();q.Where(a => a.Id > 0).ToList();q.Where(a => a.Id > 0).OrderBy(a => a.Age).ToList();q.Where(a => a.Id > 0).Take(10).OrderBy(a => a.Age).ToList();q.Where(a => a.Id > 0).OrderBy(a => a.Age).ThenByDesc(a => a.Id).Select(a => new { a.Id, a.Name }).Skip(20).Take(10).ToList();/* * SELECT TOP (10) [T].[Id] AS [Id],[T].[Name] AS [Name] FROM (SELECT [Users].[Id] AS [Id],[Users].[Name] AS [Name],ROW_NUMBER() OVER(ORDER BY [Users].[Age] ASC,[Users].[Id] DESC) AS [ROW_NUMBER_0] FROM [Users] AS [Users] WHERE [Users].[Id] > 0) AS [T] WHERE [T].[ROW_NUMBER_0] > 20 */q.Where(a => a.Id > 0).Where(a => a.Name.Contains("lu")).ToList();/* * SELECT [Users].[Id] AS [Id],[Users].[Name] AS [Name],[Users].[Gender] AS [Gender],[Users].[Age] AS [Age],[Users].[CityId] AS [CityId],[Users].[OpTime] AS [OpTime]  * FROM [Users] AS [Users]  * WHERE ([Users].[Id] > 0 AND [Users].[Name] LIKE '%' + N'lu' + '%') */

MsSqlContext context = new MsSqlContext(DbHelper.ConnectionString);var user_city_province = context.Query<User>()                         .InnerJoin<City>((user, city) => user.CityId == city.Id)                         .InnerJoin<Province>((user, city, province) => city.ProvinceId == province.Id);user_city_province.Select((user, city, province) => new { UserId = user.Id, CityName = city.Name, ProvinceName = province.Name }).Where(a => a.UserId == 1).ToList();/* * SELECT [Users].[Id] AS [UserId],[City].[Name] AS [CityName],[Province].[Name] AS [ProvinceName]  * FROM [Users] AS [Users]  * INNER JOIN [City] AS [City] ON [Users].[CityId] = [City].[Id]  * INNER JOIN [Province] AS [Province] ON [City].[ProvinceId] = [Province].[Id]  * WHERE [Users].[Id] = 1 */ var view = user_city_province.Select((user, city, province) => new { User = user, City = city, Province = province }); view.Where(a => a.User.Id == 1).ToList();/* * SELECT [Users].[Id] AS [Id],[Users].[Name] AS [Name],[Users].[Gender] AS [Gender],[Users].[Age] AS [Age],[Users].[CityId] AS [CityId],[Users].[OpTime] AS [OpTime],[City].[Id] AS [Id0],[City].[Name] AS [Name0],[City].[ProvinceId] AS [ProvinceId],[Province].[Id] AS [Id1],[Province].[Name] AS [Name1]  * FROM [Users] AS [Users]  * INNER JOIN [City] AS [City] ON [Users].[CityId] = [City].[Id]  * INNER JOIN [Province] AS [Province] ON [City].[ProvinceId] = [Province].[Id]  * WHERE [Users].[Id] = 1 */ view.Where(a => a.User.Id == 1).Select(a => new { UserId = a.User.Id, CityName = a.City.Name, ProvinceName = a.Province.Name }).ToList();/* * SELECT [Users].[Id] AS [UserId],[City].[Name] AS [CityName],[Province].[Name] AS [ProvinceName]  * FROM [Users] AS [Users]  * INNER JOIN [City] AS [City] ON [Users].[CityId] = [City].[Id]  * INNER JOIN [Province] AS [Province] ON [City].[ProvinceId] = [Province].[Id]  * WHERE [Users].[Id] = 1 *//* * Chloe also supports left join,right join and full join query. * For details please see 'https://github.com/shuxinqin/Chloe/blob/master/src/Chloe/IQuery%60.cs'. */

IQuery<User> q = context.Query<User>();IGroupingQuery<User> g = q.Where(a => a.Id > 0).GroupBy(a => a.Age);g = g.Having(a => a.Age > 1 && Sql.Count() > 0);g.Select(a => new { a.Age, Count = Sql.Count(), Sum = Sql.Sum(a.Age), Max = Sql.Max(a.Age), Min = Sql.Min(a.Age), Avg = Sql.Average(a.Age) }).ToList();/* * SELECT [Users].[Age] AS [Age],COUNT(1) AS [Count],SUM([Users].[Age]) AS [Sum],MAX([Users].[Age]) AS [Max],MIN([Users].[Age]) AS [Min],CAST(AVG([Users].[Age]) AS FLOAT) AS [Avg]  * FROM [Users] AS [Users]  * WHERE [Users].[Id] > 0  * GROUP BY [Users].[Age] HAVING ([Users].[Age] > 1 AND COUNT(1) > 0) */

context.SqlQuery<User>("select Id,Name,Age from Users where Name=@name", DbParam.Create("@name", "lu")).ToList();context.SqlQuery<int>("select Id from Users").ToList();

IQuery<User> q = context.Query<User>();q.Select(a => Sql.Count()).First();/* * SELECT TOP (1) COUNT(1) AS [C] FROM [Users] AS [Users] */q.Select(a => new { Count = Sql.Count(), LongCount = Sql.LongCount(), Sum = Sql.Sum(a.Age), Max = Sql.Max(a.Age), Min = Sql.Min(a.Age), Average = Sql.Average(a.Age) }).First();/* * SELECT TOP (1) COUNT(1) AS [Count],COUNT_BIG(1) AS [LongCount],SUM([Users].[Age]) AS [Sum],MAX([Users].[Age]) AS [Max],MIN([Users].[Age]) AS [Min],CAST(AVG([Users].[Age]) AS FLOAT) AS [Average]  * FROM [Users] AS [Users] */var count = q.Count();/* * SELECT COUNT(1) AS [C] FROM [Users] AS [Users] */var longCount = q.LongCount();/* * SELECT COUNT_BIG(1) AS [C] FROM [Users] AS [Users] */var sum = q.Sum(a => a.Age);/* * SELECT SUM([Users].[Age]) AS [C] FROM [Users] AS [Users] */var max = q.Max(a => a.Age);/* * SELECT MAX([Users].[Age]) AS [C] FROM [Users] AS [Users] */var min = q.Min(a => a.Age);/* * SELECT MIN([Users].[Age]) AS [C] FROM [Users] AS [Users] */var avg = q.Average(a => a.Age);/* * SELECT CAST(AVG([Users].[Age]) AS FLOAT) AS [C] FROM [Users] AS [Users] */

IQuery<User> q = context.Query<User>();var space = new char[] { ' ' };DateTime startTime = DateTime.Now;DateTime endTime = DateTime.Now.AddDays(1);q.Select(a => new{    Id = a.Id,    String_Length = (int?)a.Name.Length,//LEN([Users].[Name])    Substring = a.Name.Substring(0),//SUBSTRING([Users].[Name],0 + 1,LEN([Users].[Name]))    Substring1 = a.Name.Substring(1),//SUBSTRING([Users].[Name],1 + 1,LEN([Users].[Name]))    Substring1_2 = a.Name.Substring(1, 2),//SUBSTRING([Users].[Name],1 + 1,2)    ToLower = a.Name.ToLower(),//LOWER([Users].[Name])    ToUpper = a.Name.ToUpper(),//UPPER([Users].[Name])    IsNullOrEmpty = string.IsNullOrEmpty(a.Name),//too long    Contains = (bool?)a.Name.Contains("s"),//    Trim = a.Name.Trim(),//RTRIM(LTRIM([Users].[Name]))    TrimStart = a.Name.TrimStart(space),//LTRIM([Users].[Name])    TrimEnd = a.Name.TrimEnd(space),//RTRIM([Users].[Name])    StartsWith = (bool?)a.Name.StartsWith("s"),//    EndsWith = (bool?)a.Name.EndsWith("s"),//    DiffYears = Sql.DiffYears(startTime, endTime),//DATEDIFF(YEAR,@P_0,@P_1)    DiffMonths = Sql.DiffMonths(startTime, endTime),//DATEDIFF(MONTH,@P_0,@P_1)    DiffDays = Sql.DiffDays(startTime, endTime),//DATEDIFF(DAY,@P_0,@P_1)    DiffHours = Sql.DiffHours(startTime, endTime),//DATEDIFF(HOUR,@P_0,@P_1)    DiffMinutes = Sql.DiffMinutes(startTime, endTime),//DATEDIFF(MINUTE,@P_0,@P_1)    DiffSeconds = Sql.DiffSeconds(startTime, endTime),//DATEDIFF(SECOND,@P_0,@P_1)    DiffMilliseconds = Sql.DiffMilliseconds(startTime, endTime),//DATEDIFF(MILLISECOND,@P_0,@P_1)    //DiffMicroseconds = Sql.DiffMicroseconds(startTime, endTime),//DATEDIFF(MICROSECOND,@P_0,@P_1)  Exception    AddYears = startTime.AddYears(1),//DATEADD(YEAR,1,@P_0)    AddMonths = startTime.AddMonths(1),//DATEADD(MONTH,1,@P_0)    AddDays = startTime.AddDays(1),//DATEADD(DAY,1,@P_0)    AddHours = startTime.AddHours(1),//DATEADD(HOUR,1,@P_0)    AddMinutes = startTime.AddMinutes(2),//DATEADD(MINUTE,2,@P_0)    AddSeconds = startTime.AddSeconds(120),//DATEADD(SECOND,120,@P_0)    AddMilliseconds = startTime.AddMilliseconds(20000),//DATEADD(MILLISECOND,20000,@P_0)	    Now = DateTime.Now,//GETDATE()    UtcNow = DateTime.UtcNow,//GETUTCDATE()    Today = DateTime.Today,//CAST(GETDATE() AS DATE)    Date = DateTime.Now.Date,//CAST(GETDATE() AS DATE)    Year = DateTime.Now.Year,//DATEPART(YEAR,GETDATE())    Month = DateTime.Now.Month,//DATEPART(MONTH,GETDATE())    Day = DateTime.Now.Day,//DATEPART(DAY,GETDATE())    Hour = DateTime.Now.Hour,//DATEPART(HOUR,GETDATE())    Minute = DateTime.Now.Minute,//DATEPART(MINUTE,GETDATE())    Second = DateTime.Now.Second,//DATEPART(SECOND,GETDATE())    Millisecond = DateTime.Now.Millisecond,//DATEPART(MILLISECOND,GETDATE())    DayOfWeek = DateTime.Now.DayOfWeek,//(DATEPART(WEEKDAY,GETDATE()) - 1)    Int_Parse = int.Parse("1"),//CAST(N'1' AS INT)    Int16_Parse = Int16.Parse("11"),//CAST(N'11' AS SMALLINT)    Long_Parse = long.Parse("2"),//CAST(N'2' AS BIGINT)    Double_Parse = double.Parse("3"),//CAST(N'3' AS FLOAT)    Float_Parse = float.Parse("4"),//CAST(N'4' AS REAL)    //Decimal_Parse = decimal.Parse("5"),//CAST(N'5' AS DECIMAL)  ps: 'Decimal.Parse(string s)' is not supported now,because we don't know the precision and scale information.    Guid_Parse = Guid.Parse("D544BC4C-739E-4CD3-A3D3-7BF803FCE179"),//CAST(N'D544BC4C-739E-4CD3-A3D3-7BF803FCE179' AS UNIQUEIDENTIFIER) AS [Guid_Parse]    Bool_Parse = bool.Parse("1"),//CASE WHEN CAST(N'1' AS BIT) = CAST(1 AS BIT) THEN CAST(1 AS BIT) WHEN NOT (CAST(N'1' AS BIT) = CAST(1 AS BIT)) THEN CAST(0 AS BIT) ELSE NULL END AS [Bool_Parse]    DateTime_Parse = DateTime.Parse("1949-10-01"),//CAST(N'1949-10-01' AS DATETIME) AS [DateTime_Parse]    B = a.Age == null ? false : a.Age > 1,}).ToList();

IDbContext context = new MsSqlContext(DbHelper.ConnectionString);//return the key valueint id = (int)context.Insert<User>(() => new User() { Name = "lu", Age = 18, Gender = Gender.Man, CityId = 1, OpTime = DateTime.Now });/* * INSERT INTO [Users]([Name],[Age],[Gender],[CityId],[OpTime]) VALUES(N'lu',18,1,1,GETDATE());SELECT @@IDENTITY */User user = new User();user.Name = "lu";user.Age = 18;user.Gender = Gender.Man;user.CityId = 1;user.OpTime = new DateTime(1970, 1, 1);user = context.Insert(user);/* * String @P_0 = "lu";   Gender @P_1 = Man;   Int32 @P_2 = 18;   Int32 @P_3 = 1;   DateTime @P_4 = "1970/1/1 0:00:00";   INSERT INTO [Users]([Name],[Gender],[Age],[CityId],[OpTime]) VALUES(@P_0,@P_1,@P_2,@P_3,@P_4);SELECT @@IDENTITY */

MsSqlContext context = new MsSqlContext(DbHelper.ConnectionString);context.Update<User>(a => a.Id == 1, a => new User() { Name = a.Name, Age = a.Age + 1, Gender = Gender.Man, OpTime = DateTime.Now });/* * UPDATE [Users] SET [Name]=[Users].[Name],[Age]=([Users].[Age] + 1),[Gender]=1,[OpTime]=GETDATE() WHERE [Users].[Id] = 1 */context.Update<User>(a => a.Gender == Gender.Woman, a => new User() { Age = a.Age - 1, OpTime = DateTime.Now });/* * UPDATE [Users] SET [Age]=([Users].[Age] - 1),[OpTime]=GETDATE() WHERE [Users].[Gender] = 2 */User user = new User();user.Id = 1;user.Name = "lu";user.Age = 28;user.Gender = Gender.Man;user.OpTime = DateTime.Now;context.Update(user); //update all columns/* * String @P_0 = "lu";   Gender @P_1 = Man;   Int32 @P_2 = 28;   Nullable<Int32> @P_3 = NULL;   DateTime @P_4 = "2016/7/8 11:28:27";   Int32 @P_5 = 1;   UPDATE [Users] SET [Name]=@P_0,[Gender]=@P_1,[Age]=@P_2,[CityId]=@P_3,[OpTime]=@P_4 WHERE [Users].[Id] = @P_5 */context.TrackEntity(user);//track entityuser.Name = user.Name + "1";context.Update(user);//update the column 'Name' only/* * String @P_0 = "lu1";   Int32 @P_1 = 1;   UPDATE [Users] SET [Name]=@P_0 WHERE [Users].[Id] = @P_1 */

MsSqlContext context = new MsSqlContext(DbHelper.ConnectionString);context.Delete<U