public static void Method()
{
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 = DbFunctions.DiffYears(startTime, endTime), //DATEDIFF(YEAR,@P_0,@P_1)
DiffMonths = DbFunctions.DiffMonths(startTime, endTime), //DATEDIFF(MONTH,@P_0,@P_1)
DiffDays = DbFunctions.DiffDays(startTime, endTime), //DATEDIFF(DAY,@P_0,@P_1)
DiffHours = DbFunctions.DiffHours(startTime, endTime), //DATEDIFF(HOUR,@P_0,@P_1)
DiffMinutes = DbFunctions.DiffMinutes(startTime, endTime), //DATEDIFF(MINUTE,@P_0,@P_1)
DiffSeconds = DbFunctions.DiffSeconds(startTime, endTime), //DATEDIFF(SECOND,@P_0,@P_1)
DiffMilliseconds = DbFunctions.DiffMilliseconds(startTime, endTime), //DATEDIFF(MILLISECOND,@P_0,@P_1)
//DiffMicroseconds = DbFunctions.DiffMicroseconds(startTime, endTime),//DATEDIFF(MICROSECOND,@P_0,@P_1) Exception
/* No longer support method 'DateTime.Subtract(DateTime d)', instead of using 'DbFunctions.DiffXX' */
//SubtractTotalDays = endTime.Subtract(startTime).TotalDays,//CAST(DATEDIFF(DAY,@P_0,@P_1)
//SubtractTotalHours = endTime.Subtract(startTime).TotalHours,//CAST(DATEDIFF(HOUR,@P_0,@P_1)
//SubtractTotalMinutes = endTime.Subtract(startTime).TotalMinutes,//CAST(DATEDIFF(MINUTE,@P_0,@P_1)
//SubtractTotalSeconds = endTime.Subtract(startTime).TotalSeconds,//CAST(DATEDIFF(SECOND,@P_0,@P_1)
//SubtractTotalMilliseconds = endTime.Subtract(startTime).TotalMilliseconds,//CAST(DATEDIFF(MILLISECOND,@P_0,@P_1)
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("1992-1-16"), //CAST(N'1992-1-16' AS DATETIME) AS [DateTime_Parse]
B = a.Age == null ? false : a.Age > 1,
}).ToList();
ConsoleHelper.WriteLineAndReadKey();
}
public static void MethodTest()
{
MsSqlContext context = new MsSqlContext(DbHelper.ConnectionString);
var q = context.Query <User>();
var space = new char[] { ' ' };
DateTime startTime = DateTime.Now;
DateTime endTime = DateTime.Now.AddDays(1);
var xxxx = q.Select(a => new
{
Id = a.Id,
String_Length = a.Name.Length,
Substring = a.Name.Substring(0),
Substring1 = a.Name.Substring(1),
Substring1_2 = a.Name.Substring(1, 2),
ToLower = a.Name.ToLower(),
ToUpper = a.Name.ToUpper(),
IsNullOrEmpty = string.IsNullOrEmpty(a.Name),
Contains = (bool?)a.Name.Contains("s"),
Trim = a.Name.Trim(),
TrimStart = a.Name.TrimStart(space),
TrimEnd = a.Name.TrimEnd(space),
StartsWith = (bool?)a.Name.StartsWith("s"),
EndsWith = (bool?)a.Name.EndsWith("s"),
DiffYears = DbFunctions.DiffYears(startTime, endTime),
DiffMonths = DbFunctions.DiffMonths(startTime, endTime),
DiffDays = DbFunctions.DiffDays(startTime, endTime),
DiffHours = DbFunctions.DiffHours(startTime, endTime),
DiffMinutes = DbFunctions.DiffMinutes(startTime, endTime),
DiffSeconds = DbFunctions.DiffSeconds(startTime, endTime),
DiffMilliseconds = DbFunctions.DiffMilliseconds(startTime, endTime),
//DiffMicroseconds = DbFunctions.DiffMicroseconds(startTime, endTime),//Exception
/* No longer support method 'DateTime.Subtract(DateTime d)', instead of using 'DbFunctions.DiffXX' */
//SubtractTotalDays = endTime.Subtract(startTime).TotalDays,
//SubtractTotalHours = endTime.Subtract(startTime).TotalHours,
//SubtractTotalMinutes = endTime.Subtract(startTime).TotalMinutes,
//SubtractTotalSeconds = endTime.Subtract(startTime).TotalSeconds,
//SubtractTotalMilliseconds = endTime.Subtract(startTime).TotalMilliseconds,
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,
UtcNow = DateTime.UtcNow,
Today = DateTime.Today,
Date = DateTime.Now.Date,
Year = DateTime.Now.Year,
Month = DateTime.Now.Month,
Day = DateTime.Now.Day,
Hour = DateTime.Now.Hour,
Minute = DateTime.Now.Minute,
Second = DateTime.Now.Second,
Millisecond = DateTime.Now.Millisecond,
DayOfWeek = DateTime.Now.DayOfWeek,
Int_Parse = int.Parse("1"),
Int16_Parse = Int16.Parse("11"),
Long_Parse = long.Parse("2"),
Double_Parse = double.Parse("3"),
Float_Parse = float.Parse("4"),
//Decimal_Parse = decimal.Parse("5"),//'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"),
Bool_Parse = bool.Parse("1"),
DateTime_Parse = DateTime.Parse("2014-1-1"),
B = a.Age == null ? false : a.Age > 1,
}).ToList();
ConsoleHelper.WriteLineAndReadKey();
}
