Question

Is it possible to use the CE Database’s built-in functions such as those math functions POWER, SIN, COS in WP7’s LINQ to SQL? I couldn’t find any samples on the web.

Answer 1

The following statement will be fully translated to SQL:

TblUsers.OrderBy (tu => Math.Pow(tu.PkUserID, 5))

Output

DECLARE @p0 Float = 5

SELECT ...
FROM [tblUser] AS [t0]
ORDER BY POWER(CONVERT(Float,[t0].[pkUserID]), @p0)

The following methods are not supported by Linq2SQL:

• Math.DivRem(Int32, Int32, Int32)
• Math.DivRem(Int64, Int64, Int64)
• Math.IEEERemainder(Double, Double)

Math.Round() always rounds away from zero in Linq2Sql. In .Net it uses Banker’s rounding.