Entity Framework 6 ToString(), formatting (DateTime format), query intercept

Question

I`m not found correct way to search with linq2sql in DateTime (DateTime?) fields.

db.Items.Where(x => x.DateTime1.ToSt         


        

Answer 1

1. Function in MS SQL

CREATE FUNCTION [dbo].[ToString](@P sql_variant)
RETURNS NVARCHAR(20)
AS
BEGIN
    IF (sql_variant_property(@P, 'BaseType') = 'datetime')
        RETURN CONVERT(NVARCHAR(10), @P, 102) + ' ' + CONVERT(NVARCHAR(8), @P, 108);

RETURN CAST(@P as NVARCHAR(max));
END

1. Create sql execution Interceptor

public class DbCommandInterceptor  : IDbCommandInterceptor 
{
    public void ReaderExecuting(DbCommand command, DbCommandInterceptionContext interceptionContext)
    {
        if (command.CommandText.IndexOf("CAST") != -1)
        {
            command.CommandText = command.CommandText.Replace("CAST(", "dbo.ToString(");
            command.CommandText = command.CommandText.Replace("] AS nvarchar(max))", "])");

        }
    }

}

1. Add Interceptor to DbContext

public class DB : DbContext
{
    public DB(): base(@"Data Source=localhost\SQLEXPRESS;Initial Catalog=EFTest")
    {
        DbInterception.Add(new DbCommandInterceptor ());
    }
}