Question

I’m trying to create an auction site using asp.net. My auction’s start date & time and end date & time are stored in my sql server 2008 r2 database as datetime types. I’m using vb.net. I’m trying to create a select statement in which I can query the date and time portion relative to the current date and time (so as to only display current ongoing auctions). I can successfully query the date portion using the Date.Now function, but the time is giving me a hassle. DateAndTime.Now doesn’t work. I’ve even tried to separate the time and date in the database, but I still can’t get an effective query.

Here are two examples of code which I’ve tried:

Dim Connection As SqlConnection = New SqlConnection(...)
    Dim Command As SqlCommand = New SqlCommand()
    Dim _Reader As SqlDataReader
    Command.Connection = Connection
    Command.CommandText = "Select ... from Auctions where Start_Date_Time > " & DateAndTime.Now & " And End_Date_Time > " & DateAndTime.Now

Whereby Start_Date_Time and End_Date_Time are of type DateTime.

And:

Dim Connection As SqlConnection = New SqlConnection(...)
    Dim Command As SqlCommand = New SqlCommand()
    Dim _Reader As SqlDataReader
    Command.Connection = Connection
    Command.CommandText = "Select ... from Auctions where Start_Date >= " & Date.Today & "Start_Time <= " & DateAndTime.Now.ToLongTimeString & " And End_Date >= " & Date.Today & " And End_Time <= " & DateAndTime.Now.ToLongTimeString

Whereby Start_Date and End_Date are of type Date, and Start_Time and End_Time are of type Time(7).

Any suggestions are appreciated,
Thanks in advance

Answer 1

Thanks for the suggestions guys. It was a simple error on my part. All I needed to do was put the DateAndTime.Now in inverted comma’s.

So this code works :

Dim Connection As SqlConnection = New SqlConnection(...)
Dim Command As SqlCommand = New SqlCommand()
Dim _Reader As SqlDataReader
Command.Connection = Connection
Command.CommandText = "Select ... from Auctions where Start_Date_Time <= '" & DateAndTime.Now & "' And End_Date_Time >= '" & DateAndTime.Now & "'"