Checking for an SQL result in VB.NET

Question

I need to check if my SQL statement returned any results from the Access db I\'m using to store my data.

I have this code atm:

        cn = New OleDbConn         


        

Answer 1

Simple. Use the OleDbDataReader.HasRows Property after your call to ExecuteReader.

    cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=D:\Computing Project\database.mdb;")
    cn.Open()
    cmd = New OleDbCommand("SELECT * FROM(" & roomvar.ToLower() & ") WHERE (((" & roomvar.ToLower() & ".date)=" & Chr(34) & dtpDate.Value.Date & Chr(34) & "))", cn)
    dr = cmd.ExecuteReader

    hasRows = dr.HasRows

    dr.Close()