SQL check result of the sql statement

Question

hello gurus, i have this sql statement:
select MyTableColumn_PDF_File
from Database.dbo.MyTableName
where coalesce( MyTableColumn_PDF_File,' ') is null;
so basically, it works fine on sql management studio.
But what if I used this command on vb.net, how do I check whether the column is null or not?
Any help is greatly appreciated.
Thanks. :)
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IT Stuff Quick Bytes

Answer 1

Dim con As New SqlClient.SqlConnection("connectionstring")
Dim DR As SqlClient.SqlDataReader = Nothing
Try
con.Open()
Dim cmd As New SqlClient.SqlCommand("select COUNT(*) AS TotalNull " & _
"from Database.dbo.MyTableName " & _
"where MyTableColumn_PDF_File is null", mSQLConnection)
DR = cmd.ExecuteReader()
If DR.Read Then
'' found rows
If CInt(DR.Item("TotalNull")) <> 0 Then
'' We have more than 1 row that is not null
End If
Else
'' not found nows
End If
Catch ex As Exception
''' oops
Finally
If Not IsNothing(DR) Then
If Not DR.IsClosed Then DR.Close()
DR = Nothing
End If
If Not IsNothing(con) Then
If con.State = ConnectionState.Open Then con.Close()
con = Nothing
End If
End Try
This is a more complete example