MDAC 2.5 SDK - ADO

ConnectionString, ConnectionTimeout, and State Properties Example (VB)

See Also

This example demonstrates different ways of using the ConnectionString property to open a Connection object. It also uses the ConnectionTimeout property to set a connection timeout period, and the State property to check the state of the connections. The GetState function is required for this procedure to run.

Public Sub ConnectionStringX()

   Dim cnn1 As ADODB.Connection
   Dim cnn2 As ADODB.Connection
   Dim cnn3 As ADODB.Connection
   Dim cnn4 As ADODB.Connection

   ' Open a connection without using a Data Source Name (DSN).
   Set cnn1 = New ADODB.Connection
   cnn1.ConnectionString = "driver={SQL Server};" & _
      "server=srv;uid=sa;pwd=pwd;database=Pubs"
   cnn1.ConnectionTimeout = 30
   cnn1.Open
   
   ' Open a connection using a DSN and ODBC tags.
   Set cnn2 = New ADODB.Connection
   cnn2.ConnectionString = "DSN=Pubs;UID=sa;PWD=pwd;"
   cnn2.Open
   
   ' Open a connection using a DSN and OLE DB tags.
   Set cnn3 = New ADODB.Connection
   cnn3.ConnectionString = "Data Source=Pubs;User ID=sa;Password=pwd;"
   cnn3.Open
   
   ' Open a connection using a DSN and individual 
   ' arguments instead of a connection string.
   Set cnn4 = New ADODB.Connection
   cnn4.Open "Pubs", "sa", "pwd"
 
   ' Display the state of the connections.
   MsgBox "cnn1 state: " & GetState(cnn1.State) & vbCr & _
      "cnn2 state: " & GetState(cnn2.State) & vbCr & _
      "cnn3 state: " & GetState(cnn3.State) & vbCr & _
      "cnn4 state: " & GetState(cnn4.State)

   cnn4.Close
   cnn3.Close
   cnn2.Close
   cnn1.Close

End Sub

Public Function GetState(intState As Integer) As String

   Select Case intState
      Case adStateClosed
         GetState = "adStateClosed"
      Case adStateOpen
         GetState = "adStateOpen"
   End Select

End Function