Can't Connect To DB When SqlServer Exp Has Been Idle For A Couple Hours.
Mar 13, 2008
Does SQLServer go to sleep when it's been idle? How can I connect without an error?
I have SQLExpress on a server. Server Name is SqlExpress. I have 2 DBs on that server... Tuna & Guppy. I'm connecting to the DBs from a remote PC which runs my App... an exe created with Visual Studio 2008, Visual Basic.
If I run my App at say 9:30PM, after the server has been idle for several hours, I get a "Can't open connection to Guppy" error, which is my error message when the connection attempt fails. If I quit & relaunch the app, it connects fine, and will continue connecting fine unless you leave the server idle for serveral hours again.
If I'm developing a 2nd app all evening... which connects to a 2nd DB...Tuna, that activity seems to keep the SqlServer awake and then launching the 1st app at 9:30PM connects to Guppy just fine.
I tried adding a "Connection Timeout=30" to my connection string but that did not help.
My connection code is as follows (note the server's name is SQLExpress):
Dim strConnG As String = "Data Source=SQLEXPRESSSQLEXPRESS;Initial Catalog=Guppy;Integrated Security=True;Connection Timeout=30"
Using ConnG As New SqlConnection(strConnG)
'open Guppy connection
Try
ConnG.Open()
Catch ex As Exception
MsgBox("Can't open connection to guppy")
Return False
End Try
'Code that does stuff
End using
Can anyone tell me how to fix this so I can connect without error, even if the server has been idle?
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error :
specified sqlserver not found connection connect()
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Here is the code (it does not contain the validation in this snippet):
Imports System.Data.SqlClient Imports SQLDMO
Public Class ADO_2 Inherits System.Web.UI.Page Protected WithEvents txtQuery As System.Web.UI.WebControls.TextBox Protected WithEvents txtresults As System.Web.UI.WebControls.TextBox Protected WithEvents lstDB As System.Web.UI.WebControls.DropDownList Protected WithEvents lblResult As System.Web.UI.WebControls.Label Protected WithEvents cmdExecute As System.Web.UI.WebControls.Button Protected WithEvents cmdNext As System.Web.UI.WebControls.Button
Private m_objConn As New SqlConnection() Private m_objSQLServer As SQLDMO.SQLServer
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
EnumerateDatabases()
'TEMP lstDB.Items.Add("Northwind") lstDB.Items.Add("Pubs") 'END TEMP End Sub
Private Sub Page_Unload(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Unload
m_objConn.Close() 'Just in case..... End Sub
Private Sub cmdExecute_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdExecute.Click
Dim objCommand As SqlCommand Dim objDataReader As SqlDataReader Dim intField As Integer
objCommand = New SqlCommand(txtQuery.Text, m_objConn) objDataReader = objCommand.ExecuteReader
While objDataReader.Read txtresults.Text &= vbNewLine For intField = 0 To objDataReader.FieldCount - 1 txtresults.Text &= objDataReader(intField).ToString.PadRight(15) Next End While
m_objSQLServer = New SQLDMO.SQLServer() m_objSQLServer.Connect("radu")
'Iterate through all databases on the target server: For Each objSQLDatabase In m_objSQLServer.Databases lstDB.Items.Add(objSQLDatabase.Name) Next objSQLDatabase
EnumerateDatabasesExit: objSQLDatabase = Nothing m_objSQLServer.Close() m_objSQLServer = Nothing Exit Sub
EnumerateDatabasesError: lblResult.Text = Err.Number.ToString & ", " & Err.Description Resume EnumerateDatabasesExit End Sub End Class
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