'Executereader requires an open and available connection. The connection's current state is closed.'

Question

1.00/5 (1 vote)

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            connection_open()
            cmd = New SqlCommand(qry, cnn)
            dr = cmd.ExecuteReader

            If dr.Read = True Then
                MsgBox("Login Successfully", MsgBoxStyle.Information, "Login Success")
                Me.Hide()
                connection_close()
            Else
                MsgBox("Invalid User_Name/Password", MsgBoxStyle.Critical, "Login Failure")
                connection_close()

            End If




        End If
    End Sub
End Class

What I have tried:

ExecuteReader requires an open and available Connection. The connection's current state is closed.'

Posted 7-Jun-20 4:11am

Member 14856045

Updated 7-Jun-20 4:35am

PIEBALDconsult

v2

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F-ES Sitecore 7-Jun-20 10:28am

The error is self-explanatory. Rather than using global\shared connections, when you need a connection create it there and then using new SqlConnection. As it is the problem is probably a combination of your connection_open function and your "cnn" variable.

PIEBALDconsult 7-Jun-20 10:30am

We have no idea what connection_open() does, and maybe you don't either.
Try cmd.Connection.open()

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OriginalGriff · Answer 1 · 2020-06-07T04:36:00

We can't see your connection_open method, but it's not opening the connection you are using, and you shouldn't do it like that anyway. Create your connection inside a Using block, open it, and let the system Close and Dispose it when it goes out of scope. "Sharing" a connection is generally a bad idea and leads to problems later.

VB

Using con As New SqlConnection(strConnect)
	con.Open()
	Using cmd As New SqlCommand("SELECT iD, description FROM myTable", con)
		Using reader As SqlDataReader = cmd.ExecuteReader()
			While reader.Read()
				Dim id__1 As Integer = CInt(reader("iD"))
				Dim desc As String = DirectCast(reader("description"), String)
				Console.WriteLine("ID: {0}" & vbLf & "    {1}", iD, desc)
			End While
		End Using
	End Using
End Using