How to display a login failure messagebox for App.Config connection string

Question

I use the following connection string and am able to log into SQL 2008 R2 Server.

My.Settings.Item(\"CustomerConnectionString\") = \"Data Source=FAROOK-PC\\SQLEX         


        

Answer 1

use Try Catch Block. If connection fails use yor message box in catch block.

Dim sqlCnn As New SqlConnection
Dim connString as string = "Your Connection String"
Try
   sqlCnn = New SqlConnection(connString)
   sqlCnn.open()
Catch ex As SqlException
   MsgBox("Login Failed")

End Try