VB.NET SQL Server Insert - ExecuteNonQuery: Connection property has not been initialized

Question

In the form load event, I connect to the SQL Server database:

Private Sub AddBook_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles My         


        

Answer 1

Please try to wrap the use of your connections (including just opening) inside a USING block. Assuming the use of web.config for connection strings:

    Dim connection As New SqlConnection(ConfigurationManager.ConnectionStrings("web.config_connectionstring").ConnectionString)
    Dim query As New String = "select * from Table1"
    Dim command as New SqlCommand(query, connection)

Using connection
   connection.Open()
   command.ExecuteNonQuery()
End Using

And PARAMETERIZE anything user-entered.. please!