InvalidCastExeption when trying to dim a string - sql

Question

Im having a problem when trying to run my code. Im new to stackoverflow but will try to explain my problem.
Well, i get a "InvalidCastExeption" with the explanation
"Converson from string "Filename" to type "Integer" is not valid.
The confusing part is that FileName is a nvarchar(30) in my SQL database, and sName a string.
Look at the code, it failes at the dim sName = ...
Ps - I have tried to convert.toint / Cint, but it doesnt help. AND i want it as a string, not a integer!
Imports System
Imports System.Data
Imports System.Data.SqlClient
Public Class SelectrecipieDatabaseManager
Private Const CONNECTION_STRING As String = "Data Source=RYOW701;Initial Catalog=RyReci;Integrated Security=True"
Private connection As SqlConnection = Nothing
Private command As SqlCommand = Nothing
Public Sub RecipieHandler(ByVal Choice As String)
Dim reader As SqlDataReader
connection = New SqlConnection(CONNECTION_STRING)
Try
connection.Open()
Dim Query As String
Query = "select * from TbNew"
command = New SqlCommand(Query, connection)
reader = command.ExecuteReader
While reader.Read
Dim sName = reader.GetString("FileName")
RecipieForm.ComboBoxRec.Items.Add(sName)
End While
Catch ex As SqlException
MessageBox.Show(ex.Message)
Finally
connection.Close()
connection.Dispose()
End Try
End Sub
End Class

Answer 1

The getString method expects an ordinal number as it's parameter, not a string. Do this instead:
reader = command.ExecuteReader
Dim columnID As Integer = reader.GetOrdinal("FileName")
While reader.Read
Dim sName = reader.GetString(columnID)
RecipieForm.ComboBoxRec.Items.Add(sName)
End While