Visual Studio 2012 OLEDB connection - visual-studio-2012

Question

I have this code that I am using in visual studio 2012 to populate a combobox from data in a sql database. Every time I try to debug it I get the exception at the for loop of a null reference exception. I am hoping someone can help me figure out what it is I am missing here.
Private Sub StationList_Click(sender As Object, e As EventArgs) Handles StationList.Click
Dim cn As New OleDbConnection
cn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\hendera2\Desktop\StationEquip.accdb"
Dim Mystr As String = "SELECT DISTINCT Location FROM StationEquipment"
Dim Myadapter As OleDbDataAdapter
Dim Mydataset As New DataSet()
Try
cn.Open()
Myadapter = New OleDbDataAdapter(Mystr, cn.ConnectionString)
Myadapter.Fill(Mydataset, Mystr)
Dim dr As DataRow
For Each dr In Mydataset.Tables("StationEquipDataSet").Rows
Me.StationList.Items.Add(dr("Location"))
Next
cn.Close()
Catch ex As Exception
MsgBox("Cannot Open connection")
End Try
End Sub

Answer 1

Change the "StationEquipDataSet" data table name to "StationEquipment"
You're mismatching the table name, this is causing the null reference when you're trying to access the rows of this table, because it doesnt exists

Answer 2

Obviously I can't see your database, or the records it's pulling, but I would try adding this to elemenate the possibility of trying to reference a null value:
If Mydataset.Tables("StationEquipDataSet").Rows.Count > 0 Then
For Each dr In Mydataset.Tables("StationEquipDataSet").Rows
Me.StationList.Items.Add(dr("Location"))
Next
End If

Answer 3

I believe you got the name wrong in the Mydataset.Tables("StationEquipDataSet") expression.
To find out whether the dataset really does contain your table, and to find out what would be the correct name to use as index, you could try to insert these lines just before the loop:
Console.WriteLine(MyDataSet.Tables.Count);
for (var i = 0; i > MyDataSet.Tables.Count;i++)
{
Console.WriteLine(MyDataSet.Tables[0].TableName);
}
This would for instance write the amount of tables and the table names to the console.