Combobox issues

Hi, I am making a project to see al my dvd's plus their information in a windows form with ado.net.

Now I've made a form that has the design like the picture "design.jpg". On this picture you can also see the datasources and tables I use.

The structure of my dataset is like on this picture: "dataset.jpg"

This is my code:

code Code:

Public Class frmDVDcollectie
 
    Private Sub frmDVDcollectie_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'DtsMuziekcollectie.tblCategorieen' table. You can move, or remove it, as needed.
        Me.objTblCategorieenTableAdapter.Fill(Me.objDtsMuziekcollectie.tblCategorieen)
        'TODO: This line of code loads data into the 'DtsMuziekcollectie.tblDVDInhoud' table. You can move, or remove it, as needed.
        Me.objTblDVDInhoudTableAdapter.Fill(Me.objDtsMuziekcollectie.tblDVDInhoud)
 
        Vullen()
 
    End Sub
 
    Private Sub Vullen()
        Dim dtvDVDInhoud As DataView
 
        dtvDVDInhoud = objDtsMuziekcollectie.tblDVDInhoud.DefaultView
        dtvDVDInhoud.RowFilter = "CategorieID = " & cboCategorie.SelectedValue.ToString
        dtvDVDInhoud.Sort = "DvdID ASC"
 
        objTblDVDInhoudBindingSource.DataSource = dtvDVDInhoud
        Me.objTblDVDInhoudBindingSource.MoveFirst()
 
 
    End Sub
 
    Private Sub cboCategorie_SelectedIndexChanged_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboCategorie.SelectedIndexChanged
        If Not cboCategorie.SelectedValue Is Nothing Then
            Vullen()
        End If
    End Sub
 
    Private Sub btnVorige_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnVorige.Click
        Me.objTblDVDInhoudBindingSource.MovePrevious()
    End Sub
 
    Private Sub btnVolgende_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnVolgende.Click
        Me.objTblDVDInhoudBindingSource.MoveNext()
    End Sub
 
    Private Sub btnEerste_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEerste.Click
        Me.objTblDVDInhoudBindingSource.MoveFirst()
    End Sub
 
    Private Sub btnLaatste_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLaatste.Click
        Me.objTblDVDInhoudBindingSource.MoveLast()
    End Sub
 
End Class

The problem I have is that when I compile the project that I can perfectly change the categoriebut when I have changed the categorie, the I've selected is there twice and the categorie that is one step above the one I've selected is gone. How can I make sure that all my categories keep standing their on there place?

Greetings
Hash

kevin you are in a wrong section. :cry:
All .net related goes to vb.net section. :afrog:

could you again state what your problem is...
You are getting the combo populated twice?

Well, When I start my program all my information goes in the right text boxes, but when I select another category in my combo box, it goes like on the picture. On this picture I have selected Horror and normally there are 5 categories in this order: Action, Comedy, Science-fiction, horror, fantasy

Now it stands in this order: horror, comedy, science-fiction, horror, fantasy

What is the problem?

I belive the click event is calling the sub which is populating the combo.
Try not to populate the combo on click event.
Note I don't have .NET version of vb so you might have to try yourself

what's the name of the combo used for category.
what's code for populating the category combo.

Categorie combo Code:

Private Sub cboCategorie_SelectedIndexChanged_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboCategorie.SelectedIndexChanged
        If Not cboCategorie.SelectedValue Is Nothing Then
             Dim dtvDVDInhoud As DataView
 
             dtvDVDInhoud = objDtsMuziekcollectie.tblDVDInhoud.DefaultView
             dtvDVDInhoud.RowFilter = "CategorieID = " & cboCategorie.SelectedValue.ToString
             dtvDVDInhoud.Sort = "DvdID ASC"
 
             objTblDVDInhoudBindingSource.DataSource = dtvDVDInhoud
             Me.objTblDVDInhoudBindingSource.MoveFirst()
        End If
End Sub

This is the code that selects all the data of the category I have selected.

This is the code that fills the category combo box

Fill Code:

'TODO: This line of code loads data into the 'DtsMuziekcollectie.tblCategorieen' table. You can move, or remove it, as needed.
        Me.objTblCategorieenTableAdapter.Fill(Me.objDtsMuziekcollectie.tblCategorieen)

The dataset, datasource and datatable are all added in the design form. As you can see on the picture at the bottom. It's design.jpg that you can find in the first post