very simple question about using a resource

hi guys, I am sure that it is very easy but I could not manage it. my aim is to choose some items from a listbox and a picturebox will display the photo in resources with the same name of the item in list box. here is the code I wrote but I cannot make it work. anyone has an idea?

PictureBox1.Image = My.Resources.Resource1.ListBox1.SelectedItem

it gives a mistake telling that listbox1 is not a member of Resource1. I know this; but the result of Listbox1.selected item is a member of resource1...

My.Resources.Resource1 is presumably an Image. It doesn't have a member named ListBox1. ListBox1 is a member of the form. If you want to use strings to get resources then you must use a ResourceManager, which you get from My.Resources. You use it to get an object by name, then cast it as the appropriate type:

vb.net Code:

PictureBox1.Image = DirectCast(My.Resources.ResourceManager.GetObject(CStr(Me.ListBox1.SelectedItem)), Image)

Thank you very much; it works now. But could you please tell me why you use "me" inside the code? What does it mean?

'Me' always refers to the current instance. It's not required but I like to be explicit.

thank you very much for your great help! it is very clear now...

I thought that it worked but now I see that it is not. Now the code is not giving an error but picture1 is not showing the picture either... what could it be the reason?

sorry... but my crystal ball is busted (it was one heck of a weekend)... do you mind posting your code as you currently have it?

Thaaaaaanks.
-tg

ah sure, please see it below. my listbox gets its content from a database table. My aim is when in the list box I choose "SMCOP 2120 BAL", picturebox1 should show the file with name "SMCOP 2120 BAL.jpg" that is available in my resources.

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load


Dim dtMontaj_Tipi As New AmetailorDataSet.Montaj_TipiDataTable
Dim adapterMontaj_Tipi As New AmetailorDataSetTableAdapters.Montaj_TipiTableAdapter
adapterMontaj_Tipi.Fill(dtMontaj_Tipi)


ComboBox1.DataSource = dtMontaj_Tipi
ComboBox1.DisplayMember = "Montaj Tipi"


Dim dtBoy As New AmetailorDataSet.BoyDataTable
Dim adapterBoy As New AmetailorDataSetTableAdapters.BoyTableAdapter
adapterBoy.Fill(dtBoy)


ComboBox2.DataSource = dtBoy
ComboBox2.DisplayMember = "Boy"

End Sub

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
FindCombinations()
End Sub

Private Sub ComboBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox2.SelectedIndexChanged
FindCombinations()
End Sub

Sub FindCombinations()
Try
ListBox1.Items.Clear()

Dim selectedMontaj_Tipi As DataRowView = (ComboBox1.SelectedItem)
Dim selectedBoy As DataRowView = (ComboBox2.SelectedItem)

Dim ad As New AmetailorDataSetTableAdapters.Kabin_ButonyerleriTableAdapter
Dim dtCombination As New AmetailorDataSet.Kabin_ButonyerleriDataTable
ad.Fill(dtCombination)

For Each dr As AmetailorDataSet.Kabin_ButonyerleriRow In dtCombination
If dr.Boy = selectedBoy("Boy") And dr.Montaj_Tipi = selectedMontaj_Tipi("Montaj Tipi") Then
ListBox1.Items.Add(dr.Model)
End If
Next
Catch ex As Exception

End Try


End Sub

Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
PictureBox1.Image = My.Resources.ResourceManager.GetObject(CStr(ListBox1.SelectedItem))
End Sub
End Class

is there a problem with the code or do you need any further information so that you can give me a hand? :)

The problem I see is that you did not use all of the code given :).

Code:

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PictureBox1.Image = My.Resources.ResourceManager.GetObject(CStr(ListBox1.SelectedItem))

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Should be@

Code:

---

PictureBox1.Image = DirectCast(My.Resources.ResourceManager.GetObject(CStr(Me.ListBox1.SelectedItem)), Image)

---

You are missing the directcast into an image. You should not be able to compile your application and it should tell you why if you have Option Explicit/Option Strict turned on, which no sane code should ever turned off for a project. If you do not have these turned on or have no idea what I am talking about just search for Option Explicit on the forums.

I made your correction but it still do not display the picture. It does not give an error either. Any comments?

nobody does not have any idea?

you must type the exact file name, its case sensetive