Set focus to the next picture box when page down or page up is clicked

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In win forms i am creating picture boxes dynamically for each of the image in a specific folder as thumbnails, when the user clicks page down the next picture box should get selected and i need to see the image highlighted please let know how it can be accomplished

What I have tried:

next to thumbnails displayed, i have a control to show the enlarged picture of the selected thumbnail, in the preview it is displaying the correct image but thumbnails are not to the next image

Posted 23-May-20 1:05am

Member 4535325

Updated 23-May-20 1:11am

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phil.o · Answer 1 · 2020-05-23T01:12:00

You could have all your picture boxes in a list, as well as a class-level integer variable holding current picturebox index. On click of the button, just increment or decrement the index, and set focus on corresponding picturebox.

VB.NET

Dim list As New List(Of PictureBox)
Dim currentIndex As Integer = 0

'' Populate the list when you create the pictureboxes

Private Sub NextButton_Click(sender As Object, e As EventArgs) Handles NextButton.Click
   currentIndex = (currentIndex + 1) Mod list.Count
   list(currentIndex).Focus()
End Sub

Private Sub PreviousButton_Click(sender As Object, e As EventArgs) Handles PreviousButton.Click
   currentIndex = (currentIndex - 1) Mod list.Count
   list(currentIndex).Focus()
End Sub