loop through

Question

User-1941296693 posted

How do I loop through imagenames

So say I had 3 images

image1
image2
image3

How could I loop through these, using something like the code below

Dim iCounter As Integer
iCounter = 1

Do while iCounter<4

'get image1, image2 and image3 on the loop through using the iCounter value

iCounter +1

Loop

 

thanks.

 

Answer 1

User-1028151323 posted

Where do you have them? In a directory or in a database?

Answer 2

User-952121411 posted

Yep this is not too difficult to do.  Use generic collection of type 'Image' you can iterate through the Image objects easily, and not have to worry about Do Loops with counts, etc.  Take a look to the code below that does everything from creation to iterating through the collection:

        'Create (3) images from the System.Drawing.Image object
        Dim Image1 As Image = Nothing
        Dim Image2 As Image = Nothing
        Dim Image3 As Image = Nothing

        'Load the images from files on disk (or whatever method needed; just an example)
        Image1 = Image.FromFile("C:\MyImage1.jpg")
        Image2 = Image.FromFile("C:\MyImage2.jpg")
        Image3 = Image.FromFile("C:\MyImage3.jpg")

        'Create a generic collection of Image objects, and add the images created above
        Dim ImageList As New List(Of Image)
        ImageList.Add(Image1)
        ImageList.Add(Image2)
        ImageList.Add(Image3)

        '...Sometime later you want to iterate through the collection of Image objects
        For Each Img As Image In ImageList

            'Extract the image properties
            Dim h As Double = Img.Height
            Dim w As Double = Img.Width

        Next

If you are not familiar with working with object collections, take a look to the following for more help:

.NET Object Collections Using Generics 101: 

http://allen-conway-dotnet.blogspot.com/2009/11/net-object-collections-using-generics.html

Hope this helps!