access selected item in list view

See more:

C#

WinForms

VS2012

hello,
First i'm sorry for my weak english.
I need to have an image view(telerik rad list view) and an image list,when user clicks on images of image list,the selected image appears in the picture box.
but i can't access selected item's key to show it from list box.
i have no idea how to access image key
I tried following links :
http://www.telerik.com/help/aspnet-ajax/listview-selecting-items.html[^]
http://www.telerik.com/community/forums/aspnet-ajax/listview/get-selected-value-of-radlistview.aspx[^]
http://www.telerik.com/community/forums/aspnet-ajax/listview/how-get-selecteditem-fileds-such-as-key-id-name-in-itemcommand-event.aspx[^]

but i couldn't find any way to access them.

this is my code to load image in image list and from image list to image view :

 private void radButtonElement1_Click(object sender, EventArgs e)
        {
 string[] imgs;
            openFileDialog1.ShowDialog();
            imgs = openFileDialog1.FileNames;
            int i = 0;
            foreach (string im in imgs)
            {
            Bitmap bmp = new Bitmap(im);
            imageList1.Images.Add(bmp);
            ListViewDataItem item = new ListViewDataItem();
            item.Image = imageList1.Images[i];
            this.radListView1.Items.Add(item);
            i++;
            }
            radListView1.ItemSize = new Size(100, 100);
            radListView1.AllowArbitraryItemHeight = false;
            radListView1.AllowArbitraryItemWidth = false;
}

thank you.