Question: I have upload control on my asp.net page. I upload pictures in folder cars and they show in windows explorer when I open that folder (cars), but in Visual Sudio they act like they not include in project ( that is the reason why they don't show on image control which point to some of them. What did I make wrong ?

Answer: 
Uploading the images in the web application will never make any changes to your project. You will have to add them manually if you'll need them there. But generally these are pictures added by your user so the would just be in the file system - not really part of the solution, are they?
You have to click the refresh button at the top of the solution explorer in Visual Studio for it to show changes to the files.