Question

I am trying to replace random number with pictures. for example If random number is 1 show picture black.jpg:

Cache[diceKey] = r.Next(1, 5);  // random (1-4)

if (r.Next(1, 2) == 1 )
    image.BackImageUrl = "Images/black.png";

is there any solutions that I can show my picture if random number is 1?

Answer 1

As I already said in my comment r.Next(1, 2) will always return 1, so you will always show that black image…

I think you should change your code to this:

var randomValue = r.Next(1, 5);  // random (1-4)
Cache[diceKey] = randomValue;

if (randomValue == 1)
    image.BackImageUrl = "Images/black.png";
else
    image.BackImageUrl = "";