I declared an array and assigned a values to it dynamically. When I pressed on my SAVE button, the content of the array disappear or it doesn’t have any value at all whereas if I’m going to press the SEARCH button (e.g. this button assigned values to my array dynamically) it displays the content of my array. The SEARCH button will be pressed first because I have to search for a specific member, in this action, I have to assigned values to my array and fortunately it displays its content. After I inputted the necessary details and press the SAVE button, my array doesn’t have any value at all. 
That is how the stateless nature of http works…
So, I have to make use of session?
Thanks pufa, because of your response I just make use of list string and place my statements inside my second button.
You can keep the array… you just need to “load” the array on each button postback.