how to increase value of like when click button like runtime

Hi I create web page have input type text and button add

when write value of course name in text box and press click add button it added in table as following

course    like   dislike

 

 c#             0          0        like  dislike

 

What i need actually is when press click on like button increase value of 0 for like  depend on how many time click i will press on button like

suppose i click like button 5 times click

it will start 1,2,until it reach to 5

 

c#    5    0    like dislike (press button like 5 times click) 

 

my code as bellow