Button click event doesn't work properly

Question

This following code handle button click event. When the user click first time it sets the lable as \"First Time\", and when the user click second time it sets the lable as \

Answer 1

You only need to change the way you increase the counter in the method. You are not saving it back as a new variable after the button click.

int counter = 0;     
protected void btnCompTagUpdate_Click(object sender, EventArgs e) {     
if (counter == 0)     { 
counter = counter + 1;        
label1.Text="First Time";             
}    
 else if (counter == 1) {         
counter = counter - 1;        
label1.Text="Second Time";   
 }     
 }