Sep 04, 2018 01:04 AM|Ackerly Xu|LINK
In the page onload, if IsPostback = True then lblValidate.Text = ""
Hi sevi ,
Because you write this code, it will clear the content of your label every time the page posts back ,which is why you see the result.
I suggest you could remove this line of code or write if !IsPostback then lblValidate.Text = "".