CODEWITHSUNDEEP
c#asp.netbuttonclick
Matthew
Matthew

Reputation: 4607

Keeping track of number of button clicks

Let us assume that I have a page with a CAPTCHA image.

I want to let the user try to enter the code for three times, otherwise he is not allowed to do it anymore.

How can I keep track of the number of times the "Confirm" button has been clicked. The "Confirm" button has to perform a postback to the server every time it is clicked.

Using JavaScript is not good since if the user reloads the page, the counter would be set to zero. How can this be done please?

Upvotes: 2

Views: 4264

Answers (2)

ispiro
ispiro

Reputation: 27673

Use ViewState to store the number.

Or better yet - Session.

The advantage of Session is that it is stored on the Server (AFAIK) so it can't be tampered with, and also that it will persist even when reloading the page.

Upvotes: 4

Mike Perrenoud
Mike Perrenoud

Reputation: 67898

This should be pretty straight forward. First set the counter to zero, and then update it on subsequent post backs:

if (!this.IsPostBack) { Session["RetryCount"] = 1; }
else
{
    int retryCount = (int)Session["RetryCount"];
    if (retryCount == 3) { // do something because it's bad }
    else { retryCount++; Session["RetryCount"] = retryCount; }
}

Upvotes: 5

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