I have webform FillData.aspx with two textboxes, a checkbox, and a Submit button. This is the basic functionality: when I click on the checkbox, it copies the data from one textbox to the other. When I click on Submit, I redirect to page Finish.aspx. Since FillData.aspx expires immediately, when I click the "Back" button in the browser in Finish.aspx, I get the "Webpage has expired" page, which is good.
The problem is that when I refresh the page, not only do I get the data that the user had typed in, it also executes the code in CheckBox1_CheckedChanged.
My question is: How can I clear the typed text after the user refreshes when he clicks on "Back"and sees "Webpage has expired" page?
Here's my code: All my code is server-side. I also tried overriding LoadViewState and SavedViewState, but it didn't work.
protected void Page_Load(object sender, EventArgs e)
Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.Subtract(new TimeSpan(1, 0, 0, 0));
Response.Expires = -10000;
Response.CacheControl = "no-cache";
protected void Button_complete_Click(object sender, EventArgs e)
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
// copy text from one textbox to the other.