Stop after refresh post-back in asp.net webpage

Question

I am working on asp.net project. I have a search textbox in it. when I search first time it work properly. Then after refresh the page textbox value is not clearing.

 protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { txtEmployeeID.Text = string.Empty; } txtEmployeeID.Focus(); } 

Answer 1

If you are just refreshing by pressing F5 or Ctrl + R then it is considered as just a page refresh. There is a difference in refresh and a postback.

Please refer the below article http://www.codeproject.com/Articles/68371/Detecting-Refresh-or-Postback-in-ASP-NET

Answer 2

try this code in your mark up set autopostback in your textbox as true

protected void Page_Load(object sender, EventArgs e)
 {
     if(Page.IsPostBack)
          {                
            txtEmployeeID.Text = string.Empty;
        }
        txtEmployeeID.Focus();  

 }

just remove "!" in your if statement, or remove the if statement.