Checking cookies

[Bob Ross]

I'm sure I know the answer to this already but....
Does anyone know a good way of checking if cookies are enabled on a browser?

I currently have

 
If Request.QueryString("Trying") = "" Then
         Session.Add("SessionCookie", "ON")
         Response.Redirect(Request.Path & "?Trying=ON", True)
Else
         If Session("SessionCookie") = "" Then
                  Cookieslabel.Visible = True
         End If
         Session.Add("SessionCookie", "")
End If

But was wondering if there was a better way to do it? Preferably without a postback.

[Frinavale]

I'm sure I know the answer to this already but....
Does anyone know a good way of checking if cookies are enabled on a browser?

I currently have

 
If Request.QueryString("Trying") = "" Then
         Session.Add("SessionCookie", "ON")
         Response.Redirect(Request.Path & "?Trying=ON", True)
Else
         If Session("SessionCookie") = "" Then
                  Cookieslabel.Visible = True
         End If
         Session.Add("SessionCookie", "")
End If

But was wondering if there was a better way to do it? Preferably without a postback.

I haven't yet found a solution that doesn't post back and I doubt that there is one. I think the only way to check if cookies are enable is to create one and then check if it is still there after posting back.

I've looked for countless hours for the same thing.
I too would love it if someone would share a solution that doesn't post back.

Just don't get your hopes up,

-Frinny

[kenobewan]

To avoid postback I believe that you could use client-side script. In the past I have checked cookies using JavaScript, but if you have to do it server-side I hope that this article may help:
Client Script in ASP.NET Web Pages
Remember that you can use not Page.IsPostBack to avoid postbacks server side...

[Frinavale]

To avoid postback I believe that you could use client-side script. In the past I have checked cookies using JavaScript, but if you have to do it server-side I hope that this article may help:
Client Script in ASP.NET Web Pages
Remember that you can use not Page.IsPostBack to avoid postbacks server side...

Right now I have a javaScript script that checks to see if Cookies and JavaScript are enabled.

The way I solved this was to have my .NET application register my javaScript code using the ClientScript class in my application's preLoad() function. This way the cookies&javascr ipt check is done before the page is ever loaded.

This script posts back with the true/false values indicating if javaScript and Cookies are enabled. Then my server side logic the displays the appropriate web user control based on these findings.

It was tricky and involved implementing the IPostBackDataHa ndler.

How were you able to do this without posting back to the server?

-Frinny

[Bob Ross]

Thanks for everyones help.
I managed to get it working without postback by using

var cookieEnabled=(navigator.cookieEnabled)? true : false
 
//if not IE4+ nor NS6+
if (typeof navigator.cookieEnabled=="undefined" && !cookieEnabled){ 
document.cookie="testcookie"
cookieEnabled=(document.cookie.indexOf("testcookie")!=-1)? true : false
}
 
//if (cookieEnabled) //if cookies are enabled on client's browser
//do whatever