Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Error while checking browser compatibility

Posted on 2013-06-27
2
Medium Priority
?
385 Views
Last Modified: 2013-06-30
Hello Experts,

Below is the code,


'''''chrome compatibility
    Protected Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit
        If (Request.ServerVariables("http_user_agent").IndexOf("Chrome", StringComparison.CurrentCultureIgnoreCase) <> -1) Then
            Page.ClientTarget = "uplevel"
        End If
        If (Request.ServerVariables("http_user_agent").IndexOf("Safari", StringComparison.CurrentCultureIgnoreCase) <> -1) Then
            Page.ClientTarget = "uplevel"
        End If
    End Sub

Open in new window


Sometimes we are getting below error,

Object reference not set to an instance of an object.

at line,

 If (Request.ServerVariables("http_user_agent").IndexOf("Chrome", StringComparison.CurrentCultureIgnoreCase) <> -1) Then

Open in new window


Can anyone help with this?

Thanks.
0
Comment
Question by:dotsandcoms
2 Comments
 
LVL 11

Assisted Solution

by:mcnute
mcnute earned 750 total points
ID: 39283610
This may be an answer to your problem, it is also chrome related as is yours:
http://forums.asp.net/t/1551330.aspx/1
0
 
LVL 83

Accepted Solution

by:
CodeCruiser earned 750 total points
ID: 39284104
You can add a check to ensure that string is not null.

Change this

 If (Request.ServerVariables("http_user_agent").IndexOf("Chrome", StringComparison.CurrentCultureIgnoreCase) <> -1) Then

to

If Not String.IsNullOrEmpty(Request.ServerVariables("http_user_agent")) Then
 If (Request.ServerVariables("http_user_agent").IndexOf("Chrome", StringComparison.CurrentCultureIgnoreCase) <> -1) Then
End If
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an anti-spam), the admin…
Please read the paragraph below before following the instructions in the video — there are important caveats in the paragraph that I did not mention in the video. If your PaperPort 12 or PaperPort 14 is failing to start, or crashing, or hanging, …
Suggested Courses

972 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question