Solved

Anyway to check if an 'id" is a GUID?

Posted on 2009-05-15
4
867 Views
Last Modified: 2012-05-07
Anyway to check and see if this "id" actually contains a GUID. Sometimes the ID holds ";nbsp" and code fails.

 if (e.Item is GridEditableItem)
            {
                GridEditableItem editedItem = e.Item as GridEditableItem;

                string id = editedItem["Id"].Text;
             
                Basket basket = Basket.Items.FindById(new Guid(id)); //**fails here if ID is not GUID
0
Comment
Question by:Camillia
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 7

Expert Comment

by:svelluto
ID: 24397016
Why don't you check the length of the 'id' string after you set it.

View Code Sample.

You could even check if the id string is the same length as the GUID.

Or if you would like to use REGEX to test for a GUID,
here is a good example:

http://geekswithblogs.net/jawad/archive/2005/05/20/GuidVerifier.aspx



if (id.length > 6) //  - 6 Characters
{
 
Basket basket = Basket.Items.FindById(new Guid(id));
 
}
 
//Another Example
 
if (id.length == guid.length) //guid.length could be a number
{
 
Basket basket = Basket.Items.FindById(new Guid(id));
 
}

Open in new window

0
 
LVL 7

Author Comment

by:Camillia
ID: 24397200
let me try.
0
 
LVL 7

Accepted Solution

by:
ajolly earned 500 total points
ID: 24398143
Try this
public static bool isValidGuid(String guid)
{
    bool isValid = false;
    Regex re = new Regex(@"^(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}$", RegexOptions.IgnoreCase);
    if (re.IsMatch(guid))
    {
        isValid = true;
    }
    return isValid;
}

Open in new window

0
 
LVL 7

Author Comment

by:Camillia
ID: 24398602
I did id.Length == 36 but i think ajolly's method might be better. Let me try.
0

Featured Post

[Webinar] How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

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

A quick way to get a menu to work on our website, is using the Menu control and assign it to a web.sitemap using SiteMapDataSource. Example of web.sitemap file: (CODE) Sample code to add to the page menu: (CODE) Running the application, we wi…
Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…

717 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