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
Solved

check for null datetime

Posted on 2009-05-15
5
1,808 Views
Last Modified: 2013-12-17
I have an input form that handles a null date of birth

datetime dt
customer.Dob = DateTime.TryParse(Dob.Text, out dt) ? dt : (DateTime?)null;

Now I want to do the same when populating the form

I load in customer class and populate webform ...

customerDOBtextbox.Text = ????????

How can I check for null date when loading the form?  If its null then just don't display anything in the dob textobx
0
Comment
Question by:mugsey
5 Comments
 
LVL 31

Expert Comment

by:Jamie McAllister MVP
ID: 24394284
if (customerDOBtextbox.Text.Length > 0)
{}
0
 
LVL 18

Expert Comment

by:carlnorrbom
ID: 24394635

Hi,

Try:

if (!String.IsNullOrEmpty(dt.ToString())) {
    customerDOBtextbox.Text = dt.ToShortDateString();
}

/Carl.
0
 
LVL 22

Accepted Solution

by:
pivar earned 500 total points
ID: 24394670
Hi,

Is this what you look for?

customerDOBtextbox.Text = (customer.Dob == null ? "" : customer.Dob.ToString());

/peter

0
 
LVL 26

Expert Comment

by:Shaun Kline
ID: 24394734
If you are loading the date from the nullable date time, you need to check the HasValue property. You can use: if (customer.Dob.HasValue) customerDOBtextbox.Text = customer.Dob.Value;

If you are loading the value from a database object, such as a typed data set and your data field is nullable, you can check the Is<fieldname>Null property of the data object.

If you are reading the value from a data reader, you need to check the reader.IsDBNull(reader.GetOrdinal("<fieldname>")) before trying to access the value.
0
 

Author Comment

by:mugsey
ID: 24395199
Thanks for your postings guys
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
edit .asp files 5 31
bound data table problem 2 33
ASP.Net MVC Login functions with my own Database and User Tables 2 27
asp Google Map 2 32
Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

829 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