System.datetime to string error

Question

0.00/5 (No votes)

See more:

Dear all,

I am trying to parse my UploadDate as (dd/mm/yyyy) format on the client-side but currently its displaying date with time as well. I keep experiencing -- 'System.DateTime?' and 'string') --> error
with the following query below:

C#

public ActionResult Date(DateTime? start, DateTime? end)
        {
            DateTime yesterday = DateTime.Today.AddBusinessDays(-1);

            var query = from s in db.data_qy
                        select (s);

            var st = String.Format("{0:dd/MM/yyyy}", start);
            var en = String.Format("{0:dd/MM/yyyy}", end);

           // var db_start = DateTime.Parse(start).ToString("MM/dd/yyyy");

            //var datet1 = DateTime.ParseExact(start, "MM/dd/yyyy", CultureInfo.InvariantCulture);

            if (String.IsNullOrEmpty(st) && String.IsNullOrEmpty(en))
            {
                query = query.Where(c => c.UploadDate == yesterday);
            }
            else
            {
                if (!String.IsNullOrEmpty(st))
                {
                    query = query.Where(c => c.UploadDate >= st);// error line
                }

                if (!String.IsNullOrEmpty(en))
                {
                    query = query.Where(c => c.UploadDate <= en); // error line
                }
            }

            return View(query);
        }

I tried adding (? null) statement, but I am little unclear where I would add this.

Please note: That my 'UploadDate' fieldname is nullable datetime from my entity data model (database_qy).

Please advice, if possible. Thank you for your time and help.

Posted 14-May-14 3:36am

miss786

Add a Solution

2 solutions

Solution 1

C#

DateTime date1 = new DateTime(2008, 6, 1, 7, 47, 0);
Console.WriteLine(date1.ToString());

// Get date-only portion of date, without its time.
DateTime dateOnly = date1.Date;
// Display date using short date string.
Console.WriteLine(dateOnly.ToString("d"));
// Display date using 24-hour clock.
Console.WriteLine(dateOnly.ToString("g"));
Console.WriteLine(dateOnly.ToString("MM/dd/yyyy HH:mm"));   
// The example displays the following output to the console: 
//       6/1/2008 7:47:00 AM 
//       6/1/2008 
//       6/1/2008 12:00 AM 
//       06/01/2008 00:00

The above code from here[^]

Posted 14-May-14 4:16am

Vi(ky

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

johannesnestler · Accepted Answer · 2014-05-14T04:20:00

Yes you can't compare strings with DateTime objects (assuming UploadData is a DateTime), -> type confusion? maybe bettern not to overuse var keyword? At least I don't see you parsing that UploadData field. just the DateTimep parameters (without checking them for null).

So just add proper null checks for your nullable DateTimes,
and compare DateTime with DateTime (or strings with strings - but I see no need for that in your case)