Convert string to datetime error

Question

1.00/5 (1 vote)

See more:

Can anybody tell me what wrong with this code

C#

string s =@"";  //s = "-";
string r = HttpUtility.HtmlDecode(s);
string r3 = string.Format("1{0}Jan{0}2007",r);

string format = "d-MMM-yyyy";
DateTime MinedDateTime ; 
bool result = DateTime.TryParseExact(r3.Trim(), format, null, DateTimeStyles.None, out MinedDateTime);
Console.WriteLine(r3);

if(r3 == "1-Jan-2007")
{
	Console.WriteLine("Equal");
	Console.WriteLine("1-Jan-2007");
}
else
{
	Console.WriteLine("Not Equal");
	Console.WriteLine("1-Jan-2007");
}
Console.WriteLine(result);

the Output is
1-Jan-2007
Not Equal
1-Jan-2007
False

but when i replace
string.Format("1{0}Jan{0}2007",r);
with
string.Format("1{0}Jan{0}2007","-");
every thing works fine

the Output is
1-Jan-2007
Equal
1-Jan-2007
True

s= html code of '-'(hypen) is not showing

Posted 6-Feb-13 17:43pm

agha_ali22

Updated 6-Feb-13 17:50pm

v2

Add a Solution

1 solution

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)

Sergey Alexandrovich Kryukov · Accepted Answer · 2013-02-06T18:07:00

You are doing one of the worse of the very usual mistakes of beginners this days: trying to work with string representation of data instead of data.

Isn't this obvious: two points of times showing identical time or identical data are still identical, even if they are shown in different string representations, due to d

C#

ifferent formats/cultures? Compare time, not strings:
System.DateTime thisInstance = System.DateTime.Now;
System.DateTime someOtherTime = // .. something else
if (thisInstance == someOtherTime) // ... you can use equivalence operator
// or
if (thisInstance >= someOtherTime) // ... and so on

Why, why comparing strings representing time or date, ever?

You need those strings, for example, when you need to show them on screen.

First, learn about all System.DateTime.ToString methods: http://msdn.microsoft.com/en-us/library/system.datetime.aspx[^].

Second, learn formatting:
http://msdn.microsoft.com/en-us/library/zdtaw1bw.aspx[^],
http://msdn.microsoft.com/en-us/library/az4se3k1.aspx[^],
http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx[^].

That's all.

—SA