comparing hours in ASP.NET using C#

Question

3.00/5 (4 votes)

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Dear All,

I am trying to compare two date hours as below:

DateTime Login =Convert.ToDateTime(ds.Tables[1].Rows[0]["Login"]);
      DateTime Logout = Convert.ToDateTime(ds.Tables[1].Rows[0]["LogOut"]);
      int var = DateTime.Compare(Login,Logout);
      if (var > 3 )
      {
       lblCount.Text = "0";
      }

Here, I am actually checking if the difference between login and Logout is more than 3 hours then :

lblCount.Text = "0";

I don't think its correct. Can any one please suggest me how to compare the dates for 3 hours?

Posted 14-Jun-11 19:03pm

Raj.rcr

Updated 14-Jun-11 19:09pm

v3

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Comments

Raj.rcr 15-Jun-11 1:25am

Login and Logout times are actually getting today's date and time when the user logs in or off.. How to use Hour property for these two?

Prerak Patel 15-Jun-11 1:57am

Did you try - int var = Logout.Subtract(Login).Hours;
You can post a comment what you get when you tried the solution.
Posting a comment to your own question won't help. No one would know that you made a comment here.

Raj.rcr 15-Jun-11 2:00am

yeah.. I have tried as below:
int var = Logout.Subtract(Login).Hours;
if (var > 3 )
{
lblCount.Text = "0";
}

But the problem is: Even if the condition fails, its still making lblCount as "0".

Prerak Patel 15-Jun-11 2:48am

Try putting else part as well.
if (var > 3 )
{
lblCount.Text = "0";
}
else
{
lblCount.Text = "";
}

parmar_punit 15-Jun-11 4:29am

for that see my solution it will more helpful to you

7 solutions

Solution 7

here the solution which u want...the string value which I taken that value like you taken from the datatable.....

string INDate = "2011-02-02 4:45:25";
string OutDate = "2011-02-02 12:33:33";
DateTime startDate = Convert.ToDateTime(INDate);
DateTime endDate = Convert.ToDateTime(OutDate);
TimeSpan diff = endDate.Subtract(startDate);
string FV = diff.TotalHours.ToString();

Best of Luck.....

Posted 14-Jun-11 20:41pm

kaushal16

Updated 15-Jun-11 3:15am

v2

Solution 6

It will help you......

DateTime Login = Convert.ToDateTime(ds.Tables[1].Rows[0]["Login"]);
Login.AddHours(3); // add 3 hours to the login time so comparison will be preety simple.
DateTime Logout = Convert.ToDateTime(ds.Tables[1].Rows[0]["LogOut"]);
int var = DateTime.Compare(Login, Logout); //if login is greater time then, it takes less then 3 hours...
if (var < 0)
{
    lblCount.Text = "0";
}

Posted 14-Jun-11 20:05pm

parmar_punit

Solution 1

try this

http://stackoverflow.com/questions/807909/how-can-i-compare-time-in-sql-server

Posted 14-Jun-11 19:12pm

LakshmiNarayana Nalluri

Solution 5

Use TimeSpan with the Hours properties to get the time difference.
That is always better.

For an exmaple, see here[^].

Posted 14-Jun-11 19:17pm

Abhinav S

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Prerak Patel · Accepted Answer · 2011-06-14T19:12:00

Solution 2

Use int var = Logout.Subtract(Login).Hours;

Ref:http://www.victorchen.info/get-date-difference-in-c/[^]

Posted 14-Jun-11 19:12pm

Prerak Patel

Updated 14-Jun-11 19:13pm

v2

walterhevedeich · Accepted Answer · 2011-06-14T19:13:00

DateTime.Compare is used to check if the 2 DateTime parameters are equal or not. For this one, you might want to consider using the Hour property for your scenario. A high level approach would be to subtract Logout.Hour to Login.Hour and the check if the result is greater than 3. Refer here[^] for details.

RakeshMeena · Accepted Answer · 2011-06-14T19:14:00

Solution 4

Compare won't give you the desired result. Rather use the "Hour" property, but remember the "Hour" property will not consider the day component.

Posted 14-Jun-11 19:14pm

RakeshMeena

Updated 14-Jun-11 19:16pm

v2