How to Compare two DateTime input Values

Posted by Tripati.patro under C# category on 2/21/2011 | Points: 40 | Views : 4272

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private void CheckValidDateRange()
{
    if (DateComparer(DateTime.Now, DateTime.Now.AddDays(1)))
    {
        MessageBox.Show("End Date is greater or equal to Start Date.");
    }
    else
    {
        MessageBox.Show("Start Date is greater than to End Date.");
    }
}

/// <summary>
/// Compare two input date to check for valid range. 
/// </summary>
/// <param name="startDate">Start Date</param>
/// <param name="endDate">End Date</param>
/// <returns>True if End Date is greater or equal than Start Date.</returns>
private bool DateComparer(DateTime startDate, DateTime endDate)
{
    var validDateRange = false;
   // If end date is greater or equal to start date.
    if (endDate.Date.CompareTo(startDate.Date) >= 0)
    {
        validDateRange = true;
    }

    return validDateRange;
}

/// <summary>
/// Compare two input date with time to check for valid range. 
/// </summary>
/// <param name="startDate">Start Date</param>
/// <param name="endDate">End Date</param>
/// <returns>True if End Date is greater or equal than Start Date.</returns>
private bool DateTimeComparer(DateTime startDate, DateTime endDate)
{
    var validDateRange = false;
    if (endDate.CompareTo(startDate) >= 0)
    {
        validDateRange = true;
    }

    return validDateRange;
}

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Comments or Responses

Posted by: T.saravanan on: 2/22/2011 Level:Silver | Status: [Member] [MVP] | Points: 10

Hi,

Nice Try...

Using compare method achieve the same output.

 if (DateTime.Compare(DateTime.Now, DateTime.Now.AddDays(1)) <= 0)

    {

        MessageBox.Show("End Date is greater or equal to Start Date.");

    }

    else

    {

        MessageBox.Show("Start Date is greater than to End Date.");  

    }

Cheers :)

Posted by: Tripati.patro on: 2/22/2011 Level:Starter | Status: [Member] | Points: 10

Hi Saravanan,

The reason of making the code into a method is all programmers/developer will be sync to same kind of code. They should not write different way of code to compare two date values.

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