How to compare two dates

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Hell Sir,
I want to compare two date. I am picking date from comobobox (cboDate, cboMonth, cboYear). and save it into gridview. before save i am checking this date to previous save date in gridview.

Means I am comparing two date in which one is in gridview and another one in combobox (cboDate, cboMonth, cboYear). but i am getting error for comparing dates. i am using DateTime.Compare method.

When i am taking date from combobox its only take date but from gridview its taking date and time.

C#

string doj = Convert.ToString(cboFromdate.SelectedItem.Text) + Convert.ToString(cboFromMonth.SelectedItem.Value) + Convert.ToString(cboFromYear.SelectedItem.Text);

DataTable dtTemp = new DataTable();
      dtTemp = (DataTable)Session["PreEmploymentDetail"];
      if (dtTemp != null)
      {
          for (int i = 0; i <= dtTemp.Rows.Count - 1; i++)
          {
             int result = DateTime.Compare(Convert.ToDateTime(doj), Convert.ToDateTime(dtTemp.Rows[i] ["ToDate"]));
             if(result < 0)
             {

             }

Please any one help me....

Thanks

Posted 5-Aug-12 20:18pm

ritesh88sharma

Updated 5-Aug-12 20:58pm

v3

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Comments

Rajesh Buddaraju 6-Aug-12 2:22am

Let us know what error you are getting.

ritesh88sharma 6-Aug-12 2:30am

When i am taking date from combobox its only take date but from gridview its taking date and time.

Sangramsingh Pawar 6-Aug-12 2:23am

Which error or exception you got there?

ritesh88sharma 6-Aug-12 2:33am

When i am taking date from combobox its only take date but from gridview its taking date and time.

AshishChaudha 6-Aug-12 2:24am

Please check the date format before comparing....

ritesh88sharma 6-Aug-12 2:30am

When i am taking date from combobox its only take date but from gridview its taking date and time.

AshishChaudha 6-Aug-12 2:50am

merge your comobobox (cboDate, cboMonth, cboYear) in a date format, Then compare both the dates

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Volynsky Alex · Answer 1 · 2012-08-06T10:05:00

Try following way:

C#

//your date from comobobox, i.e. cboMonth + cboDate + cboYear
DateTime d1 = ....
//your date from gridview
DateTime d2 = Convert.ToDateTime(GridView.rows(0).cells(1).text.ToString().Trim()).Date; 
if (d1 >= d2)
{
            MessageBox.Show("dt1 >= dt2");
}
else
{
            MessageBox.Show("dt1 < dt2");
}

You can read here about DateTime.Compare Method and see other example:
http://msdn.microsoft.com/en-us/library/system.datetime.compare.aspx[^]

_Amy · Answer 2 · 2012-08-05T20:43:00

Solution 2

Use Convert.ToDateTime function to convert the combobox string to DateTime.
Refer the links below:
MSDN : Convert.ToDateTime Method [^]
MSDN : Convert.ToDateTime Method (String, IFormatProvider)[^]
MSDN : Convert.ToDateTime Method (String)[^]

--Amit

Posted 5-Aug-12 20:43pm

_Amy

Sangramsingh Pawar · Answer 3 · 2012-08-05T20:40:00

You have to convert both date in perticular format like "MM/dd/yyyy"
or "dd/MM/yyyy" then apply your logic to compare date which are in same format

means you should do folowing steps
1 convert both date in same date format you can convert this using
ToString("your date format")
2 if you want use DateTime.Compare() then convert both date in DateTime.

C#

//Correct this
//Convert This date to "MM/dd/yyyy" format
string doj = Convert.ToString(cboFromMonth.SelectedItem.Value) + Convert.ToString(cboFromdate.SelectedItem.Text)
+ Convert.ToString(cboFromYear.SelectedItem.Text);


//Add This 
DateTime cmb_date=Convert.ToDateTime(doj)
DataTable dtTemp = new DataTable();
      dtTemp = (DataTable)Session["PreEmploymentDetail"];
      if (dtTemp != null)
      {
          for (int i = 0; i <= dtTemp.Rows.Count - 1; i++)
          {
           //Correct this
           //Convert gridview date to "MM/dd/yyyy" format then compare both date 
             int result = DateTime.Compare(Convert.ToDateTime(doj), Convert.ToDateTime(dtTemp.Rows[i] ["ToDate"]));
             if(result < 0)
             {

             }

How to compare two dates

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