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i have to convert datediff of start_time and end_time into hours.I have convert this diff into minute.this will work, but i have to convert it into hours.how to do this ?
below code that i have used to convert it into minute.
 
SqlCommand cmd0 = new SqlCommand("select *,Datediff(mi,start_date,end_date) as Duration,Datediff(h,start_date,end_date) from project_log  where (end_date between '" + txt_datefrom.Text + "' and '" + txt_dateto.Text + "' or start_date between '" + txt_datefrom.Text + "' and '" + txt_dateto.Text + "') and " + ddlsearchby.SelectedValue + " LIKE '" + txt_searchText.Text + "%'", cnn);
Posted 19-Jan-13 1:57am
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Solution 1

Use HH to have difference in Hours.
 
 DATEDIFF(HH,start_date, end_date) as Hour
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Solution 2

HI,
 
you can use like the following:
 
DateTime a = new DateTime(2008, 01, 02, 06, 30, 00);
DateTime b = new DateTime(2008, 01, 03, 06, 30, 00);
TimeSpan duration = b - a;
double hours = (b-a).TotalHours;
OR
 
int days = (int)Math.Ceiling(diff.TotalDays);
 
Thanks
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