How do I subtract 1 hour from DATETIME string using timespan instance

[JonDavid]

CODE:
DateTime coursestatusdate = DateTime.MinValue;
if (courseRow["coursestatusdate"].ToString() != string.Empty)
{
coursestatusdate = DateTime.Parse(courseRow
["coursestatusdate"].ToString());
//TODO: Convert coursestatusdate to CST
DateTime courseStatusDateCentralTime =
coursestatusdate.Add(System.TimeSpan.FromHours(-1));
}

I need to preserve the time for coursestatusdate, and I need courseStatusDateCentralTime to reflect : coursestatusdate - 1 hour

[JonDavid]

I was almost there. All I had to do was uncomment my declaration, and removed the DATE TIME from my conversion. ...all is well.

private void Update_Course(DataRowView courseRow, DataRow studentRow, DataView courseDV)
{
DateTime courseStatusDateCentralTime = DateTime.MinValue;
DateTime coursestatusdate = DateTime.MinValue;

if (courseRow["coursestatusdate"].ToString() != string.Empty)
{
coursestatusdate = DateTime.Parse(courseRow["coursestatusdate"].ToString());
//TODO: Convert coursestatusdate to CST
courseStatusDateCentralTime = coursestatusdate.Add(System.TimeSpan.FromHours(-1));
}

[GaryTexmo]

http://msdn.microsoft.com/en-us/libr....datetime.aspx

I think you need the AddHours method.

            DateTime now = DateTime.Now;
            DateTime nowMinusOne = now.AddHours(-1);
 
            Console.WriteLine(now.ToString());
            Console.WriteLine(nowMinusOne.ToString());

By the way, I notice you're talking about timezones in there... a handy tip if you're going to do any compares. There's a ToUniversalTime method off a DateTime object that will convert a time to universal time. I don't now if you know about it already, but I discovered it recently so maybe it will save you some trouble in the future :)

*Edit: Looks like you got got it another way, nice work!