CRM 4.0 - Uso del DateTime

Se convierten en DateTime y se aplica el Compare

Tipo de valor
 Condición

Menor que cero
 t1 es menor que t2.

Cero
 t1 es igual a t2.

Mayor que cero
 t1 es mayor que t2.



 public static int Compare (
 DateTime t1,
 DateTime t2
)

CRMDateTime To  DateTime

When working with CrmDateTime, you'll notice that this type does have a .value attribute,
but the type of this attribute is string. There is no attribute to get the .net class DateTime out of your CrmDateTime.
If you do want to use a DateTime anyway, you'd easily need to convert it. You could use any of these:

Convert.ToDateTime(crmdatetime.Value)
DateTime.Parse(crmdatetime.Value)

For more information on the CrmDateTime, look in the SDK:
http://msdn2.microsoft.com/en-us/library/aa613542.aspx

DateTime to CRMDateTime

static public CrmDateTime ConvertToCRMDateTime(DateTime dateTime) {
            CrmDateTime crmDateTime = new CrmDateTime();
            crmDateTime.date = dateTime.ToShortDateString();
            crmDateTime.time = dateTime.ToShortTimeString();
            TimeSpan offset = TimeZone.CurrentTimeZone.GetUtcOffset(dateTime);
            string sOffset = string.Empty;

            if (offset.Hours < 0) {
                sOffset = "-" + offset.ToString().Substring(1, 4);
            }
            else {
                sOffset = "+" + offset.ToString().Substring(0, 5);
            }
            //sOffset += offset.Minutes.ToString().PadLeft(2, '0');
            crmDateTime.Value = dateTime.ToString(string.Format("yyyy-MM-ddTHH:mm:ss{0}", sOffset));
            return crmDateTime;
        }

Uso de formato de fechas según cultura e idioma

DateTimeFormatInfo dfi = new DateTimeFormatInfo();
//CultureInfo ci = new CultureInfo("es-ES");
CultureInfo ci = new CultureInfo("en-US");

dfi.MonthDayPattern = "MM-MMMM, ddd-dddd";
DateTime time = new DateTime();
time = DateTime.Now;
       
Label1.Text = time.ToString("f",ci);