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languy languy is offline
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Default Fetching datetime/user-defined field from Excel?

Hi there,

I did find a way to solve this problem.

I figured out that dates in Excel are based on 1/1/1900, so the # I am
getting is the # of days since then. Thus if I do something like
illustratred in the snip below then it will then give me the correct date as
is.

-- snip --
double dbl = (double)values.GetValue(1, i);
TimeSpan dateFromExcel = new TimeSpan((int)dbl-2,0,0,0);
DateTime resultingDate = new DateTime(1900,1,1).Add(dateFromExcel);
-- snip --

Hth
Jess

"languy" wrote in message
...
Hi there,

I have a problem retrieving a datetime from an Excel Worksheet. I have
tried to retrieve the date both from a user-defined field (which is the
original format) and from a datetime field. When fetching the data using
the Excel COM api i C# I will get the data as a double and this double is
even not the ticks that corresponds to the time.

-- snip --
private object[] ConvertToArray(System.Array values)
{
object[] theArray = new object[values.Length];
for (int i = 1; i <= values.Length; i++)
{
// when it is a DateTime or User-Defined field in Excel a double is
returned here ???
object obj = values.GetValue(1, i);

theArray[i-1] = (string)values.GetValue(1, i).ToString();
}
return theArray;
}

Excel.Workbook theWorkbook = null;
Excel.Application ExcelObj = new Excel.Application();
object mv = Missing.Value;
theWorkbook = ExcelObj.Workbooks.Open(
"c:\\navision_drift.xls", mv, mv, mv,
mv, mv, mv, mv, mv, mv, mv,
mv, mv, mv, mv);

Excel.Range range = worksheet.get_Range("A"+i.ToString(), "H" +
i.ToString());
System.Array myvalues = null;
myvalues = (System.Array)range.Cells.Value2;
object[] strArray = ConvertToArray(myvalues);
-- snip --

Does anyone know how to fetch the datetime field as is and prevent it from
being converted to a double?

I hope for a soon reply on this.

Thanks in regards,
Jess