How Can I Accurately Read DateTime Values from Excel Sheets in .NET?

Reading Datetime Values from Excel Sheets

Reading datetime values from Excel sheets can sometimes be tricky, resulting in discrepancies between the expected result and the obtained value. To address this issue, it's essential to understand the difference in date formats between Excel and .NET.

In Excel, dates are stored as a double representing the number of days elapsed since December 31, 1899. However, .NET uses a different date format, resulting in a mismatch when directly converting the value.

To resolve this discrepancy, you need to convert the date from OLE Automation format (used in Excel) to the .NET format. This can be achieved using the DateTime.FromOADate method.

Consider the following code snippet:

double d = double.Parse(b);
DateTime conv = DateTime.FromOADate(d);

In this example, d is the double value obtained from the Excel sheet. By passing d to DateTime.FromOADate, you convert it to the .NET datetime format and store the result in the conv variable. This will give you the correct datetime value as expected.

By utilizing this method, you can accurately extract datetime values from Excel sheets and work with them in your .NET applications seamlessly.

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