Excel date format using EPPlus

Question

I\'m having trouble with format my cells to Date.

FileInfo info = new FileInfo(path);
using (ExcelPackage package = new ExcelPackage(info))
{
      ExcelWork         


        

Answer 1

Generic solution which takes IEnumerable (data) it loops through the properties of the generic object finds which is of DateType or nullableDate Type and applies formatting:

   //set the list of dateColumns which will be used to formate them
            List dateColumns = new List();

            //get the first indexer
            int datecolumn = 1;

            //loop through the object and get the list of datecolumns
            foreach (var PropertyInfo in data.FirstOrDefault().GetType().GetProperties())
            {
                //check if property is of DateTime type or nullable DateTime type
                if (PropertyInfo.PropertyType == typeof(DateTime) || PropertyInfo.PropertyType == typeof(DateTime?))
                {
                    dateColumns.Add(datecolumn);
                }
                datecolumn++;
            }

            // Create the file using the FileInfo object
            var file = new FileInfo(outputDir + fileName);

            //create new excel package and save it
            using (var package = new ExcelPackage())
            {
                //create new worksheet
                var worksheet = package.Workbook.Worksheets.Add("Results");


                // add headers
                worksheet.Cells["A1"].LoadFromCollection(data, true);

                //format date field 
                dateColumns.ForEach(item => worksheet.Column(item).Style.Numberformat.Format = "dd-mm-yyyy");

                // auto size columns
                worksheet.Cells.AutoFitColumns();

                //save package
                package.SaveAs(file);
            }