generate_excel.cs

using Excel = Microsoft.Office.Interop.Excel;


class Program 
{
 public static void Main(string[] args)
 {
  dynamic[] data = new dynamic[2];
  data[0] = new {
                    ID = "1",
                    CODE = "1",
                    NAME = "Test 1",                    
                };
  data[1] = new {
                    ID = "2",
                    CODE = "2",
                    NAME = "Test 2",                    
                };
  data[2] = new {
                  ID = "3",
                  CODE = "3",
                  NAME = "Test 3",                    
              };
  GenerateGenericExcel(data) ;
 }
 
 static void GenerateGenericExcel(dynamic[] data, string filename = "test.xlsx") {

         //   ColumnDescriptionList Header = new ColumnDescriptionList();

            Excel.Application xlApp = new Excel.Application();

            if (xlApp == null || data.Length == 0)
            {
                return;
            }
            
            Excel.Workbook xlWorkBook = xlApp.Workbooks.Add(Type.Missing);
            Excel.Worksheet xlWorkSheet = null;
            xlWorkSheet = xlWorkBook.Sheets["Sheet1"];
            xlWorkSheet = xlWorkBook.ActiveSheet;
            
            //Excel.Workbook xlWorkBook = xlApp.Workbooks.Open(Filename: @Path.Combine(rootDirectory, "Templates", "Template.xlsx"), Editable: true);
            //Excel.Worksheet xlWorkSheet = (Excel.Worksheet)xlWorkBook.Sheets["Sheet1"];

            object misValue = System.Reflection.Missing.Value;

            Excel.Range cells = xlWorkBook.Worksheets[1].Cells;
            cells.NumberFormat = "@";
            
            //Create Header
            int index = 1;
            foreach (var prop in data[0].GetType().GetProperties())
            {
              //  xlWorkSheet.Cells[1, index] = Header.Items[prop.Name];
               xlWorkSheet.Cells[1, index] = prop.Name;
                index++;
            }
            
            //Create Content
            for (int i = 0, cell = 2; i < data.Length; i++, cell++)
            {
                var prop = data[i].GetType().GetProperties();
                for (int j = 0; j < prop.Length; j++)
                {
                    var value = data[i].GetType().GetProperty(prop[j].Name).GetValue(data[i], null);
                    xlWorkSheet.Cells[cell, j + 1] = value;
                }
            }

            xlWorkSheet.Columns.AutoFit();

            xlWorkBook.SaveAs(Path.Combine(saveLocation, filename), Excel.XlFileFormat.xlWorkbookDefault, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
            xlWorkBook.Close(true, misValue, misValue);
            xlApp.Quit();
        }

}