Automate Excel using C#


Excel can be easily automated using C#. At first you must check that the Microsoft.Office.Interop.Excel is referenced. When the Framework 4.0 is targeted you should check that the Microsoft.CSharp.dll is referenced too.



using System;
using Excel = Microsoft.Office.Interop.Excel;
//...
Excel.Application xlApp = new Excel.Application();
//_Application xlApp = new Excel.Application();
xlApp.Visible = true;
//create a workbook
Workbook wb = xlApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);
//or open a workbook
Workbook wb = xlApp.Workbooks.Open("c:\\book.xlsx");
 
//get the first worksheet
Worksheet ws = (Worksheet)wb.Worksheets[1]; //Worksheets["Sheet1"]
//create a worksheet
Worksheet ws2 = (Worksheet)wb.Worksheets.Add();
//retrieve a range
Range range = (Range)ws.Range["a1"];
Range range2 = (Range)ws.Cells[1, 1]; //the A1 cell
 
range.Value="arkoudaki";
//alternative way to do the same thing
//range2.set_Value(XlRangeValueDataType.xlRangeValueDefault,"arkouda");

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