How to export DataTable to Excel

Question

How can I export a DataTable to Excel in C#? I am using Windows Forms. The DataTable is associated with a DataGridView control. I have

Answer 1

Old thread - but thought i would throw my code in here. I wrote a little function to write a data table to a new excel sheet at a specified path (location). Also you will need to add a reference to microsoft excel 14.0 library.

I pulled from this thread on writing anything to excel - How to write some data to excel file(.xlsx)

i used that to extrapolate how to write a datatable

*note in catch statements i have an errorhandler static class reference (you can ignore those)

 using excel = Microsoft.Office.Interop.Excel;
 using System.IO;
 using System.Data;
 using System.Runtime.InteropServices;

 //class and namespace wrapper is not shown in this example 

 private void WriteToExcel(System.Data.DataTable dt, string location)
    {
        //instantiate excel objects (application, workbook, worksheets)
        excel.Application XlObj = new excel.Application();
        XlObj.Visible = false;
        excel._Workbook WbObj = (excel.Workbook)(XlObj.Workbooks.Add(""));
        excel._Worksheet WsObj = (excel.Worksheet)WbObj.ActiveSheet;

        //run through datatable and assign cells to values of datatable
        try
        {
            int row = 1; int col = 1;
            foreach (DataColumn column in dt.Columns)
            {
                //adding columns
                WsObj.Cells[row, col] = column.ColumnName;
                col++;
            }
            //reset column and row variables
            col = 1;
            row++;
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                //adding data
                foreach (var cell in dt.Rows[i].ItemArray)
                {
                    WsObj.Cells[row, col] = cell;
                    col++;
                }
                col = 1;
                row++;
            }
            WbObj.SaveAs(location);
        }
        catch (COMException x)
        {                
            ErrorHandler.Handle(x);
        }
        catch (Exception ex)
        {               
            ErrorHandler.Handle(ex);
        }
        finally
        {
            WbObj.Close();                
        }
    }