program that can put a datatable into an excel spreadsheet

I need to look at a program that can put a datatable into an excel spreadsheet in 2.0

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this is a datatable using the viewer built in.
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create a class file for this code and set a reference to the  Microsoft.Office.Interop.Excel
after that set this:

Using Excel = Microsoft.Office.Interop.Excel;
public class ExcelPush
        Excel.ApplicationClass _excel = new Excel.ApplicationClass();

        public ExcelPush()
            // TODO: Add constructor logic here

        public Excel.Worksheet Activate()
            // open new excel spreadsheet
                Excel.Workbook workbook = _excel.Workbooks.Add(Type.Missing);
                _excel.Visible = true;
                Excel.Worksheet ws = (Excel.Worksheet)_excel.ActiveSheet;
                return ws;
            catch (Exception ex)

            return null;

        public void AddItemToSpreadsheet(int row, int column, Excel.Worksheet ws, string item)
            ((Excel.Range)ws.Cells[row, column]).Value2 = item;

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mathieu_cuprykAuthor Commented:
Can you help me go back to
Protected Sub btnToExcelByObjects_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnToExcelByObjects.Click
            Dim xlWorkBook As Excel.Workbook
            Dim xlWorkSheet As Excel.Worksheet
            xlWorkBook = New Excel.Application().Workbooks.Add(Missing.Value)
            xlWorkBook.Application.Visible = True
            xlWorkSheet = xlWorkBook.ActiveSheet
            '   Gets the dataset containing the data
            Dim dsData As DataSet = getData()
            Dim i As Integer = 2
            '   Outputting the fieldnames in pink bold color
            xlWorkSheet.Cells(1, 1) = "Student ID"
            xlWorkSheet.Cells(1, 2) = "Student Name"
            xlWorkSheet.Cells(1, 3) = "Mathematics"
            xlWorkSheet.Cells(1, 4) = "Geography"
            xlWorkSheet.Cells(1, 5) = "Total"
            xlWorkSheet.Range("$A1:$E1").Font.ColorIndex = Excel.Constants.xlColor1
            xlWorkSheet.Range("$A1:$E1").Font.Bold = True
            '   Outputting the data
            For Each dr As DataRow In dsData.Tables(0).Rows
                xlWorkSheet.Cells(i, 1) = dr(0)
                xlWorkSheet.Cells(i, 2) = dr(1)
                xlWorkSheet.Cells(i, 3) = dr(2)
                xlWorkSheet.Cells(i, 4) = dr(3)
                '   Building the formula for calculating the sum
                xlWorkSheet.Cells(i, 5).Formula = "=SUM($C{0}:$D{0})".Replace("{0}", i.ToString())
                '   Going to the next row
                i = i + 1
            '   Auto fit the columns
            '   Generating the graph
            Dim chart As Excel.Chart
            chart = xlWorkBook.Charts.Add()
            With chart
                .ChartType = Excel.XlChartType.xlColumnClustered
                .SetSourceData(xlWorkSheet.Range("A1:E11"), 2)
                .HasTitle = True
                .ChartTitle.Characters.Text = "Students' marks"
                .Axes(1, Excel.XlAxisGroup.xlPrimary).HasTitle = True
                .Axes(1, Excel.XlAxisGroup.xlPrimary).AxisTitle.Characters.Text = "Students"
                .Axes(2, Excel.XlAxisGroup.xlPrimary).HasTitle = True
                .Axes(2, Excel.XlAxisGroup.xlPrimary).AxisTitle.Characters.Text = "Marks"
            End With
        Catch ex As Exception
            Throw ex
        End Try
    End Sub
My VB.Net is far to rusty... however you could just use the C# class file as a separate project that your vb app would reference calls...  sorry.. I am Pro-CSharp
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mathieu_cuprykAuthor Commented:
Where are u passing the datatable?
you would have to loop through the datatable rows/columns and call the AddItemToSpreadsheet function.  
mathieu_cuprykAuthor Commented:
Can you help me get started.
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