Dim Excel As New Microsoft.Office.Interop.Excel.Application()
        excel.Visible = True
        Dim workbook As Microsoft.Office.Interop.Excel.Workbook = excel.Workbooks.Add(System.Reflection.Missing.Value)
        Dim sheet1 As Microsoft.Office.Interop.Excel.Worksheet = DirectCast(workbook.Sheets(1), Microsoft.Office.Interop.Excel.Worksheet)
        Dim StartCol As Integer = 1
        Dim StartRow As Integer = 1

        For j As Integer = 0 To DataGridView1.Columns.Count - 1
            Dim myRange As Microsoft.Office.Interop.Excel.Range = DirectCast(sheet1.Cells(StartRow, StartCol + j), Microsoft.Office.Interop.Excel.Range)
            myRange.Value2 = DataGridView1.Columns(j).HeaderText
        Next
        StartRow += 1
        For i As Integer = 0 To DataGridView1.Rows.Count - 1
            For j As Integer = 0 To DataGridView1.Columns.Count - 1

                Try
                    Dim myRange As Microsoft.Office.Interop.Excel.Range = DirectCast(sheet1.Cells(StartRow + i, StartCol + j), Microsoft.Office.Interop.Excel.Range)
                    myRange.Value2 = If(DataGridView1(j, i).Value Is Nothing, "", DataGridView1(j, i).Value)
                Catch
                End Try

            Next
        Next

        For i As Integer = 0 To DataGridView1.Rows.Count - 1
            For j As Integer = 0 To DataGridView1.Columns.Count - 1
                If j = 3 Then GoTo 100 'Bu satırı ekleyin...
                Try
                    Dim myRange As Microsoft.Office.Interop.Excel.Range = DirectCast(sheet1.Cells(StartRow + i, StartCol + j), Microsoft.Office.Interop.Excel.Range)
                    myRange.Value2 = If(DataGridView1(j, i).Value Is Nothing, "", DataGridView1(j, i).Value)
                Catch
                End Try
100:'Bu satırı ekleyin...
            Next
        Next