Importar Excel a DataGrid

[varta]

Bueno, al final lo he hecho de una forma un poca mas "rustica",

Código:

if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {


                Microsoft.Office.Interop.Excel.Application xlApp;
                Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
                Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
                object misValue = System.Reflection.Missing.Value;

                xlApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
                xlWorkBook = xlApp.Workbooks.Open(openFileDialog1.FileName, 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
                xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);



                //damos valores a los datagridview
                //matriz de terminosFuente 
                for (int j = 0; j < numericUpDownTerminosFuente.Value; j++)
                {

                    for (int i = 0; i < numericUpDownEspecies.Value; i++)
                    {
                        Excel.Range rg = (Excel.Range)xlWorkSheet.Cells[j + 2,i + 2 ];
                                                
                        dataGridView1[i, j].Value = rg.Value;
                    }
                }                
              }