cannot import excel to datagridview in c#

Question

hello guyz i need your help, i cannot import excel to datagridview in c#.net even though I add a reference using Microsoft.Office.Interlop.Excel , I m using a visual studio 2010 and this is my source code

private void button1_Click(object sender, EventArgs e)
{
    _Application importExcelToDataGridViewAppl;
    _Workbook importExcelToDataGridViewWorkbook;
    _Worksheet importExcelToDataGridViewWorksheet;
    Range importExcelToDataGridViewRange;
    try
    {
        importExcelToDataGridViewAppl = new Microsoft.Office.Interop.Excel.Application();
        OpenFileDialog importExcelToDataGridViewFileDialog = new OpenFileDialog();
        importExcelToDataGridViewFileDialog.Title= "yahoo";
        importExcelToDataGridViewFileDialog.Filter = "Choose Excel File | *.xlsx;*.xls;*.xlsm";
       // importExcelToDataGridViewFileDialog.Title = "Import Excel File";
        if (importExcelToDataGridViewFileDialog.ShowDialog() == DialogResult.OK)
        {
            importExcelToDataGridViewWorkbook = importExcelToDataGridViewAppl.Workbooks.Open(importExcelToDataGridViewFileDialog.FileName);
            importExcelToDataGridViewWorksheet = importExcelToDataGridViewWorkbook.ActiveSheet;
            importExcelToDataGridViewRange = importExcelToDataGridViewWorksheet.UsedRange;

            //
            for (int excelWorkSheetRowIndex=0;excelWorkSheetRowIndex < importExcelToDataGridViewRange.Rows.Count; excelWorkSheetRowIndex++)
            {
                dataGridView1.Rows.Add(importExcelToDataGridViewWorksheet.Cells[excelWorkSheetRowIndex,1].Value,);

            }

        }
    }
    catch (Exception ex)
    {
    }
    finally
    {
    }

}