fpspread实现Excel导入

private DataTable GetExcel(string filepach)
        {
            string str;
            FarPoint.Win.Spread.FpSpread fpSpread1 = new FarPoint.Win.Spread.FpSpread();

            try
            {
                fpSpread1.OpenExcel(filepach);
            }
            catch
            {
                string filepath1=Path.GetTempPath() + "//"+ Path.GetFileName(filepach);
                File.Copy(filepach,filepath1) ;
                fpSpread1.OpenExcel(filepath1);
                File.Delete(filepath1);
            }
            DataTable dt = new DataTable();
            for (int k = 1; k <= fpSpread1.Sheets[0].GetLastNonEmptyColumn(FarPoint.Win.Spread.NonEmptyItemFlag.Data) + 1; k++)
            {
                dt.Columns.Add("col" + k.ToString());
            }

            for (int i = 0; i < fpSpread1.Sheets[0].GetLastNonEmptyRow(FarPoint.Win.Spread.NonEmptyItemFlag.Data) + 1; i++)
            {
                DataRow dr = dt.NewRow();
                str = "";
                for (int j = 0; j < fpSpread1.Sheets[0].GetLastNonEmptyColumn(FarPoint.Win.Spread.NonEmptyItemFlag.Data) + 1; j++)
                {
                    str = str + fpSpread1.Sheets[0].Cells[i, j].Text;
                    dr[j] = fpSpread1.Sheets[0].Cells[i, j].Text;
                }
                if (str != "")
                    dt.Rows.Add(dr);

            }
            return dt;

}