C#.NET读取Excel

try
{
    string filePath = "";
    if (UploadFile1.Value == "")
    {
        Page.RegisterStartupScript("", "<script>alert('请选择要上传的文件！');</script>");
        return;
    }
    else
    {
        filePath = UploadFile1.Value;
        string name = filePath.Substring(filePath.LastIndexOf("\") + 1).ToString();
        filePath = path + DateTime.Now.ToString("yyyy-MM-dd hh-mm-ss") + "_" + name;
        string exp = name.Substring(name.LastIndexOf(".") + 1);
        UploadFile1.PostedFile.SaveAs(filePath);
        string strCon = "";
        
        if (exp != "xls" && exp != "XLS" && exp != "xlsx" && exp != "XLSX")
        {
            Page.RegisterStartupScript("error", "<script>alert('文件格式不对！');</script>");
        }
        else
        {
            if (exp == "xls" || exp == "XLS")
            {
                strCon = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=" + filePath + ";Extended Properties=Excel 8.0";
            }
            else
            {
                strCon = "Provider=Microsoft.ACE.OleDb.12.0;Data Source=" + filePath + ";Extended Properties=Excel 12.0";
            }
            
            using(OleDbConnection myConn = new OleDbConnection(strCon)){
                myConn.Open();
                if (name != "")
                {
                    DataTable schemaTable = myConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });    //获取表名
                    if (schemaTable.Rows.Count > 0)
                    {
                        string tablename = schemaTable.Rows[0]["TABLE_NAME"].ToString();//获到Execl表名
                        string sql = "select * from [" + tablename + "]";
                        OleDbDataAdapter da = new OleDbDataAdapter(sql, myConn);
                        DataSet ds = new DataSet();
                        IList<Book> PersonList = new List<Book>();
                        da.Fill(ds);//将要导入的Execl表内容填充到DataSet数据集中
                        int r = ds.Tables[0].Rows.Count;

                        if (r > 0)//判断Execl表是否有内容
                        {
                            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                            {
                                Book entity = new Book();

                                #region 需要导入的字段
                                
                                entity.No = ds.Tables[0].Rows[i]["编号"].ToString().Trim();
                                entity.BookName = ds.Tables[0].Rows[i]["书名"].ToString().Trim();
                                entity.Author = ds.Tables[0].Rows[i]["作者"].ToString().Trim();
                                entity.Price = ds.Tables[0].Rows[i]["价格"].ToString().Trim();
                                #endregion

                                _BookBO.Save(entity);
                            }

                        }
                    }
                }
            }
        }

    }
}
catch (Exception ex)
{
    Response.Write(ex.Message);
}