private DataSet GetSetInfo(string type, string Path)
        {
            string SqlString = "";
            if (type == ".xls")//导入格式
            {
                SqlString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'", Path);          //2003版本Excel
            }
            else
            {
                SqlString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'", Path);         //2007版本Excel
            }

            try
            {
                OleDbConnection cnnxls = new OleDbConnection(SqlString);        //开始读取

                OleDbDataAdapter myDa = null;
                myDa = new OleDbDataAdapter("select * from [Sheet1$]", cnnxls);     //读取表名为Sheet1
                DataSet ds = new DataSet();
                myDa.Fill(ds, "TableInfo");    //将读取到的表数据添加到DataSet中
                return ds;
            }
            catch
            {
                MessageBox.Show("操作错误！");
                return null;
            }
        }