返回dataset

sqldata类里 

#region  返回DataSet类型数据
    /// <summary>
    /// 此方法返回一个DataSet类型
    /// </summary>
    /// <param name="SqlCom">要执行的SQL语句</param>
    /// <returns></returns>
    public DataSet ExceDS(string SqlCom)
    {
        try
        {
            sqlcom = new SqlCommand(SqlCom, sqlcon);
            sqldata = new SqlDataAdapter();
            sqldata.SelectCommand = sqlcom;
            DataSet ds = new DataSet();
            sqldata.Fill(ds);
            return ds;
        }
        finally
        {
            sqlcon.Close();
        }
    }
    #endregion

 

在其他类中调用

 public static DataTable getPicNewsList()
    {
        //return DBQuery.OpenQuery("select * from PicNews order by ID asc");
        SqlData sd = new SqlData();
        return sd.ExceDS("Select * from PicNews order by ID asc").Tables[0];
    }