SqlHelper

1  class SqlDataReader1
    {
        //连接字符串
        public static readonly string connectString = ConfigurationManager.ConnectionStrings["xiaoCeShi"].ConnectionString;
       /// <summary>
        /// 输入名字模糊查询输出可能学生的ID和名字
       /// </summary>
       /// <param name="sql"> 查询语句</param>
       /// <returns>返回查询的名字和ID数组</returns>
        public static string[] GetPosibleSut(string sql)
        {
            string NameIDArray="";
            if (connectString!=null)
            {
                using (SqlConnection sqlconn = new SqlConnection(connectString))
                {
                    SqlCommand sqlcomm = new SqlCommand( sql,sqlconn);
                    //打开连接
                    sqlconn.Open();
                    //执行查询
                 SqlDataReader dr = sqlcomm.ExecuteReader(CommandBehavior.CloseConnection);
                    //如果读取到相应的数据执行循环
                while(dr.Read())
                 {
                         NameIDArray += "ID"+dr["StudentId"].ToString() +"----------------Name"+dr["StudentName"].ToString()+",";
                 }
                   
                }
                
            }
            return NameIDArray.TrimEnd(',').Split(',');
        }
        public static string[] GetPosibleSutByAda(string sql)
        {
            string NameIDArray = "";
            using (SqlConnection conn=new SqlConnection(connectString))
            {
                SqlCommand comm = new SqlCommand(sql,conn);
                SqlDataAdapter da = new SqlDataAdapter(comm);
                DataSet ds = new DataSet();
                da.Fill(ds);
                DataTable dt=ds.Tables[0];
                if (dt!=null)
                {
                    foreach (DataRow item in dt.Rows)
                    {

                        NameIDArray += "ID" + item["StudentId"].ToString() + "----------------Name" + item["StudentName"].ToString() + ",";
                    }
                    
                }

                
            }
             return NameIDArray.TrimEnd(',').Split(',');

        }
    }