Question

我试图从这个数据对象团队获取数据，然后将其传递给列表。当我运行程序而不是数据时，我得到System.Data.DataRowCollection。请让我知道我在这里做错了什么？

public ActionResult notifications()
    {
        List<notifications> Teamwon = Getsports();
        return View(Teamwon);
    }
    public List<notifications> Getsports()
    {
        string lname;
        string lvenue;
        string ldate;
        string lteam1;
        string lteam2;
        string leaname = "0";
        string leavenue = "0";
        string leadate = "0";
        string wteam = "0";

        SqlConnection sqlConnection1 = new SqlConnection("Persist Security Info=False;Integrated Security=true;Initial Catalog=Remember;server=DESKTOP-59SGH72\\SQLEXPRESS;Database=sport;Trusted_Connection=True");
        SqlCommand cmd = new SqlCommand();
        SqlDataAdapter usersport = new SqlDataAdapter("select sports_details_id from users_sports_following where user_id ='" + Session["userid"] + "'", sqlConnection1);
        DataSet sportds = new DataSet();
        usersport.Fill(sportds);
        int count = sportds.Tables[0].Rows.Count;
        List<string[]> leaguelist = new List<string[]>();
         List<string[]> teamlist = new List<string[]>();
        while (count != 0)
        {
            Int16 id = Convert.ToInt16(sportds.Tables[0].Rows[count-1]["sports_details_id"].ToString());

           using (SqlDataAdapter leagueDetails = new SqlDataAdapter("select league_name, league_details_venue,league_details_date,sports_details_id1,sports_details_id2 from leagues, league_details where sports_details_id1 in ('" + id + "') or sports_details_id2 in ('" + id + "')", sqlConnection1))
            {
                DataSet leagues = new DataSet(); 
                leagueDetails.Fill(leagues).ToString();

                lname = leagues.Tables[0].Rows[0]["league_name"].ToString();
                lvenue = leagues.Tables[0].Rows[0]["league_details_venue"].ToString();
                ldate = leagues.Tables[0].Rows[0]["league_details_date"].ToString();
                lteam1 = leagues.Tables[0].Rows[0]["sports_details_id1"].ToString();
                lteam2 = leagues.Tables[0].Rows[0]["sports_details_id2"].ToString();

                string[] fields = new string[5];
                fields[0] = lname;
                fields[1] = lvenue;
                fields[2] = ldate;
                fields[3] = lteam1;
                fields[4] = lteam2;
                leaguelist.Add(fields);
            } 
            count = count - 1;
        }           
        List<notifications> notificationlist = new List<notifications>();
        foreach (string[] fields in leaguelist)
        {
             leaname = fields[0];
             leavenue = fields[1];
             leadate = fields[2];
            var id1 = fields[3];
            var id2 = fields[4];

            SqlConnection sqlConnection2 = new SqlConnection("Persist Security Info=False;Integrated Security=true;Initial Catalog=Remember;server=DESKTOP-59SGH72\\SQLEXPRESS;Trusted_Connection=True;Database=sport");
            SqlDataAdapter ds = new SqlDataAdapter("team", sqlConnection2);
            ////mention the adaptor that it needs to ru stored procedure
            ds.SelectCommand.CommandType = CommandType.StoredProcedure;
            ds.SelectCommand.Parameters.Add("@sports_details_id1", id1);
            ds.SelectCommand.Parameters.Add("@sports_details_id2", id2);

            //fill the dataset
            DataSet da = new DataSet();
            ds.Fill(da).ToString();
            string team = da.Tables[0].Rows.ToString();
            notificationlist.Add( new notifications
            {
                leaguename = leaname,
                leaguevenue = leavenue,
                date = leadate,
                teamwon = team
            });
        }
        return notificationlist;
    }
}

}

请帮助我如何从团队对象中获取数据.. !!我正在将通知列表发送到我的视图中。我获取除团队对象

中的数据之外的所有数据

Answer 1

ToString()中的da.Tables[0].Rows.ToString();赋值肯定会返回System.Data.DataRowCollection，因为该方法返回DataTable.Rows的类型而不是行值。检索行值的正确用法应如下所示：

// both 'rowIndex' and 'columnIndex' are int values (must be positive & start from 0)
da.Tables[0].Rows[rowIndex][columnIndex].ToString();

或使用列部分的列名称：

da.Tables[0].Rows[rowIndex]["columnName"].ToString();

使用来自for的计数器的foreach或ds.Tables[0].Rows循环，分配行和列索引以从存储的行中提取值，如下例所示：

for (int i = 0; i < ds.Tables[0].Rows.Count; i++) 
{
    // other stuff

    // assumed you want to pull "teamwon" column
    string team = da.Tables[0].Rows[i]["teamwon"].ToString();

    // add values to the list
    notificationlist.Add(new Notification { leaguename = leaname, leaguevenue = leavenue, date = leadate, teamwon = team });

    // other stuff
}

如何从数据集中获取数据并将其传递给列表？

1 个答案: