DropDownList标志控件的学习

邦定数据方法一


dbconnection conn = new dbconnection();




DataTable dt_game = new DataTable();






string sql_game = "SELECT GamesID,CName,Season,type FROM Games_Info order by Cname";






dt_game = conn.ExecuteSelectTable(sql_game);






ListItem first_Item = new ListItem();




first_Item.Value = "0";


first_Item.Text = "";




GamesID.Items.Add(first_Item);


// MatchID.Items.Add(first_Item);




foreach (DataRow dr in dt_game.Rows)




...{


ListItem li_game = new ListItem();


li_game.Text = dr["CName"].ToString();


li_game.Value = dr["GamesID"].ToString();


GamesID.Items.Add(li_game);


}

方法二


//*****填充nationid（dropdownlist）的选项


string sql = "SELECT * FROM Nations_Info order by CName";


dbconnection conn = new dbconnection();


DataTable dt = new DataTable();


dt = conn.ExecuteSelectTable(sql);




nationid.DataSource = dt.DefaultView;


nationid.DataTextField = "CName"; //dropdownlist的Text的字段


nationid.DataValueField = "NationID";//dropdownlist的Value的字段


nationid.DataBind();

取得他选项的value




protected void GamesID_SelectedIndexChanged(object sender, EventArgs e) ...{




dbconnection conn = new dbconnection();


DataTable dt_match = new DataTable();


string sql_match = "select m.MatchID,t1.CName as HomeTeamCName,t2.CName as AwayTeamCname,m.StartTime from Matchs_Info m inner join Teams_Info t1 on m.HomeTeamID = t1.TeamID inner join Teams_Info t2 on m.AwayTeamID = t2.TeamID where m.flag=3 and m.GamesID= " + GamesID.SelectedValue.ToString() + " order by m.matchid desc";


dt_match = conn.ExecuteSelectTable(sql_match);


foreach (DataRow dr in dt_match.Rows)




...{


ListItem li_match = new ListItem();


li_match.Text = dr["HomeTeamCName"].ToString() + " VS " + dr["AwayTeamCname"].ToString() + dr["StartTime"].ToString();


li_match.Value = dr["matchid"].ToString();


MatchID.Items.Add(li_match);


}


}

//在他的SelectedIndexChanged(事件(双击控件即可),取得gameid选择的value为 GamesID.SelectedValue.ToString()