c# - 如何将LINQ数据绑定(bind)到下拉列表

该代码的最后两行无法正常工作-结果从LINQ查询返回。我只是不确定如何将结果中的指示列成功绑定(bind)到下拉列表的文本字段和值字段:

    protected void BindMarketCodes()
    {
        List<lkpMarketCode> mcodesList = new List<lkpMarketCode>();

        LINQOmniDataContext db = new LINQOmniDataContext();

        var mcodes = from p in db.lkpMarketCodes
                        orderby 0
                        select p;

        mcodesList = mcodes.ToList<lkpMarketCode>();

        //bind to Country COde droplist
        dd2.DataSource = mcodesList;
        dd2.DataTextField = mcodesList[0].marketName;
        dd2.DataValueField = mcodesList[0].marketCodeID.ToString();

    }

最佳答案

参见下面的修订代码

protected void BindMarketCodes()
{
    using (var dataContext = new LINQOmniDataContext()) {
        //bind to Country COde droplist
        dd2.DataSource = from p in dataContext.lkpMarketCodes
            orderby p.marketName
            select new {p.marketCodeID, p.marketName};
        dd2.DataTextField = "marketName";
        dd2.DataValueField = "marketCodeID";
        dd2.DataBind();
    }
}