MVC SelectList在文本字段中组合多列

大--£200中等--£150小——100英镑控制器代码为: var stand = db.Stands.Where(s => s.ExhibitorID == null).ToList();ViewBag.StandID = new SelectList(stands,"StandID", "Description" + "-- £" + "Rate");...我的观点是(目前): @Html.DropDownList("StandID", "--Select--")...但是描述"+--£"+价格")；不会运行:数据绑定:'System.Data.Entity.DynamicProxies.Stand_63F8C9F623B3C0E57D3008A57081AFCD9C39E1A6B79B0380B60840F1EFAE9DB4'不包含名为Description--£Rate"的属性.感谢您的帮助，标记 解决方案 您可以使用简单的 LINQ 投影创建一个新的匿名类，然后使用 SelectList(IEnumerable, string, string) 构造函数重载 用于指定值和文本字段用于 元素，即:var 代表 =db.stands.Where(s => s.ExhibitorID == null).Select(s => new{StandID = s.StandID,Description = string.Format("{0}-- £{1}", s.Description, s.Rate)}).ToList();ViewBag.StandID = new SelectList(stands, "StandID", "Description")编辑在 C#6 及更高版本中，字符串插值使得效果更好阅读比string.Format ...描述 = $"{s.Description}-- £{s.Rate}"如果你投射到一个强 ViewModel 类名(而不是一个匿名类)，你无疑会想用 nameof 运营商:ViewBag.StandID = new SelectList(stands, nameof(Stand.StandID), nameof(Stand.Description));How would I generate a select list, where the text field, is made up of two or more text columns, eg: Where I have a Description and Rate field in my database, I want to combine these to show:Large--£200Medium--£150Small--£100Controller code is: var stands = db.Stands.Where(s => s.ExhibitorID == null).ToList(); ViewBag.StandID = new SelectList(stands,"StandID", "Description" + "-- £" + "Rate");...and my view is (currently): <div class="editor-field"> @Html.DropDownList("StandID", "--Select--") </div> ...but the "Description" + "-- £" + "Rate"); won't run: DataBinding: 'System.Data.Entity.DynamicProxies.Stand_63F8C9F623B3C0E57D3008A57081AFCD9C39E1A6B79B0380B60840F1EFAE9DB4' does not contain a property with the name 'Description--£Rate'.Thanks for any help,Mark 解决方案 You could create a new anonymous class using a simple LINQ projection, and then use the SelectList(IEnumerable, string, string) constructor overload to specify the value and text fields to be used for the <option> elements i.e.:var stands = db.Stands .Where(s => s.ExhibitorID == null) .Select(s => new { StandID = s.StandID, Description = string.Format("{0}-- £{1}", s.Description, s.Rate) }) .ToList();ViewBag.StandID = new SelectList(stands, "StandID", "Description")EditIn C#6 and later, string interpolation makes for better reading than string.Format ... Description = $"{s.Description}-- £{s.Rate}"If you project to a strong ViewModel class name (instead of to an anonymous class), you will undoubtedly want to replace the magic strings with the safety of the nameof operator:ViewBag.StandID = new SelectList(stands, nameof(Stand.StandID), nameof(Stand.Description)); 这篇关于MVC SelectList在文本字段中组合多列的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！