Asp.net mvc MVC3选择值
在我的模型中:Asp.net mvc MVC3选择值,asp.net-mvc,asp.net-mvc-3,selectedvalue,Asp.net Mvc,Asp.net Mvc 3,Selectedvalue,在我的模型中: public SelectList QuestionGroupSelectList { get; set; } ------ List<QuestionGroup> questionGroupList = questionGroupRepository.GetQuestionGroup_BySurveyId(survey.Id); Dictionary<int, string> questionGroupDictionary = questionGro
public SelectList QuestionGroupSelectList { get; set; }
------
List<QuestionGroup> questionGroupList = questionGroupRepository.GetQuestionGroup_BySurveyId(survey.Id);
Dictionary<int, string> questionGroupDictionary = questionGroupList.ToDictionary(l => l.Id, l => l.Name);
QuestionGroupSelectList = new SelectList(questionGroupDictionary, "key", "value", questionGroupId);
---------------------------------------
In view:
@Html.DropDownList("QuestionGroupSelectList", Model.QuestionGroupSelectList, "Choose Here")
公共选择列表问题组选择列表{get;set;}
------
List questionGroupList=questionGroupRepository.GetQuestionGroup_BySurveyId(survey.Id);
Dictionary questionGroupDictionary=questionGroupList.ToDictionary(l=>l.Id,l=>l.Name);
QuestionGroupSelectList=新的SelectList(questionGroupDictionary,“键”,“值”,questionGroupId);
---------------------------------------
鉴于:
@Html.DropDownList(“QuestionGroupSelectList”,Model.QuestionGroupSelectList,“选择此处”)
当我调试时,我在QuestionGroupSelectList中得到两个项目(一个Id为30,一个Id为35),它表示selectedValue为35(questionGroupId=35)
但是selectedvalue在视图中不起作用,有什么想法吗
提前谢谢 应该使用不同的属性将dropdownlist值绑定到。此外,还应使用视图模型和强类型帮助器,如下所示:
public class MyViewModel
{
public int QuestionGroupId { get; set; }
public SelectList QuestionGroupSelectList { get; set; }
}
然后,您可以拥有一个控制器操作,该操作填充此视图模型并将其传递给视图:
public ActionResult Foo()
{
// This collection could come from anywhere
// normally you will query a repository here to fetch those values
var values = new[]
{
new { Key = "1", Value = "item 1" },
new { Key = "2", Value = "item 2" },
new { Key = "3", Value = "item 3" },
}
var model = new MyViewModel
{
// preselect the second value
QuestionGroupId = 2,
QuestionGroupSelectList = new SelectList(values, "Key", "Value")
}
return View(model);
}
最后,在你看来:
@model MyViewModel
@Html.DropDownListFor(
x => x.QuestionGroupId,
Model.QuestionGroupSelectList,
"Choose Here"
)
为什么要访问模型中的存储库而不是控制器?我听说您应该让控制器尽可能小。不知道这是不是真的。