如何将数据放入下拉框并通过键入来搜索它?

时间:2015-08-24 09:13:02

标签: javascript jquery html asp.net-mvc asp.net-mvc-4

我正在努力将数据放入下拉框中。数据不是预定义的数据集,因此它不像将数据硬编码到下拉框中那么简单。数据已创建,一旦创建,我希望它在下拉框中填充。目前,数据已通过复选框显示。我也希望有一个能够调出intellisense的搜索功能。例如,当我输入“ALE”时,我希望它显示带有字母“ALE”的数据,例如“Alex”,“Alexander”,“Alexis”等。请理解我对MVC很新

简而言之,我正在努力摆脱我的计划。我的程序创建“研究人员”,一旦系统上捕获“研究员”,“研究员”现在可以进行研究“提交”。因此,当捕获“提交”时,“研究员”应该能够从下拉框中搜索他/她的名字(以及其他名称,如有必要)。由于会有很多名称,“研究员”也应该在下拉列表旁边有一个搜索功能。

创建提交视图:

<div class="form-group">
            @Html.Label("Researchers", new { @class = "control-label col-md-2" })
            <div class="col-md-offset-2 col-md-10">
                        @{
                            int cnt = 0;
                            List<RMS.ViewModels.AssignedResearcherData> researchers = ViewBag.Researcher;

                            foreach (var researcher in researchers)
                            {
                                if (cnt++ % 3 == 0)
                                {
                                    @:</tr><tr>
                                }
                                @:<td>
                                    <input type="checkbox"
                                        name="selectedResearchers"
                                        value="@researcher.ResearcherID"
                                        @(Html.Raw(researcher.Assigned ? "checked=\"checked\"" : "")) />
                                        @researcher.FullName
                                @:</td>
                            }
                            @:</tr>
                        }
             </div>
        </div>

提交控制器:

private void PopulateAssignedResearcherData(Submission submission)
        {
            var allResearchers = db.Researcher;
            var submissionResearchers = new HashSet<int>(submission.Researcher.Select(i => i.ResearcherID));
            var viewModel = new List<AssignedResearcherData>();
            foreach (var researcher in allResearchers)
            {
                viewModel.Add(new AssignedResearcherData
                {
                    ResearcherID = researcher.ResearcherID,
                    FirstName = researcher.FirstName,
                    Surname = researcher.Surname,
                    Assigned = submissionResearchers.Contains(researcher.ResearcherID)
                });
            }
            ViewBag.Researcher = viewModel;
            // ViewBag.ResearcherSelect = new MultiSelectList(viewModel, "ResearcherID", "FullName");
        }

2 个答案:

答案 0 :(得分:1)

您可以使用Select2等第三方插件来实现可搜索的下拉列表 https://select2.github.io/

您只需要生成复选框,生成选择选项,然后调用select2:

//include library at top

<link href="//cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/css/select2.min.css" rel="stylesheet" />
<script src="//cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/js/select2.min.js"></script>

// init select2
<script type="text/javascript">
  $('#myDDl').select2();
</script>



// generate select instead of checkbox   
<select id="myDDl" name="selectedResearchers" multiple="multiple">
 @foreach (var researcher in researchers)
 {
  <option value="@researcher.ResearcherID" 
       @(Html.Raw(researcher.Assigned ? "checked=\"checked\"" : ""))>
      @researcher.FullName
  </option>
}
</select>

请务必结帐select2以获取您可以传入的更多选项 https://select2.github.io/examples.html

答案 1 :(得分:0)

阅读您的问题我不确定您是否在首先生成下拉框时遇到问题(但是您的第一句话看起来就像是这样)。好吧,如果您正在寻求帮助,那么基本上您需要做的就是将您的viewModel列表转换为C#中的MultipleSelectList,然后在Razor中生成下拉列表 -

C#

private void PopulateAssignedResearcherData(Submission submission)
    {
        var allResearchers = db.Researcher;
        var submissionResearchers = new HashSet<int>(submission.Researcher.Select(i => i.ResearcherID));
        var viewModel = new List<AssignedResearcherData>();
        foreach (var researcher in allResearchers)
        {
            viewModel.Add(new AssignedResearcherData
            {
                ResearcherID = researcher.ResearcherID,
                FirstName = researcher.FirstName,
                Surname = researcher.Surname,
                Fullname = researcher.FirstName + " " + researcher.Surname,
                Assigned = submissionResearchers.Contains(researcher.ResearcherID)
            });
        }
        ViewBag.Researcher = viewModel;
        ViewBag.ResearcherSelect = new MultiSelectList(viewModel, "ResearcherID", "FullName", viewModel.Where(rs => rs.Assigned);
    }

剃刀

<div class="form-group">
        @Html.Label("Researchers", new { @class = "control-label col-md-2" })
        <div class="col-md-offset-2 col-md-10">
                    @{
                        int cnt = 0;
                        List<RMS.ViewModels.AssignedResearcherData> researchers = ViewBag.Researcher;

                        foreach (var researcher in researchers)
                        {
                            if (cnt++ % 3 == 0)
                            {
                                @:</tr><tr>
                            }
                            @:<td>
                                @Html.TextBox("researcherSearch")
                                @Html.DropDownList("researcherList", ViewBag.ResearcherSelect)
                            @:</td>
                        }
                        @:</tr>
                    }
         </div>
    </div>

一旦完成,使用其他答案或jQuery UI的自动完成(http://jqueryui.com/autocomplete/)中的建议添加搜索功能应该相对简单。

如果你去了jQuery UI路线,我建议你可以将ViewBag.Researcher变量转换为JSON以用作数据源。