Question

我无法使用下面的简单代码获取下拉列表中的选定值 -

<select class="form-control" id="team-name" name="gameTypes">
    @{long selectedOption = @ViewBag.HomeTeamId;}                                  
    @foreach (var item in Model.teams)
    {
        <option value="@item.TeamId" data-logo="@item.LogoURL" selected="@(selectedOption == @item.TeamId ? "selected" : "")">@item.FullName</option>
    }
</select>

Answer 1

我会这样做：

编写您的方法以在List<SelectListItem>中获取所需的团队，然后在您的控制器中将值放入ViewBag（ViewBag.Teams = GetTeams();）

例如：

[NonAction]
private List<SelectListItem> GetTeams()
{
   IEnumerable<Team> teams = new List<Team>();

   //fill the teams here from the DB

   return teams.Select(team => new SelectListItem
     {
       Text = team.TeamName, //here you can select the property that you want to show as text in the dropdown
       Value = team.ID.ToString()
     }).ToList();
}

在您看来，检索

@{
    List<SelectListItem> teams = ViewBag.Teams as List<SelectListItem>;
}

这里定义你的下拉列表并将团队作为数据源传递：

<div class="col-md-6 form-group">
 @Html.LabelFor(model => model.TeamId, htmlAttributes: new { @class = "control-label" })

 @Html.DropDownListFor(model => model.TeamId, teams, "Select a team", new { @class = "form-control" })
 @Html.ValidationMessageFor(model => model.TeamId, "", new { @class = "text-danger" })
</div>

选定的选项不适用于MVC Razor View

1 个答案: