修改了ASP.NET MVC的一堆代码，到处都是至少500行代码的示例。
这里有Plane目录的列表（key.plane键）。当前有一个InstanceC条目（链接到InstanceC.ID_plane目录）
从加载列表的控制器中设置值并由用户读取所选值有多容易？
我有以下代码：
AccountController.cs
public ActionResult ClickDetails(String slctplane, String Description,String SaveInstance, string AddInstance, string ActivePlane, string RestartInstance, string GeneratePassword, string ResetDB, String DelInstance)
{
if (ActivePlane != null)
{
String id_plane = slctplane; // Выбранный тарифный план
}
}
模型类：
public class Plane
{
[Key]
public int key_plane { get; set; }
public String Name_plane { get; set; }
public int Num_users { get; set; }
public int Size_db { get; set; }
public int Freq_in_minute { get; set; }
public int Price_usd { get; set; }
public int Price_r { get; set; }
}
public class InstanceC
{
[Key]
public int key_Instance { get; set; }
public String ID_user { get; set; }
public int ID_Server { get; set; }
public String Login_inst { get; set; }
public String Password_inst { get; set; }
public int SetStatusForBroker { get; set; }
public String Description { get; set; }
public int ID_plane { get; set; }
public String Name_plane { get; set; }
public int Price_usd { get; set; }
public int Price_r { get; set; }
public int Num_users { get; set; }
public int RealStatus { get; set; }
public String Name_server { get; set; }
public String Name_domain { get; set; }
}
我在Details.cshtml中有以下标记：
@{
ViewBag.Title = "Подробнее/";
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
</head>
<body>
@using (Html.BeginForm("ClickDetails", "Account", FormMethod.Post))
{
<div>
<h2>Подробнее</h2>
<div class="cloud-box">
<div class="row">
<div class="col-md-12">
<h3>Информация о инстанции</h3>
</div>
</div>
@foreach (var i in ViewBag.Details)
{
<div class="row">
<div class="col-md-8">
<table class="table cloud-data">
<tbody>
<tr>
<td>Название</td>
<td>
<input name="Description" type="text" value="@i.Description" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-sm">
<button name="SaveInstance" value="@i.key_Instance" type="submit" class="btn btn-success btn-sm pull-right">
<i class="glyphicon glyphicon-floppy-saved"></i>
Сохранить
</button>
<button name="DelInstance" value="@i.key_Instance" type="submit" class="btn btn-danger btn-sm pull-right">
<i class="glyphicon glyphicon-floppy-saved"></i>
Удалить
</button>
</td>
</tr>
<tr>
<td>Тарифный план</td>
<td>
<button type="button" value="" class="btn btn-success btn-sm pull-right" data-toggle="modal" data-target="#ActivePlaneDlg">
<i class="glyphicon glyphicon-usd"></i>
Активировать
</button>
<div class="modal fade" id="ActivePlaneDlg" tabindex="-1" role="dialog" aria-labelledby="ActivePlaneTitle" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="ActivePlaneTitle">Активация тарифного плана</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
Старый тарифный план будет аннулирован.
Активировать и оплатить новый тарифный план?
</div>
<div class="modal-footer">
<button class="btn btn-secondary" id="ActivePlane" name="ActivePlane" value="id_plane=1">
<i class="glyphicon glyphicon-usd"></i>
Да
</button>
<!--
<input type="submit" name="ActivePlane" value="Сохранить" />
<button type="button" class="btn btn-secondary" data-dismiss="modal">Да</button> -->
<button type="button" class="btn btn-primary" data-dismiss="modal">Нет</button>
</div>
</div>
</div>
</div>
</tr>
<tr>
<td>Статус тарифного плана</td>
<td>
<font color="green">Активирован</font>
</td>
</tr>
<tr>
<td>Дата продления</td>
<td>01.01.2019</td>
</tr>
<tr>
<td>Автопродление</td>
<td>Активировано</td>
</tr>
<tr>
<td>Сервер</td>
<td>@i.Name_domain</td>
</tr>
<tr>
<td>Пользователь</td>
<td>
@i.Login_inst
<button type="button" class="btn btn-cloud btn-cloud-danger btn-sm pull-right" data-toggle="modal" data-target="#RebootInstanceDlg">
<i class="glyphicon glyphicon-repeat"></i>
Перезапуск
</button>
<div class="modal fade" id="RebootInstanceDlg" tabindex="-1" role="dialog" aria-labelledby="RebootInstanceTitle" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="RebootInstanceTitle">Перезагрузка</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
Вы уверены, что хотите перезагрузить инстанс?
</div>
<div class="modal-footer">
<!-- <button type="button" name="RestartInstance" class="btn btn-secondary" data-dismiss="modal">Да</button>
<input type="submit" name="RestartInstance" value="Да" />-->
<button class="btn btn-secondary" id="RestartInstance" name="RestartInstance" value="id_instance=1">
<i class="glyphicon glyphicon-repeat"></i>
Да
</button>
<button type="button" class="btn btn-primary" data-dismiss="modal">Нет</button>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr>
<td>
Пароль
</td>
<td>
@i.Password_inst
<button type="button" class="btn btn-cloud btn-cloud-danger btn-sm pull-right" data-toggle="modal" data-target="#ResetPasswordInstanceDlg">
<i class="glyphicon glyphicon-refresh"></i>
Сгенерировать
</button>
<div class="modal fade" id="ResetPasswordInstanceDlg" tabindex="-1" role="dialog" aria-labelledby="ResetPasswordInstanceTitle" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="ResetPasswordInstanceTitle">Генерация нового пароля</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
Сгенерировать новый пароль?
</div>
<div class="modal-footer">
<button class="btn btn-secondary" id="GeneratePassword" name="GeneratePassword" value="id_plane=2">
<i class="glyphicon glyphicon-refresh"></i>
Да
</button>
<!-- <button type="button" id="GeneratePassword" class="btn btn-secondary" value="id_psw=1" name="GeneratePassword" data-dismiss="modal">Да</button> -->
<!--<input type="submit" name="GeneratePassword" value="Да" />-->
<!--
<button class="btn btn-danger" id="resetdb" name="ResetDB" value="id_plane=1">
<i class="glyphicon glyphicon-trash"></i>
Сброс БД
</button>
>-->
<button type="button" class="btn btn-primary" data-dismiss="modal">Нет</button>
</div>
</div>
</div>
</div>
</td>
</tr>
<!----------------------------Начало: Список доступных портов---------------------------------------------------->
@foreach (var a in ViewBag.PortsDetail)
{
<tr>
<td>Протокол</td>
<td>
@a.NamePort
</td>
</tr>
<tr>
<td>Порт №</td>
<td>
@a.NumPort
</td>
</tr>
<hr>
}
<!---------------------------Конец: Список доступных портов------------------------------------------------------>
</tbody>
</table>
</div>
</div>
<hr>
<div class="row">
<div class="col-md-12">
<h3>Сброс БД</h3>
</div>
<div class="col-md-10">
Это сотрет все сохраненные сообщения в БД.
</div>
<div class="col-md-2">
<form action="https://*/console/9751325/details/reset" class="pull-right" id="reset-form" method="post">
<button class="btn btn-danger" id="resetdb" name="ResetDB" value="id_plane=1">
<i class="glyphicon glyphicon-trash"></i>
Сброс БД
</button>
</form>
</div>
</div>
<hr>
<div class="row">
<div class="col-md-12">
<h3>API</h3>
</div>
</div>
<div class="row">
<div class="col-sm-2">
<strong>API ключ</strong>
</div>
<div class="col-sm-10">
<code>0942387c-de7c-4241-2349da3-e59e4c1afdf6</code>
</div>
</div>
}
</div>
</div>
}
</body>
</html>
答案 0 :(得分：0)
您可以使用Model进行表单。这样，您就可以在控制器中设置默认值，并通过POST表单进行处理。
您的视图模型
class PlaneFormModel
{
public string slctplane { get; set; }
public string Description { get; set; }
public string SaveInstance { get; set; }
public string AddInstance { get; set; }
public string ActivePlane { get; set; }
public string RestartInstance { get; set; }
public string GeneratePassword { get; set; }
public string ResetDB { get; set; }
public string DelInstance { get; set; }
public string DropDownValueSelected { get; set; }
public string List<SelectListItem> DropDownValues { get; set; }
}
您的HttpGet控制器方法
[HttpGet]
public ActionResult ClickDetails()
{
// set view model with dropdown values, also you can use linq from your list of values
// also you can set default value for dropdown
var formModel = new PlaneFormModel
{
DropDownValueSelected = "defaultValue", // <---- value
DropDownValues = new List<SelectListItem>
{
new SelectListItem
{
Key = "key",
Value = "val"
}
}
};
return View(formMmodel);
}
您的HttpPost控制器方法
[HttpPost]
public ActionResult ClickDetails(PlaneFormModel formModel)
{
// bind model from form also you can use FormCollection instead.
if (!string.IsNullOrEmpty(formModel.DropDownValueSelected))
{
...
}
...
}
在视图中只需使用剃刀模板助手
@Html.DropDownListFor(m => m.DropDownValueSelected,
Model.DropDownValues,
"Select plane")
答案 1 :(得分：0)
这是您的操作方式：
public class TheModel
{
//Can be string, int, Guid, etc. Usually this is the index key.
public int SelectedValue {get;set;}
public List<SelectListItem> TheList {get;set;}
public TheModel()
{
TheList = new List<SelectListItem>();
}
}
例如，您有一个带有int类型索引键的模型。您可以从数据库中获取它，并将其插入列表中。
TheModel model = new TheModel();
using(MigrationDB db = new MigrationDB())
{
model.TheList = db.Plane.Select(m => new SelectListItem()
{
Value = m.PlaneId.ToString(), //Value can hold only string
Text = m.PlaneName //this is the <option>text</option>
}.ToList();
}
这是在Razor视图中编写它的方式：
@model TheModel
.....
<form> //You can use Html.BeginForm() to create the form tag.
@Html.DropDownListFor(m => m.SelectedValue, //This will bind the selected option into `SelectedValue` property
Model.TheList, //This will fill up your <option> with the value from the list.
" Select Plane ", //If no value is selected this option will be selected with the value null
new { @class = "custom-class", ...} //Html attribute you want to put here.
);
</form>
因此，如果您从下拉框中选择一个选项，则该选项将绑定到SelectedValue属性。
[HttpPost]
public ActionResult PassTheValue(TheModel model) //Pass the entire model
{
var theSelectedValue = model.SelectedValue;
...
}
您应该将整个模型从“ HTML”页面视图传递到控制器中。
对Html.BeginForm() source