让数据显示在我的视图中
让数据显示在我的视图中
提问于 2015-07-24 04:54:35
我有一个工作正常的模型和控制器，但是我的模型没有在视图中显示任何数据。你知道我做错了什么吗？
我有一个单一的模型，我试图传递其中的几个变量。
我正在尝试使用Html.ViewData.Model。(这里是变量名)。即使我在模型中有硬设置值，我仍然得到一个空异常。
有什么想法吗？
模型
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using Microsoft.AspNet.Identity;
using Microsoft.Owin.Security;
namespace stuff
{
public class BACnetModel
{
private string _rmNum = "Room Number";
public string RmNum { get { return _rmNum; } set{_rmNum = value;} }
private string _avRes = "70";
public string AvRes { get { return _avRes; } set {_avRes = value;} }
private string _bvRes = "T";
public string BvRes { get { return _bvRes; } set { _bvRes = value; } }
private string _mvRes = "O";
public string MvRes { get { return _mvRes; } set { _mvRes = value; } }
}
}控制器
public class PEOController : Controller
{
//Set default values
private string AvResult = "90";
private string BvResult = "T";
private string MvResult = "O";
private string rmNum = "Room";
// GET: PEO
public ActionResult PEO(string BvResult, string AvResult, string MvResult, string rmNum)
{
var model = new BACnetModel
{
AvRes = AvResult,
BvRes = BvResult,
MvRes = MvResult,
RmNum = rmNum
};
return View(model);
}
public ActionResult getRoomNumber(string roomNumber, ref uint BvInstance, ref uint AvInstance, ref uint MvInstance, out string rmNum)
{
switch (roomNumber)
{
case ("1B^1001^01"):
rmNum = "1B^1001^01";
BvInstance = 3000018;
AvInstance = 3000022;
MvInstance = 3000040;
break;
case ("1B^1002^01"):
rmNum = "1B^1002^01";
BvInstance = 3000020;
AvInstance = 3000023;
MvInstance = 3000042;
break;
default:
break;
}
rmNum = "Room";
var model = new BACnetModel
{
AvRes = AvResult,
BvRes = BvResult,
MvRes = MvResult,
RmNum = rmNum
};
return View(model);
}
}视图
@using Stuff
@using Microsoft.Ajax.Utilities
@model BACnetModel
@{
ViewBag.Title = "";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2> Stuff(PEO)</h2>
<p>
Stuff
</p>
<label>Select a Room: </label>
<!-- I need to add Code that will loop through the database and provide rooms.
I will need to provide a query that will be called on page load.-->
<form action="/PEO/getRoomNumber">
<select id="roomList">
<option value="1B^1001^01">1B^1001^01</option>
<option value="1B^1002^01">1B^1002^01</option>
</select><br/><br/>
<fieldset id="peoFieldset">
<legend>Room Results</legend>
<label for="roomNumber">Room Number:</label>
<input id="roomNumber" readonly="readonly"/>@Html.ViewData.Model.RmNum<br>
<label for="rmSetpoint">Room Setpoint: </label>
<input id="rmSetpoint" readonly="readonly" />@Html.ViewData.Model.AvRes<br>
<label for="rmCode">Room Code: </label>
<input id="rmCode" readonly="readonly" />@Html.ViewData.Model.BvRes<br>
<label for="rmOcc">Room Occupancy: </label>
<input id="rmOcc" readonly="readonly" />@Html.ViewData.Model.MvRes<br>
</fieldset>
</form>
<label>Occupancy Value</label>
<select id="occValue">
<option value="Occupied">Occupied</option>
<option value="Unoccupied">Unoccupied</option>
</select>回答 2
Stack Overflow用户
发布于 2015-07-24 05:55:28
我不确定您为什么要在视图中使用ViewData。而是使用标准的模型绑定。在您的视图中尝试以下代码：
<fieldset id="peoFieldset">
<legend>Room Results</legend>
<label for="roomNumber">Room Number:</label>
<input id="roomNumber" readonly="readonly"/>@Model.RmNum<br>
<label for="rmSetpoint">Room Setpoint: </label>
<input id="rmSetpoint" readonly="readonly" />@Model.AvRes<br>
<label for="rmCode">Room Code: </label>
<input id="rmCode" readonly="readonly" />@Model.BvRes<br>
<label for="rmOcc">Room Occupancy: </label>
<input id="rmOcc" readonly="readonly" />@Model.MvRes<br>
</fieldset>Stack Overflow用户
发布于 2015-07-24 20:32:07
我让它起作用了。
首先，我在任何方法之外的控制器中创建了模型的一个实例。
private BACnetModel model = new BACnetModel();完成此操作后，我设置了模型的值，并将它们作为Action方法的一部分返回。
public ActionResult PEO()
{
var Room1 =
new SelectListItem {Text = "1B^1001^01", Value = "1B^1001^01"};
var Room2 =
new SelectListItem {Text = "1B^1002^01", Value = "1B^1002^01"};
roomList.Add(Room1);
roomList.Add(Room2);
ViewBag.RoomList = new SelectList(roomList, "Text", "Value");
model.RmNum = "";
model.AvRes = "";
model.BvRes = "";
model.MvRes = "";
return View(model);
}然后，我转到我的视图并将Model值放入视图中。
<fieldset id="peoFieldset">
<legend>Room Results</legend>
<label for="roomNumber">Room Number:</label>
<input id="roomNumber" readonly="readonly" value="@Model.RmNum" /><br>
<label for="rmSetpoint">Room Setpoint: </label>
<input id="rmSetpoint" readonly="readonly" value="@Model.AvRes" /><br>
<label for="rmCode">Room Code: </label>
<input id="rmCode" readonly="readonly" value="@Model.BvRes" /><br>
<label for="rmOcc">Room Occupancy: </label>
<input id="rmOcc" readonly="readonly" value="@Model.MvRes" /><br>
</fieldset>就像一种护身符！
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/31597851
复制相关文章
相似问题
腾讯云开发者
