控制器中的 Asp.Net MVC 5 ModelState 具有索引、添加、编辑

Posted 2023-02-24

【中文标题】控制器中的 Asp.Net MVC 5 ModelState 具有索引、添加、编辑

【英文标题】：Asp.Net MVC 5 ModelState in a controller with index, add, edit

【发布时间】：2021-09-29 14:58:03

【问题描述】：

我在使用 ModelState 时遇到问题。 我使用控制器来显示列表、编辑和创建元素。 我使用局部视图进行创建和编辑。在索引视图上

我的索引视图使用视图模型（包含我的模型和所选模型的列表） 我的问题是我想在部分视图中显示验证错误。

你能帮我在我的保存功能上添加这个模型状态吗？

RecordersViewModel.cs

public class RecordersViewModel

    public List<MapRecorders> Recorders  get; set; 
    public MapRecorders SelectedRecorder  get; set; 
    public string DisplayMode  get; set; 

MapRecorders（表数据库）

public partial class MapRecorders

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public MapRecorders()
    
        this.Timers = new HashSet<Timers>();
    
    [Key]
    [Display(Name = "Id")]
    public int MapRecordersID  get; set; 
    
    [Display(Name = "Nom")]
    [Required(ErrorMessage = "Le nom est obligatoire.")]
    public string Name  get; set; 

recordersController.cs

public ActionResult Index()

    using (ScheduleRecDBEntities db = new ScheduleRecDBEntities())
    
        List<MapRecordingtypes> recodersTypesModel = db.MapRecordingtypes.ToList();
        ViewData["RecordingTypeList"] = recodersTypesModel.Select(x => new SelectListItem  Value = x.MapRecordingtypesID.ToString(), Text = x.Name );

        RecordersViewModel model = new RecordersViewModel();
        model.Recorders = db.MapRecorders.OrderBy(m => m.MapRecordersID).ToList();
        model.SelectedRecorder = null;
        return View(model);
    

[HttpPost]
public ActionResult Add()

    using (ScheduleRecDBEntities db = new ScheduleRecDBEntities())
    
        List<MapRecordingtypes> recodersTypesModel = db.MapRecordingtypes.ToList();
        ViewData["RecordingTypeList"] = recodersTypesModel.Select(x => new SelectListItem  Value = x.MapRecordingtypesID.ToString(), Text = x.Name );

        RecordersViewModel model = new RecordersViewModel();
        model.Recorders = db.MapRecorders.OrderBy(
            m => m.MapRecordersID).ToList();
        model.SelectedRecorder = null;
        model.DisplayMode = "WriteOnly";
        return View("Index", model);
    

[HttpPost]
public ActionResult Edit(int id)

    using (ScheduleRecDBEntities db = new ScheduleRecDBEntities())
    
        List<MapRecordingtypes> recodersTypesModel = db.MapRecordingtypes.ToList();
        ViewData["RecordingTypeList"] = recodersTypesModel.Select(x => new SelectListItem  Value = x.MapRecordingtypesID.ToString(), Text = x.Name );

        RecordersViewModel model = new RecordersViewModel();
        model.Recorders = db.MapRecorders.OrderBy(
            m => m.MapRecordersID).ToList();
        model.SelectedRecorder = db.MapRecorders.Find(id);
        model.DisplayMode = "ReadWrite";
        return View("Index", model);
    

[HttpPost]
public ActionResult Save(MapRecorders obj)

    using (ScheduleRecDBEntities db = new ScheduleRecDBEntities())
    
        MapRecorders existing = db.MapRecorders.Find(obj.MapRecordersID);

        if (existing == null)
        
            obj.Active =
                Convert.ToByte(Request.Form["Active"]
                    .ToString()); //Request.Form["Active"].ToString() == "false" ? 0 : 1;
            db.MapRecorders.Add(obj);
        
        else
        
            existing.Name = obj.Name;
            existing.Link = obj.Link;
            existing.LinkBackup = obj.LinkBackup;
            existing.MapRecordingTypesID = obj.MapRecordingTypesID;
            existing.Active =
                Convert.ToByte(Request.Form["Active"]
                    .ToString()); //Request.Form["Active"].ToString() == "false" ? 0 : 1;
        

        db.SaveChanges();

        RecordersViewModel model = new RecordersViewModel();
        model.Recorders = db.MapRecorders.OrderBy(
            m => m.MapRecordersID).ToList();
        return RedirectToAction("Index", "Recorders");
    

index.cshtml

@model ScheduleRecordings.Models.RecordersViewModel

@
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";


<div class="row">
    <div class="col-lg-12 col-sm-12 float-left btn-list titlebar">
        <h1>Liste des décodeurs</h1>
        <form method="post">
            <input class="btn btn-default" type="submit"
                   value="Ajouter" formaction="/Recorders/Add" />
        </form>
    </div>
    <div class="col-lg-6 col-sm-12 float-left" style="margin-bottom: 15px;">
        <form method="post">
            <table class="table-list" border="1" cellpadding="10">
                <tr>
                    <th>@Html.LabelFor(m => m.SelectedRecorder.MapRecordersID)</th>
                    <th>@Html.LabelFor(m => m.SelectedRecorder.Name)</th>
                    <th>@Html.LabelFor(m => m.SelectedRecorder.Link)</th>
                    <th>@Html.LabelFor(m => m.SelectedRecorder.LinkBackup)</th>
                    <th>@Html.LabelFor(m => m.SelectedRecorder.MapRecordingtypes.Name)</th>
                    <th>@Html.LabelFor(m => m.SelectedRecorder.Active)</th>
                    <th></th>
                </tr>
                @foreach (var item in Model.Recorders)
                
                    if (Model.SelectedRecorder != null)
                    
                        if (item.MapRecordersID ==
                            Model.SelectedRecorder.MapRecordersID)
                        
                            @:<tr class="SelectedRecorder">
                            
                            else
                            
                                @:<tr>
                            
                        
                        else
                        
                            @:<tr>
                                
                                <td>@item.MapRecordersID</td>
                                <td>@item.Name</td>
                                <td><a target="_blank" href="http://@item.Link">@item.Link</a></td>
                                <td><a target="_blank"  href="http://@item.LinkBackup">@item.LinkBackup</a></td>
                                <td>@item.MapRecordingtypes.Name</td>
                                <td>@Html.CheckBox("Active_" + @item.MapRecordersID.ToString(), Convert.ToBoolean(@item.Active), new  @disabled = "disabled" )</td>
                                <td>
                                    <input type="submit"
                                           formaction="/Recorders/Edit/@item.MapRecordersID"
                                           value="Editer" />
                                </td>
                                @:</tr>
                
            </table>
        </form>
    </div>

    <div class="col-lg-6 col-sm-12 float-left">
        @
            if (Model.SelectedRecorder != null)
            
                if (Model.DisplayMode == "ReadOnly")
                
                    Html.RenderPartial
                    ("ShowRecorder", Model.SelectedRecorder);
                
                if (Model.DisplayMode == "ReadWrite")
                
                    Html.RenderPartial
                    ("EditRecorder", Model.SelectedRecorder);
                
            
            if (Model.DisplayMode == "WriteOnly")
            
                Html.RenderPartial("InsertRecorder",
                new ScheduleRecordings.Models.MapRecorders());
            
        
    </div>
</div>

InsertRecorder.cshtml

@using ScheduleRecordings.Models
@model ScheduleRecordings.Models.MapRecorders

@using (Html.BeginForm("Insert", "Recorders", FormMethod.Post))

    <table class="table-info" border="1" cellpadding="10">
        <tr>
            <td colspan="2">
                <span>Ajouter</span>
            </td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.Name)</td>
            <td>@Html.TextBoxFor(m => m.Name, new  @autofocus = "autofocus" )</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.Link)</td>
            <td>@Html.TextBoxFor(m => m.Link)</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.LinkBackup)</td>
            <td>@Html.TextBoxFor(m => m.LinkBackup)</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.MapRecordingtypes.Name)</td>
            <td>@Html.DropDownListFor(m => m.MapRecordingTypesID, (IEnumerable<SelectListItem>)ViewData["RecordingTypeList"], "[Type]", new  @class = "form-control" )</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.Active)</td>
            <td>@Html.CheckBox("Active", Convert.ToBoolean(Model.Active))</td>
        </tr>
        <tr>
            <td colspan="2">
                <input type="submit" value="Sauvegarder"
                       formaction="/Recorders/Save" />
                <input type="submit" value="Annuler"
                       formaction="/Recorders" />
            </td>
        </tr>
    </table>
    <div>
        @Html.ValidationMessageFor(m => m.Name, "", new  @class = "text-danger" )
        @Html.ValidationMessageFor(m => m.Link, "", new  @class = "text-danger" )
        @Html.ValidationMessageFor(m => m.LinkBackup, "", new  @class = "text-danger" )
    </div>

【问题讨论】：

嘿，你能不能详细说明你的问题。

我想检查模型是否在我的保存功能上验证。之后，我想返回带有部分视图和错误消息的索引视图

【参考方案1】：

根据我对问题的理解：

1:) 在保存方法中使用 ModeState.IsValid 属性。为此只需使用

 If(ModelState.IsValid)
 
   //Save Code

    else

   //Do Something

2:) 您需要将验证消息添加到您的 ViewModel 中，并且还需要将验证消息帮助器方法添加到部分视图。就像在给定的参考中显示错误消息一样。

链接：-https://forums.asp.net/post/6080694.aspx

编辑 将这种类型的验证添加到您的 ViewModel

[StringLength(2000, ErrorMessage = "The Description Can Not Exceed 2000 Characters")]

并在部分视图中添加这种类型的验证辅助方法

@Html.ValidationMessageFor(model => model.DisplayMode, "", new  @class = "text-danger" )

【讨论】：

你能告诉我这一点“向你的 ViewModel 添加验证消息”吗？

这回答了你的问题吗？

我现在尝试但是它只是用于知道我是否显示插入部分视图或编辑部分视图的 displayMode...但是如何显示对象每个字段的错误...跨度>

您可以检查数据注释，以便验证模型中不同类型的数据和对象。此外，您可以创建自己的模型状态错误，以防您想要执行特殊类型的验证。

【参考方案2】：

我找到了我的解决方案。

我只是忘了调用validation.js 脚本...

@Scripts.Render("~/bundles/jqueryval")