ASP.NET MVC5 Ajax窗體後置模型null？

Question

無論我提交表單，註釋對象只是有一個值Comment Object 但頁面看起來像這樣 Create Form
爲什麼不視圖模型值正確發佈？

public class CommentViewModel{ 

    public Comment comment { get; set; } 
    public UploadFile Uploadfile { get; set; } 
} 

這是評論類：

public class Comment{ 

    [Key] 
    public int Id { get; set; } 
    public int FileId { get; set; } 
    public DateTime CreateDate { get; set; } 
    public string review { get; set; } 
    public string UserId { get; set; } 
} 

這是查看：

@using (Ajax.BeginForm(ajaxopts)){ 

    @Html.AntiForgeryToken() 
    <h4>Comment</h4> 
    <hr /> 
    @Html.ValidationSummary(true, "", new { @class = "text-danger" }) 

    @Html.LabelFor(model => model.comment.FileId, htmlAttributes: new { @class = "control-label col-md-2" }) 

    <input class="form-control text-box single-line" data-val="true" data-val-number="The field FileId must be a number." data-val-required="FileId is necessary" id="FileId" name="FileId" type="number" value="@ViewBag.FileId" /> 

    @Html.LabelFor(model => model.comment.CreateDate, htmlAttributes: new { @class = "control-label col-md-2" }) 

    <input class="form-control text-box single-line" data-val="true" data-val-date="The field CreateDate must be a date." data-val-required="CreateDate is necessary" id="CreateDate" name="CreateDate" type="datetime" value="@DateTime.Now.ToString()" /> 

    @Html.LabelFor(model => model.comment.UserId, htmlAttributes: new { @class = "control-label col-md-2" }) 

    <input class="form-control text-box single-line" id="UserId" name="UserId" type="text" value="@User.Identity.Name.ToString()" /> 

    @Html.ValidationMessageFor(model => model.comment.UserId, "", new { @class = "text-danger" }) 

    @Html.LabelFor(model => model.comment.review, htmlAttributes: new { @class = "control-label col-md-2" }) 

    @Html.EditorFor(model => model.comment.review, new { htmlAttributes = new { @class = "form-control" } }) 

    <input type="submit" value="Create" class="btn btn-default" /> 
} 

這是控制器：

public ActionResult CreateCommets(Comment comment){ 

     if (ModelState.IsValid) 
     { 
      db.Comments.Add(comment); 
      db.SaveChanges(); 
     } 
     List<Comment> Commentlist = (from p in db.Comments where p.FileId == comment.FileId select p).ToList(); 
     return PartialView("_CommentsView",Commentlist); 
    } 

Answer 1

你試過HTML輔助類的輸入類型例如：

@Html.Textboxfor(m=>m.comment.CreateDate, new { @class="",@type="datetime",@value="@DateTime.Now.ToString()"}) 

Answer 2

對於Userid，CreateDate和FileID嘗試使用編輯器。您可以將您的自定義類by looking at this question

Answer 3

請更新您的視圖代碼....

@model ApplicationName.Models.Comment 

<h4>Comment</h4> 
<hr /> 
@Html.ValidationSummary(true, "", new { @class = "text-danger" }) 

@Html.LabelFor(model => model.FileId, htmlAttributes: new { @class = "control-label col-md-2" }) 

<input class="form-control text-box single-line" data-val="true" data-val-number="The field FileId must be a number." data-val-required="FileId is necessary" id="FileId" name="FileId" type="number" value="@ViewBag.FileId" /> 

@Html.LabelFor(model => model.CreateDate, htmlAttributes: new { @class = "control-label col-md-2" }) 

<input class="form-control text-box single-line" data-val="true" data-val-date="The field CreateDate must be a date." data-val-required="CreateDate is necessary" id="CreateDate" name="CreateDate" type="datetime" value="@DateTime.Now.ToString()" /> 

    @Html.LabelFor(model => model.UserId, htmlAttributes: new { @class = "control-label col-md-2" }) 

    <input class="form-control text-box single-line" id="UserId" name="UserId" type="text" value="@User.Identity.Name.ToString()" /> 

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

@Html.LabelFor(model => model.review, htmlAttributes: new { @class = "control-label col-md-2" }) 

@Html.EditorFor(model => model.review, new { htmlAttributes = new { @class = "form-control" } }) 

<input type="submit" value="Create" class="btn btn-default" />