如何将隐藏字段值从视图传递到控制器ASP.NET MVC 5

use*_*878 6 c# asp.net-mvc entity-framework

我正在尝试通过执行以下操作将隐藏字段值从视图传递到控制器

@Html.HiddenFor(model => model.Articles.ArticleId) 
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并尝试了

<input type="hidden" id="ArticleId" name="ArticleId" value="@Model.Articles.ArticleId" />
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在这两种情况下,ArticleId的值均为0,但是当我使用TextboxFor时,我可以看到正确的ArticleId,请帮助

这里是

视图

@model ArticlesCommentsViewModel
....
@using (Html.BeginForm("Create", "Comments", FormMethod.Post))
{
<div class="row">
    <div class="col-xs-10 col-md-10 col-sm-10">
        <div class="form-group">
            @Html.LabelFor(model => model.Comments.Comment, new { @class = "control-label" })
            @Html.TextAreaFor(m => m.Comments.Comment, new { @class = "ckeditor" })
            @Html.ValidationMessageFor(m => m.Comments.Comment, null, new { @class = "text-danger"})
        </div>
    </div>
</div>

<div class="row">

        @*@Html.HiddenFor(model => model.Articles.ArticleId)*@
    <input type="hidden" id="ArticleId" name="ArticleId" value="@Model.Articles.ArticleId" />
</div>

<div class="row">
    <div class="col-xs-4 col-md-4 col-sm-4">
        <div class="form-group">
            <input type="submit" value="Post Comment" class="btn btn-primary" />
        </div>
    </div>
</div>
}
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控制者

    // POST: Comments/Create
    [HttpPost]
    public ActionResult Create(CommentsViewModel comments)//, int ArticleId)
    {
        var comment = new Comments
        {
            Comment = Server.HtmlEncode(comments.Comment),
            ArticleId = comments.ArticleId,
            CommentByUserId = User.Identity.GetUserId()
        };
    }
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模型

public class CommentsViewModel
{
    [Required(ErrorMessage = "Comment is required")]
    [DataType(DataType.MultilineText)]
    [Display(Name = "Comment")]
    [AllowHtml]
    public string Comment { get; set; }

    public int ArticleId { get; set; }
}
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视图模型

public class ArticlesCommentsViewModel
{
    public Articles Articles { get; set; }
    public CommentsViewModel Comments { get; set; }
}
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小智 5

视图中的模型是ArticlesCommentsViewModel如此,因此POST方法中的参数必须匹配。您的使用

@Html.HiddenFor(model => model.Articles.ArticleId)
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是正确的,但是您需要将方法更改为

[HttpPost]
public ActionResult Create(ArticlesCommentsViewModel model)
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并且模型将被正确绑定。

附带说明,您ArticlesCommentsViewModel不应包含数据模型,而应仅包含视图中所需的那些属性。如果typeof Articles包含具有验证属性的属性,则ModelState该属性将无效,因为您没有发布的所有属性Article

但是,由于CommentsViewModel已经包含的属性ArticleId,因此您可以使用

@Html.HiddenFor(model => model.Comments.ArticleId)
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并在POST方法中

[HttpPost]
public ActionResult Create([Bind(Prefix="Comments")]CommentsViewModel model)
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有效地去除“ Comments”前缀