Model is null while submitting the form in partial view in MVC5

问题

I am just trying to learn MVC and facing some issues.When I am submitting my partial view, I am getting null in Model Blog inside Create Method.

What I am doing wrong and what is the right approach?

View(Index.cshtml)

@model IEnumerable<Samples.Controllers.Blog>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table class="table">
    <tr>
        <th>Sample</th>
        <th>URL</th>
        <th>Name</th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) |
            @Html.ActionLink("Details", "Details", new { /* id=item.PrimaryKey */ }) |
            @Html.ActionLink("Delete", "Delete", new { /* id=item.PrimaryKey */ })
        </td>
        <td>
            @item.URL
        </td>
        <td>
            @item.Name
        </td>
    </tr>
}

</table>

@Html.Partial("_CreateBlog", new Samples.Controllers.Blog())

Partial View(_CreateBlog.cshtml)

@model Samples.Controllers.Blog

@using (Html.BeginForm("Create","Sample",FormMethod.Post)) 
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h4>Blog</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="row">
            @Html.LabelFor(model => model.URL)
            @Html.EditorFor(model => model.URL)
        </div>
        <div class="row">
            @Html.LabelFor(model => model.Name)
            @Html.EditorFor(model => model.Name)
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

SampleController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Samples.Controllers
{
    public class SampleController : Controller
    {
        List<Blog> lstBlogs;
        public SampleController() 
        {
            lstBlogs = new List<Blog> 
           {
               new  Blog{ Name="Domnic", URL=   "www.google.com"},
               new  Blog{ Name="Tom", URL=   "www.YAHOO.com"},
               new  Blog{ Name="Cat", URL=   "www.facebook.com"},
               new  Blog{ Name="Bob", URL=   "www.twitter.com"}
           };
        }
        // GET: Sample
        public ActionResult Index()
        {
            return View(lstBlogs);
        }
        public ActionResult IndexWithDynamicView()
        {
            return View(lstBlogs);
        }

        [HttpPost]
        public void Create(Blog blog)
        { 

        }
    }
    public class Blog
    {
        public string Name;
        public string URL;
    }

}

回答1:

Your class Blog only contains fields, not properties so the DefaultModelBinder cannot set their values. Change it add getters/setters

public class Blog
{
    public string Name { get; set; }
    public string URL { get; set; }
}

回答2:

Maybe this answer relates to your question: Is there a reason why the default modelbinder doesn't bind to fields?

Pay attention at DefaultModelBinder, ModelBinderContext, ModelMetadata. This explains it all.

来源：https://stackoverflow.com/questions/32449325/model-is-null-while-submitting-the-form-in-partial-view-in-mvc5