Question

我在MVC 3创建页面中有一个下拉列表，但是当我发布页面时，我没有得到任何值。我的代码如下： -

查看： -

@using (Html.BeginForm("Create", "League", FormMethod.Post, new { enctype = "multipart/form-data" }))

{ @ Html.ValidationSummary（真）联赛

    <div class="editor-label">
        @Html.LabelFor(model => model.League.fk_CountryID, "Country")
    </div>
    <div class="editor-field">
        @Html.DropDownList("fk_CountryID", "--Select One--")                                               *              
        @Html.ValidationMessageFor(model => model.League.fk_CountryID)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.League.LeagueName)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.League.LeagueName)
        @Html.ValidationMessageFor(model => model.League.LeagueName)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.League.Image)
    </div>
    <div class="editor-field">
        Upload File: <input type="file" name="Image" />
    </div>


    <p>
        <input type="submit" value="Create" />
    </p>
</fieldset>

}

控制器： -

        [HttpPost]
    public ActionResult Create([Bind(Exclude = "Image")]Country country, HttpPostedFileBase Image, League league)
    {
        if (ModelState.IsValid)
        {

            model.League = league;

            try
            {
                foreach (string file in Request.Files)
                {
                    HttpPostedFileBase fileUploaded = Request.Files[file];

                    if (fileUploaded.ContentLength > 0)
                    {
                        byte[] imageSize = new byte[fileUploaded.ContentLength];
                        fileUploaded.InputStream.Read(imageSize, 0, (int)fileUploaded.ContentLength);
                        model.League.Image = imageSize;
                    }
                }

                db.Leagues.AddObject(model.League);
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            catch (Exception e)
            {
                ModelState.AddModelError("uploadError", e);
            }
        }

我做错了什么？无法获取控制器中的下拉列表值。

感谢您的帮助和时间

Answer 1

确定通过在我的ViewModel中添加SelectList来修复它，如下所示： -

        //Countries dropdown List
    public SelectList CountryList { get; set; }
    public string SelectedCountry { get; set; }

        public LeagueData PopulateCountriesDDL(string selected, Country country)
    {
        var typeList = new SelectList(db.Countries.ToList(), "CountryID", "CountryName", selected);
        LeagueData model = new LeagueData { CountryList = typeList, Country = country, SelectedCountry = selected };

        return model;
    }

MVC 3下拉列表没有获得任何值

1 个答案: