繁体   English   中英

MVC 4 Razor引擎HttpPostedFileBase无法使用创建强类型视图

[英]MVC 4 Razor Engine HttpPostedFileBase not working with Create a strongly-typed view

在我的MVC 4项目中,我使用“创建强类型视图”作为“脚手架模板:编辑”来创建视图。 但是在该页面中,我尝试使用文件上传方法上传图像,但是在控制器端,运行项目时,HttpPostedFileBase始终显示为null。

这是我的控制器:

    public ActionResult EditUser(int id)
    {
        if (Session["UserId"] != null)
        {
            return View(db.Users.FirstOrDefault(x => x.id == id));
        }
        else
        {
            return RedirectToAction("Login");
        }

    }

    [HttpPost]
    public ActionResult EditUser(User user, HttpPostedFileBase ProfileImage)
    {
        db.Entry(user).State = System.Data.EntityState.Modified;

        if (ProfileImage != null && ProfileImage.ContentLength > 0)
        {
            string filePath = Path.Combine(Server.MapPath("~/Content/img/user"), Path.GetFileName(ProfileImage.FileName));
            ProfileImage.SaveAs(filePath);
        }

        db.SaveChanges();
        return RedirectToAction("Profile");
    }

这是我的观点:

@model emirhanozkan.Models.User

@{
ViewBag.Title = "Edit User";
}

<h2>EditUser</h2>

@using (Html.BeginForm()) {
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)

<fieldset>
    <legend>@ViewBag.Title</legend>

    @Html.HiddenFor(model => model.id)

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

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

    <div class="editor-label">
        @Html.LabelFor(model => model.ProfileImage)
    </div>

    <div class="editor-field">
        @Html.TextBoxFor(model => model.ProfileImage, new { type = "file", enctype = "multipart/form-data" })
        @Html.ValidationMessageFor(model => model.ProfileImage)

    </div>
    <p>
        <input type="submit" value="Save" />
    </p>
</fieldset>
}

在输入文件系统中,将名称获取为ProfileImage。

这是我的模特:

namespace emirhanozkan.Models
{
public partial class User
{
    [Key]
    public int id { get; set; }

    [Required(ErrorMessage = "Lütfen bir kullanıcı adı belirleyiniz.")]
    public string Username { get; set; }

    [Required(ErrorMessage = "Lütfen email adresinizi giriniz.")]
    [RegularExpression(@"^([\w-\.]+)@((\[[0-9]{1,3]\.)|(([\w-]+\.)+))([a-zA-Z{2,4}|[0-9]{1,3})(\]?)$", ErrorMessage = "Lütfen geçerli bir email adresi giriniz.")]
    public string Email { get; set; }

    public string ProfileImage { get; set; }
}
}

@Html.TextBoxFor(model => model.ProfileImage, new { type = "file", enctype = "multipart/form-data" })是我的选择,我不知道有没有这样的方法,但是我尝试过使用@using (Html.BeginForm(null, null, FormMethod.Post, new { enctype = "multipart/form-data" })){<input type="file" />}代替我的代码,但是没有也可以。

您对在MVC 4上的“创建强类型视图”中如何使用HttpPostedFileBase有任何想法吗?

您必须在beginform中指定enctype multipart,例如

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

}

在这里,我们使用Html.BeginForm发送“ multipart / form-data ”,基本上,每当您向控制器发送文件时,都需要提及它:

该代码将为您工作:

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

     }

干杯!

暂无
暂无

声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM