Question

我这里有问题。当我从我的BeginForm中删除（“Creae”，“DriverRegs”，FormMethod.Post，new {enctype =“multipart / form-data”}）时，图像路径通常存储在数据库中，但是当我把上面的内容放回到BeginForm，然后图像文件存储在我的文件夹中，但是在数据库上出现此错误 System.Web.HttpPostedFileWrapper 。这些代码有什么问题？如果有人可以帮助我，我会感激。提前谢谢。

这是我的代码：

CONTROLLER

public ActionResult Create(DriverReg model, HttpPostedFileBase file)
        {
            if (ModelState.IsValid)
            {
                if (file != null && file.ContentLength > 0)
                {
                    var fileName = Path.GetFileName(file.FileName);
                    var phisicalPath = Path.Combine(Server.MapPath("~/Content/uploads/"), fileName);
                    file.SaveAs(phisicalPath);
                    DriverReg newRecord = new DriverReg();
                    newRecord.FullName = model.FullName;
                    newRecord.Address = model.Address;
                    newRecord.Postcode = model.Postcode;
                    newRecord.Contact = model.Contact;
                    newRecord.Email = model.Email;
                    newRecord.County = model.County;
                    newRecord.File = phisicalPath;
                }
                db.DriverRegs.Add(model);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(model);
        }

MODEL

 public class DriverReg
    {
        [Key]
        public int DrvId { get; set; }
        public string FullName { get; set; }
        public string Address { get; set; }
        public string Postcode { get; set; }
        public string Contact { get; set; }
        public string Email { get; set; }
        public string County { get; set; }
        [DataType(DataType.Upload)]
        [Display(Name = "Upload Files")]
        [Required(ErrorMessage = "Please choose file to upload")]
        public string File { get; set; }
        public DateTime Date { get; set; }


        internal int UploadImageInDataBase(HttpPostedFileBase file, DriverRegViewModel model)
        {
            throw new NotImplementedException();
        }

    }
    public class DriverDbContext : DbContext
    {
        public DriverDbContext()
            : base("VanRemovals")
        {
        }

    public static DriverDbContext Create()
        {
            return new DriverDbContext();
        } 

          public DbSet<DriverReg> DriverRegs { get; set; }
    }

查看

@using（Html.BeginForm（“Create”，“DriverRegs”，FormMethod.Post，new {enctype =“multipart / form-data”}）） { @ Html.AntiForgeryToken（）

    <div class="form-horizontal">
        <h4>DriverReg</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.FullName, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.FullName, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.FullName, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Address, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Address, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Address, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Postcode, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Postcode, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Postcode, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Contact, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Contact, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Contact, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Email, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Email, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Email, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.County, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.County, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.County, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.File, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                <input type="file" class="file-input" name="file" />
                @Html.ValidationMessageFor(model => model.File, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Date, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Date, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Date, "", new { @class = "text-danger" })
            </div>
        </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>

Answer 1

这是一个让你烦恼的小细节，所以按照评论

进行更改

  db.DriverRegs.Add(newRecord);//change this part
                db.SaveChanges();

修改

首先，我不知道当你删除它时它是如何工作的，但是你要保存的不是DriveReg model，因为这就是你正在做的事情。相反，您想要保存DriverReg newRecord

当表单发布到控制器时，它会将文件发布为 System.Web.HttpPostedFileWrapper ，因此如果您保存DriverReg model，那就是您在数据库。那时你还没有完成一些逻辑来获得你phisicalPath所展示的DriverReg newRecord。由于newRecord和model属于同一类型DriverReg，因此您看起来好像保存了正确的数据，但事实并非如此。

System.Web.HttpPostedFileWrapper在MVC C＃中将图像上传到数据库时出错

1 个答案: