問題描述

離開 mvc3，我越來越瘦了.我的控制器中有以下代碼

I'm growing thin learving mvc3. I have the following code in my controller

    [HttpPost]
    public ActionResult Accreditation(Accreditation accreditation)
    {
        if (ModelState.IsValid)
        {
            var fileUpload = Request.Files[0];
            var uploadPath = Server.MapPath("~/App_Data/uploads");

            using (var fs = new FileStream(Path.Combine(uploadPath, accreditation.PressCard.ToString()), FileMode.Create))
            {
                var buffer = new byte[fileUpload.InputStream.Length];
                fileUpload.InputStream.Read(buffer, 0, buffer.Length);

                fs.Write(buffer, 0, buffer.Length);
            }

            context.Accreditations.Add(accreditation);
            context.SaveChanges();

            return RedirectToAction("Index");  
        }


           ViewBag.PossibleNationalities = context.Nationalities;
            ViewBag.PossibleNchis = context.Nchis;
            ViewBag.PossibleMedia = context.Media;
            ViewBag.PossibleEmploymentStatus = context.EmploymentStatus;
            return View(accreditation);



    }
}

這是視圖:

@using (Html.BeginForm("Accreditation", "Home", new { enctype = "multipart/form-data" },    FormMethod.Post))
{
   @Html.ValidationSummary(true)
.............
.............

<div class="editor-field">
       <input type="file" name="PressCard" id="PressCard" data-val-required="Press card is required" data-val="true"/>
         @Html.ValidationMessageFor(model => model.PressCard)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Passport)
    </div>
    <div class="editor-field">
       <input type="file" name="Passport" id="Passport" data-val-required="ID/Passport is required" data-val="true"/>
        @Html.ValidationMessageFor(model => model.Passport)
    </div>

..................

....... ........

當我嘗試上傳時，我收到以下錯誤消息:

When I try to upload, i get the following error message:

異常詳細信息:System.ArgumentOutOfRangeException:索引超出范圍.必須是非負數且小于集合的大小.參數名稱:索引

Exception Details: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

任何人都有指向正確方向的指針嗎?

Any one out there with a pointer to the right direction?

抱歉耽擱了.這是新代碼

sorry for delay. Here's the new code

[HttpPost]
public ActionResult Accreditation(Accreditation accreditation, HttpPostedFileBase Passport)
    {
        if (ModelState.IsValid)
        {
            var uploadPath = Server.MapPath("~/App_Data/uploads");

            using (var fs = new FileStream(Path.Combine(uploadPath, accreditation.PressCard.ToString()), FileMode.Create))
            {
                var buffer = new byte[Passport.InputStream.Length];
                Passport.InputStream.Read(buffer, 0, buffer.Length);

                fs.Write(buffer, 0, buffer.Length);
            }

            context.Accreditations.Add(accreditation);
            context.SaveChanges();

            return RedirectToAction("Index");  
        }


           ViewBag.PossibleNationalities = context.Nationalities;
            ViewBag.PossibleNchis = context.Nchis;
            ViewBag.PossibleMedia = context.Media;
            ViewBag.PossibleEmploymentStatus = context.EmploymentStatus;
            return View(accreditation);



    }
}

推薦答案

真的是在上傳數據嗎?我建議你使用這種方式.創建一個類型為 HttpPostedFileBase 的參數，該參數與輸入字段同名，并測試其內容長度屬性.

Are really uploading data? I'd suggest you use this way. Create a parameter of type HttpPostedFileBase with the same name as the input field and test for its content length property.

檢查此鏈接將是您繼續前進的最快方式.

Checking this link will the fastest way for you to move on.

MVC 3 文件上傳和模型綁定

這篇關于使用 MVC 3 上傳文件的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！