ASP.NET MVC文件上传错误--“输入不是有效的Bas-64字符串”

Question

我试图将文件上传控件添加到我的ASP.NET MVC 2表单中，但是在选择jpg并单击Save后，会出现以下错误：

输入不是有效的基- 64字符串，因为它包含一个非基本的64个字符、两个以上的填充字符或填充字符之间的一个非空白字符。。

以下是您的看法：

<% using (Html.BeginForm("Save", "Developers", FormMethod.Post, new {enctype = "multipart/form-data"})) { %>
    <%: Html.ValidationSummary(true) %>
    <fieldset>
        <legend>Fields</legend>

        <div class="editor-label">
            Login Name
        </div>
        <div class="editor-field">
            <%: Html.TextBoxFor(model => model.LoginName) %>
            <%: Html.ValidationMessageFor(model => model.LoginName) %>
        </div>

        <div class="editor-label">
            Password
        </div>
        <div class="editor-field">
            <%: Html.Password("Password") %>
            <%: Html.ValidationMessageFor(model => model.Password) %>
        </div>

        <div class="editor-label">
            First Name
        </div>
        <div class="editor-field">
            <%: Html.TextBoxFor(model => model.FirstName) %>
            <%: Html.ValidationMessageFor(model => model.FirstName) %>
        </div>

        <div class="editor-label">
            Last Name
        </div>
        <div class="editor-field">
            <%: Html.TextBoxFor(model => model.LastName) %>
            <%: Html.ValidationMessageFor(model => model.LastName) %>
        </div>

        <div class="editor-label">
            Photo
        </div>
        <div class="editor-field">
            <input id="Photo" name="Photo" type="file" />
        </div>

        <p>
            <%: Html.Hidden("DeveloperID") %>
            <%: Html.Hidden("CreateDate") %>
            <input type="submit" value="Save" />
        </p>
    </fieldset>
<% } %>

控制员：

//POST: /Secure/Developers/Save/
        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Save(Developer developer)
        {
            //get profile photo.
            var upload = Request.Files["Photo"];
            if (upload.ContentLength > 0)
            {
                string savedFileName = Path.Combine(
                      ConfigurationManager.AppSettings["FileUploadDirectory"],
                      "Developer_" + developer.FirstName + "_" + developer.LastName + ".jpg");
                upload.SaveAs(savedFileName);
            }
            developer.UpdateDate = DateTime.Now;
            if (developer.DeveloperID == 0)
            {//inserting new developer.
                DataContext.DeveloperData.Insert(developer);
            }
            else
            {//attaching existing developer.
                DataContext.DeveloperData.Attach(developer);
            }
            //save changes.
            DataContext.SaveChanges();
            //redirect to developer list.
            return RedirectToAction("Index");
        }

谢谢，贾斯汀

Answer 1

我刚刚尝试了你的代码，并能够上传没有任何问题。我没有保存到数据库，我的开发人员类也没有照片属性。

namespace MvcApplication5.Controllers
{
    public class Developer
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public DateTime UpdateDate { get; set; }
        public int DeveloperID { get; set; }
        public string LoginName { get; set; }
        public string Password { get; set; }
    }
}

控制器

public class DefaultController : Controller
{
    //
    // GET: /Default/

    [AcceptVerbs(HttpVerbs.Get)]
    public ActionResult Index()
    {
        return View();
    }

    [AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Save(Developer developer)
    {
        //get profile photo. 
        var upload = Request.Files["Photo"];
        if (upload.ContentLength > 0)
        {
            string savedFileName = Path.Combine(
                  @"C:\temp",
                  "Developer_" + developer.FirstName + "_" + developer.LastName + ".jpg");
            upload.SaveAs(savedFileName);
        }
        developer.UpdateDate = DateTime.Now;
        if (developer.DeveloperID == 0)
        {//inserting new developer. 

        }
        else
        {//attaching existing developer. 

        }
        //save changes. 

        //redirect to developer list. 
        return RedirectToAction("Index");
    }

}

视图

<div>
        <% using (Html.BeginForm("Save", "Default", FormMethod.Post, new { enctype = "multipart/form-data" }))
           { %>
        <%: Html.ValidationSummary(true)%>
        <fieldset>
            <legend>Fields</legend>
            <div class="editor-label">
                Login Name
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.LoginName)%>
                <%: Html.ValidationMessageFor(model => model.LoginName)%>
            </div>
            <div class="editor-label">
                Password
            </div>
            <div class="editor-field">
                <%: Html.Password("Password")%>
                <%: Html.ValidationMessageFor(model => model.Password)%>
            </div>
            <div class="editor-label">
                First Name
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.FirstName)%>
                <%: Html.ValidationMessageFor(model => model.FirstName)%>
            </div>
            <div class="editor-label">
                Last Name
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.LastName)%>
                <%: Html.ValidationMessageFor(model => model.LastName)%>
            </div>
            <div class="editor-label">
                Photo
            </div>
            <div class="editor-field">
                <input id="Photo" name="Photo" type="file" />
            </div>
            <p>
                <%: Html.Hidden("DeveloperID")%>
                <%: Html.Hidden("CreateDate")%>
                <input type="submit" value="Save" />
            </p>
        </fieldset>
        <%} %>
    </div>

Answer 2

我最近找到了一个解决方案，尽管我现在使用的是MVC3而不是MVC2。

在保存操作中，从绑定对象中排除二进制字段，并包含一个单独的HttpPostedFileBase字段：

例如：

public ActionResult Save([Bind(Exclude = "Photo")]Developer developer, HttpPostedFileBase Photo) {...}

请注意，您也可以这样做，以避免包含视图中的Html.Hidden元素。例如：

public ActionResult Save([Bind(Exclude = "Photo,DeveloperID,CreateDate")]Developer developer, HttpPostedFileBase Photo) {...}

然后可以直接使用这个HttpPostedFileBase对象，而不需要访问Request.Files。

就个人而言，我实际上使用以下代码将这些类型的图像存储在数据库中的SQL "image“字段中：

if (Picture != null)
{
    if (Picture.ContentLength > 0)
    {
        byte[] imgBinaryData = new byte[Picture.ContentLength];
        int readresult = Picture.InputStream.Read(imgBinaryData, 0, Picture.ContentLength);
        Developer.Picture = imgBinaryData;
    }
}

希望这有帮助..。

标记

Answer 3

我也有同样的问题。这是我找到的解决办法。阶级财产：

public byte[] Logo { get; set; }

查看代码：

@using (Html.BeginForm("StoreMyCompany", "MyCompany", FormMethod.Post, new { id = "formMyCompany", enctype = "multipart/form-data" }))
{
 <div class="form-group">
  @Html.LabelFor(model => model.modelMyCompany.Logo, htmlAttributes: new { @class = "control-label col-md-3" })
    <div class="col-md-6">
    <input type="file" name="Logo" id="fileUpload" accept=".png,.jpg,.jpeg,.gif,.tif" />
    </div>
 </div>
 }

控制器代码：

 public ActionResult StoreMyCompany([Bind(Exclude = "Logo")]MyCompanyVM model)
    {
        try
        {
            Company objCompany = new Company();

            byte[] imageData = null;
            if (Request.Files.Count > 0)
            {
                HttpPostedFileBase objFiles = Request.Files["Logo"];

                using (var binaryReader = new BinaryReader(objFiles.InputStream))
                {
                    imageData = binaryReader.ReadBytes(objFiles.ContentLength);
                }
            }
        }
        catch (Exception ex)
        {
            Utility.LogError(ex);
        }

        return View();
    }
}

我只是把Logo排除在管理员的电话之外。