iPhone:NSData和字节对话问题？

我想将iPhone图像发送到服务器数据库。我编写了以下代码。我遇到数据不匹配异常，无法解决它。谁能帮我一下吗

iPhone端的代码：

- (void) uploadUserInfo:(NSString*)userId profilePic:(UIImage*)profilePic {

    __block ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL: [NSURL URLWithString:[NSString stringWithFormat:@"%@/%d/uploadUserInfo?cultureDetect=false", dataUrl, currentAppID]]];

    [request setPostValue:userId forKey: @"userId"];
    // Upload an image
    [request addPostValue:@"pic.jpg" forKey:@"fileName"];
    NSData* imageData = UIImageJPEGRepresentation(profilePic, 1);
    [request setData:imageData withFileName:@"pic.jpg" andContentType:@"image/jpeg" forKey:@"profilePic"];

    [request setDelegate:self];
    [request setDidFinishSelector:@selector(uploadRequestFinished:)];
    [request setDidFailSelector:@selector(uploadRequestFailed:)];

    [queue addOperation: request];
    [queue go];

}

ASP.NET MVC网站控制器上的代码：

    public void uploadUserInfo(string userId, string fileName, byte[] profilePic)
    {
        int ID;
        if (int.TryParse(appId, out ID) && fileName != null && profilePic != null)
        {
            Image model = new Image();
            System.Drawing.Image image = System.Drawing.Image.FromStream(new System.IO.MemoryStream(profilePic));
            System.Drawing.Point maxSize = FileUtils.GetImageMaxSize(Image.ImageTypeEnum.TableCellImage);
            System.Drawing.Image thumb = ImageUtilities.GetFixedSizeImage(image, InterpolationMode.HighQualityBicubic, null, PixelFormat.Format32bppArgb, maxSize.X, maxSize.Y, false);
            byte[] resizedContent = ImageUtilities.GetBytesFromImage(thumb, ImageFormat.Png);
            model.AmendedDateTime = DateTime.Now;
            model.ApplicationId = ID;
            model.ImageType = Image.ImageTypeEnum.TableCellImage;
            string contentType = ImageUtilities.GetContentType(resizedContent);

            FileInfo f = new FileInfo(fileName);
            string name = f.Name.Substring(0, f.Name.Length - f.Extension.Length);
            string extension = f.Extension.Substring(1);

            BinaryFile file = new BinaryFile()
            {
                ContentType = contentType,
                FileName = name,
                FileExtension = extension
            };

            file.Data = resizedContent;
            model.BinaryFile = file;

            this.DataContext.Images.Table.InsertOnSubmit(model);

            ValidateAndSubmitChanges();
        }
        return;
    }

在我的方法开始执行之前，我遇到了以下错误。i、 我猜MVC引擎在数据类型不匹配时直接抛出异常

 [FormatException]: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters. 
   at System.Convert.FromBase64String(String s)
   at System.Web.Mvc.ByteArrayModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
   at System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor)
   at System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)
   at System.Web.Mvc.Controller.ExecuteCore()
   at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__4()
   at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass1.<MakeVoidDelegate>b__0()
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

转换为Base64会出现相同的异常

使用ASIHTTPRequest内置静态方法：

  NSData* imageData = UIImageJPEGRepresentation(profilePic, 1);
  [request setData:[ASIHTTPRequest base64forData:imageData] withFileName:@"pic.jpg" andContentType:@"image/jpeg" forKey:@"profilePic"];

使用线程中给出的方法：

---

从您列出的错误中：

[FormatException]: The input is not a valid Base-64 string as it contains a non-base 64 character...

我猜您需要对上传到服务器的数据进行Base64编码

因此，我建议使用Base64库对数据进行编码

---

并找出如何做到这一点。我在自己的代码中使用的NSData类别在Alex Reynolds编写的答案中。

这让我非常恼火！我只需要将Byte[]替换为HttpPostedFileBase，它会自动处理发布的文件

iPhone代码：

    - (void) uploadUserInfo:(NSString*)userId profilePic:(UIImage*)profilePic {

    __block ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL: [NSURL URLWithString:[NSString stringWithFormat:@"%@/app/%d/phone/uploadUserInfo?cultureDetect=false", dataUrl, currentAppID]]];

    NSData* imageData = UIImageJPEGRepresentation(profilePic, 1);
    [request setData:imageData  withFileName:@"pic.jpg" andContentType:@"image/jpeg" forKey:@"imageFile"];

    [request setDelegate:self];
    [request setDidFinishSelector:@selector(uploadRequestFinished:)];
    [request setDidFailSelector:@selector(uploadRequestFailed:)];

    [queue addOperation: request];
    [queue go];
}

ASP.NET MVC控制器代码：

public void uploadUserInfo(HttpPostedFileBase imageFile)
{
       // Process imageFile
}

---

嗨，迈克尔，谢谢你的信息。我已经通过了你发给我的链接。我尝试使用[ASIHTTPRequest base64forData:imageData]静态方法，正如在我的原始问题中编辑的那样，但它给出了相同的异常！此外，如果我删除发送图像数据，那么其他一切工作都很好！所以objective-c上的NSData和ASP.NET MVC上的byte一定有关系！不知道发生了什么。我只是尝试使用亚历克斯·雷诺兹（Alex Reynolds）创作的那些类别，但同样的例外！编辑了这个问题。

    - (void) uploadUserInfo:(NSString*)userId profilePic:(UIImage*)profilePic {

    __block ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL: [NSURL URLWithString:[NSString stringWithFormat:@"%@/app/%d/phone/uploadUserInfo?cultureDetect=false", dataUrl, currentAppID]]];

    NSData* imageData = UIImageJPEGRepresentation(profilePic, 1);
    [request setData:imageData  withFileName:@"pic.jpg" andContentType:@"image/jpeg" forKey:@"imageFile"];

    [request setDelegate:self];
    [request setDidFinishSelector:@selector(uploadRequestFinished:)];
    [request setDidFailSelector:@selector(uploadRequestFailed:)];

    [queue addOperation: request];
    [queue go];
}

public void uploadUserInfo(HttpPostedFileBase imageFile)
{
       // Process imageFile
}