使用ASIFormDataRequest时如何实现C#服务器端？

Question

我正在尝试使用 ASIFormDataRequest 将数据发送到 ASP.net 服务器端。 我已经创建了一个 aspx 页面。目前我可以得到这两个纯文本。 但是我不知道如何通过 Request.Form 在 C# 中传递 NSdata。

这是 Obj-C 代码：

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setPostValue:@"Ben" forKey:@"name"];
[request setPostValue:@"Copsey" forKey:@"code"];
[request setFile:@"/Users/ben/Desktop/ben.jpg" forKey:@"photo"];
[request setData:imageData withFileName:@"myphoto.jpg" andContentType:@"image/jpeg" forKey:@"photo"];

这是当前 C# 代码：

 string name = Request.Form["name"] == null ? "" : Request.Form["name"];
 string code = Request.Form["code"]==null?"":Request.Form["code"];

如您所见，在 iphone 中，我尝试将图像发送到 C# 服务器端，但我不知道该怎么做？

Answer 1

要将图像发送到 WCF REST 服务，使用 ASIFormDataRequest .. 这是我们在生产中的项目的示例...

假设我在一个名为“image”的变量中有一个 UIImage

NSString *surl = @"http:www.SomeRestService.com"    
NSURL *url = [NSURL URLWithString:surl];

ASIFormDataRequest *r = [ASIFormDataRequest requestWithURL:url];
[r setValidatesSecureCertificate:NO];
[r setTimeOutSeconds:30];
[r setRequestMethod:@"POST"]; //default is POST (insert), 
[r setDelegate:self];
[r setDidFailSelector:@selector(requestDidFail:)];
//[r addRequestHeader:@"Content-Type" value:@"application/json"]   this will cause the call to fail.  No content-type header for this call.


NSMutableData *imageData = [NSMutableData dataWithData:UIImageJPEGRepresentation(image, .35)]; //we are really compressing our images.. you can do what you want, of course.
[r setPostBody:imageData];
[r setDidFinishSelector:@selector(imageSaveDidFinish:)];
[r startAsynchronous];

OK, on the WCF side, you need to define a method that receives a System.IO.Stream, and that Stream needs to be the last parameter defined, it sould be a POST, and should not contain any other parameters as part of the POST 正文（您可以在 URL 和查询字符串中定义参数，尽管一些纯粹主义者会说这对于 REST POST 来说是不好的形式）。

[WebInvoke(UriTemplate = "Upload", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare, Method = "POST")]
        public GenericObject SaveReceiptImage(System.IO.Stream imageStream)
        {
                            try
            {
                byte[] buffer = new byte[16 * 1024];

                using (MemoryStream ms = new MemoryStream())
                {
                    int read = 0;
                    while ((read = imageStream.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        ms.Write(buffer, 0, read);
                    }

                    ms.Position = 0;

                    if (ms.Length > 0)
                    {
                      //save your byte array to where you want
                    }
                    else
                    {
                      // woops, no image was passed in
                    }
                }
            }
            catch (Exception ex)
            {
                //bad error occured, log it
            }

            return whatever;
        }

Answer 2

请检查以下链接：

http://allseeing-i.com/ASIHTTPRequest/How-to-use

http://www.iphonedevsdk.com/forum/iphone-sdk-development-advanced-discussion/29519-help-http-post-using-asiformdatarequest.html