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POGet Variable from httpcontext coming from NSUrlRequest
 

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    <p>This question will be a nice tutorial for http connection "POST" between Iphone and asp.net server :) what i'm trying to do is to send an image from iphone to Asp.net server; Here my uploadImage fonction in objective-c :</p> <pre><code>- (IBAction)uploadImage { /* turning the image into a NSData object getting the image back out of the UIImageView setting the quality to 90 */ NSData *imageData = UIImageJPEGRepresentation(image.image, 33); // setting up the URL to post to NSString *urlString = @"MyWebServiceUrl"; // setting up the request object now NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:urlString]]; [request setHTTPMethod:@"POST"]; /* add some header info now we always need a boundary when we post a file also we need to set the content type You might want to generate a random boundary.. this is just the same as my output from wireshark on a valid html post */ NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"]; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; /* now lets create the body of the post */ NSMutableData *body = [NSMutableData data]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; filepath=\"ProfilePic\"; filename=\"ipodfile\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[NSData dataWithData:imageData]]; [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; // setting the body of the post to the reqeust [request setHTTPBody:body]; // now lets make the connection to the web NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; NSLog(@"%@", returnString); </code></pre> <p>}</p> <p>And here is my webService Fonctions that parse the data sent and save the file :</p> <pre><code>public class SaveData : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; bool hasErrors = false; HttpFileCollection filesPosted = context.Request.Files; String filePath = context.Request.QueryString["filepath"]; String fileName = context.Request.QueryString["filename"]; try { if (String.IsNullOrEmpty(fileName) || String.IsNullOrEmpty(filePath) || filesPosted.Count &lt;= 0) hasErrors = true; if (!hasErrors) { HttpContext.Current.Response.Write(WriteFile(filesPosted[0], filePath, fileName)); } else { context.Response.Write("Failed: parsing error"); } } catch (Exception ex) { context.Response.Write("Failed: exception error:::" + ex.Message); } } private string WriteFile(HttpPostedFile file, String filePath, String fileName) { System.IO.Directory.CreateDirectory(filePath); int counter = 0; string path = String.Format("{0}\\{1}.jpg", filePath, fileName); while (System.IO.File.Exists(path)) { counter++; path = String.Format("{0}\\{1}-{2}.jpg", filePath, fileName, counter); } file.SaveAs(path); return path; } public bool IsReusable { get { return false; } } } </code></pre> <p>my problem come from this two lines </p> <pre><code> String filePath = context.Request.QueryString["filepath"]; String fileName = context.Request.QueryString["filename"]; </code></pre> <p>context.Request.QueryString is returning null so my hasErrors is false; any ideas how to fix that will be so appreciated, thanks for all.</p>
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