将IOS映像上传到.net服务

我正在上传图片（jpg）到.net服务。 如果我上传小图片，上传效果很好，但是当我发送“大”图片（大于1 MB或“大”）图片上传成功时，图片看起来像这样

我通过curltesting了Web服务，它工作正常。

任何想法？ 谢谢！！！！！！

我的上传代码是：

-(void)uploadJPEGImage:(NSString*)requestURL image:(UIImage*)image pictureName: (NSString*)pictureName { NSURL *url = [[NSURL alloc] initWithString:requestURL]; NSMutableURLRequest *urequest = [NSMutableURLRequest requestWithURL:url]; [urequest setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData]; [urequest setHTTPShouldHandleCookies:NO]; [urequest setTimeoutInterval:600]; NSData *postImageData = UIImageJPEGRepresentation(image, 0.9 ); NSMutableData *body = [NSMutableData data]; [urequest setHTTPMethod:@"POST"]; //STEP2 Creating Boundary // There are no rules as of the content of the boundary but as it must not occur in any of the parts of your message content is usually a randomly generated sequence of numbers, letters or combination of both in order to guarantee uniqueness and differentiate from any possible dictionary words. NSString *boundary = @"---------------------------14737809831466499882746641449"; //Setting POST Header NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; [urequest addValue:contentType forHTTPHeaderField:@"Content-Type"]; //STEP3 Begin boundary [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; //STEP4 Adding additional parameters [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n",pictureName] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; //STEP5 Appending Image Data [body appendData:[NSData dataWithData:postImageData]]; //STEP6 Closing boundary [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [urequest setHTTPBody:body]; //Set content length NSString* postlength = [NSString stringWithFormat:@"%d", [body length]]; [urequest setValue:postlength forHTTPHeaderField:@"Content-Length"]; [url release]; NSURLConnection *conaux =[[NSURLConnection alloc] initWithRequest:urequest delegate:self startImmediately:NO]; self.connection = conaux; [conaux release]; NSMutableData *auxdata = [[NSMutableData alloc] init]; self.receivedData = auxdata; [auxdata release]; 

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Answer 1

最后我改变我的代码，我不需要内容长度（我sopouse服务器推断它）

新代码（工作正常）：

 - (void)uploadJPEGImage:(NSString*)requestURL image:(UIImage*)image pictureName:(NSString*)pictureName { NSURL *url = [[NSURL alloc] initWithString:requestURL]; NSMutableURLRequest *urequest = [NSMutableURLRequest requestWithURL:url]; [urequest setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData]; [urequest setHTTPShouldHandleCookies:NO]; [urequest setTimeoutInterval:60]; [urequest setHTTPMethod:@"POST"]; NSString *boundary = @"---------------------------14737809831466499882746641449"; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; [urequest setValue:contentType forHTTPHeaderField: @"Content-Type"]; NSMutableData *body = [NSMutableData data]; // add image data NSData *imageData = UIImageJPEGRepresentation(image, 1.0); if (imageData) { [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", pictureName] dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; [body appendData:imageData]; [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; } [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [urequest setHTTPBody:body]; [url release]; NSURLConnection *conaux =[[NSURLConnection alloc] initWithRequest:urequest delegate:self startImmediately:NO]; self.connection = conaux; [conaux release]; NSMutableData *auxdata = [[NSMutableData alloc] init]; self.receivedData = auxdata; [auxdata release]; 

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