Post image and text from iPhone to asp.net

I am trying to send images and text from an iPhone application to a asp.net webpage.

By following this example I now have the following method in xcode for uploading an image:

- (BOOL) uploadData {
    NSData *imageData = UIImageJPEGRepresentation([serviceForm image], 0.9);
    NSString *urlString = @"http://someUrl/SubmitSchema.ashx";
    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"POST"];

    NSString *boundary = @"---------------------------14737809831466499882746641449";
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"ipodfile.jpg\"\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]];

    [request setHTTPBody:body];

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    BOOL success = [returnString isEqualToString:@"ok"];
    [returnString release];

    return success;
}

At the bottom on the same article there is a suggestion about creating an asp.net generic handler. Based on this, I have the following simple code for saving the image:

public void ProcessRequest(HttpContext context)
{
    context.Response.ContentType = "text/plain";
    foreach (var name in context.Request.Files.AllKeys)
    {
        var file = context.Request.Files.Get(name);
        SaveFile(file);
    }
}

private void SaveFile(HttpPostedFile file)
{
    var fileName = Path.GetFileName(file.FileName);
    var path = "C:\\Test\\" + fileName;

    file.SaveAs(path);
}

This works and the image is saved开发者_开发知识库, but I have not yet managed to include a string of text in the same post. The text I want to send can be quite long, and I suppose it is better to include this in the posted data rather than as a query string?

How would you add some text to the posted data and read it in .net?

I'm not an Objective-C expert but from a little Googling I found a discussion and a working example of sending a file and form fields in a single request.

On the server, you can pull the data out again on the other side using:

string data = Request.Form["name"];

If you get stuck, Fiddler is a great tool for sniffing HTTP requests.

One option is to send the long string with content type as form encoded content then using context.Request.Form to get the value of the posted string. As you have a large string it can be put in a single form value as "data='large string'" and in server side you can do context.Request.Form["data"] to get the string. NOTE: you have to properly encode the string so that any = or & are encoded before being posted