Upload Files with Params

Demonstrates how to upload files with extra form parameters from an application to a web server. Note: There must be something provided on the server-side to consume the upload. It could be an ASP or ASP.NET script, Perl, C++ CGI, PHP, Ruby, etc,. However, uploading via HTTP is not the same as uploading via FTP where the FTP server handles receiving the file and saving to disk.

The C# code behind http://www.chilkatsoft.com/receiveUpload.aspx may be found at this URL: C# to Receive Upload in ASP.NET.

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bool success;
Chilkat.Http http = new Chilkat.Http();

//  Any string unlocks the component for the 1st 30-days.
success = http.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show(http.LastErrorText);
    return;
}

//  Build a HTTP request with the files to be uploaded:
Chilkat.HttpRequest req = new Chilkat.HttpRequest();
req.UseUpload();

//  The URL we'll be posting to is:
//  http://www.chilkatsoft.com/receiveUpload.aspx
//  Therefore, the path part of the URL is:
req.Path = "/receiveUpload.aspx";

//  Note: You may test uploads to this URL, but anything over 80K will be aborted on the receiving side.

//  Add some files to the request:
//  The 1st argument is an arbitrary name.  It's the POST form field name.
//  The 2nd argument is the filename currently existing on
//  the local filesystem.  It may include an absolute or relative
//  path, or no path at all if it's in the current working directory.
success = req.AddFileForUpload("file1","hamlet.xml");
if (success != true) {
    MessageBox.Show(req.LastErrorText);
    return;
}

success = req.AddFileForUpload("file2","dude.gif");
if (success != true) {
    MessageBox.Show(req.LastErrorText);
    return;
}

//  Additional non-file params may be added to the POST request
//  by calling AddParam:
req.AddParam("extraParam1","abc123");
req.AddParam("extraParam2","This is the content for my POST param");

//  Send the HTTP POST and get the response.  Note: This is a blocking call.
//  The method does not return until the full HTTP response is received.
string domain;
int port;
bool ssl;
domain = "www.chilkatsoft.com";
port = 80;
ssl = false;
Chilkat.HttpResponse resp = null;
resp = http.SynchronousRequest(domain,port,ssl,req);
if (resp == null ) {
    textBox1.Text += http.LastErrorText + "\r\n";
}
else {
    //  Display the HTML source of the page returned.
    textBox1.Text += resp.BodyStr + "\r\n";
}