Question

Once a UploadValuesCompleted Event has fired, is it possible to get the NameValueCollection that was uploaded in the request?

I want the possibility to resend a duplicate of a request.

I am doing something like this:

NameValueCollection data = new NameValueCollection();
data.Add("myParam", "myValue");

WC.Headers["Content-Type"] = "application/x-www-form-urlencoded";
WC.UploadValuesAsync(Url, "POST", data);

Answer 1

Your event handler can access data if you pass data to it, for example by using closure semantics or an instance variable.

It could look like this:

WebClient client = new WebClient();
var data = GetPostData();
client.UploadValuesCompleted += (sender, e) => { Console.WriteLine(data); };
UploadValuesAsync("url", "POST", data);

The event handler now has access to data.