C# Async Webrequest

Question

I need to call a url like the following, programmatically, using C#:

http://mysite.com/AdjustSound.php

This php file expects a SoundLevel from me. So, an example call would be something like that:

http://mysite.com/AdjustSound.php?SoundLevel=30

I have 2 questions:

1:

WebRequest request = 
   WebRequest.Create("http://mysite.com/AdjustSound.php?SoundLevel=30");
// Which one?
// request.Method = "GET";
// request.Method = "POST";

Question 1: Do I need to make a GET or POST request?

2:

Since, I'm making this http-call very frequently (10-20 times in a sec); I have some speed issues. So, I don't want my program to wait till this http call finishes and retrieves the result. I want that Webrequest to run asynchronously.

The other issue is that I don't need to see the results of this http call. I just want to invoke the server side. And even, I don't care if this call finished successfully or not... (If it fails, most probably I will adjust the sound a few milliseconds later. So, I don't care.) I wrote the following code:

WebRequest request = 
     WebRequest.Create("http://mysite.com/AdjustSound.php?SoundLevel=30");
request.Method = "GET";
request.BeginGetResponse(null, null);

Question 2 : Doest it seem ok to run this code? Is that ok to call request.BeginGetResponse(null, null); ?

EDIT

After reading the comments; I modified my code like the following:

WebClient webClient = new WebClient();
Uri temp = new Uri("http://mysite.com/AdjustSound.php?SoundLevel=30");
webClient.UploadStringAsync(temp, "GET", "");

Is that ok/better now?

Unless you can name a reason to use HttpWebRequest, I recommend you use WebClient (<=.NET4.0) or HttpClient (>=.NET4.5). — dtb
– dtb, Commented Jun 18, 2012 at 18:54
GET or POST depends on the PHP script. If you can open the URL in your web browser without submitting a form, it's a GET. — dtb
– dtb, Commented Jun 18, 2012 at 18:56
It is not ok to call request.BeginGetResponse(null, null);. You must call EndGetResponse. Better: use WebClient or HttpClient. Don't forget to dispose objects. — dtb
– dtb, Commented Jun 18, 2012 at 18:56
I'm making this http-call very frequently (10-20 times in a sec) - are you sure HTTP is the right way to do this? Is the HTTP server local? — vcsjones
– vcsjones, Commented Jun 18, 2012 at 18:58
Can you provide some basic code examples using WebClient or HttpClient for my case? — Sait
– Sait, Commented Jun 18, 2012 at 19:02

paulsm4 · Accepted Answer · 2012-06-18 18:56:47Z

1

Q: Do I need to make a GET or POST request?

A: This example effectively is a "GET" request. Here, I'd use "GET". If you had a form, I'd instead recommend "POST"

Q: I'm making this http-call very frequently (10-20 times in a sec); I have some speed issues.

If you happen to have the luxury of using .Net 4.x, I'd strongly recommended looking at their "asynchronous APIs":

answered Jun 18, 2012 at 18:56

paulsm4

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3 Comments

Sait Over a year ago

I thought BeginGetResponse() is an asynchronous call.

paulsm4 Over a year ago

It is. But really, you're much better off using a .Net 4.x "HttpClient", as discussed in the above links. IMHO...

Sait Over a year ago

Can you provide some basic code examples using HttpClient for my case then?

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