C# - Uploading File To Amazon S3 Using File Upload Control

I've dug around in the SDK and managed to connect to my instance of S3, go into my bucket and create an empty file, but can't figure out how to take a file from my computer and upload it. If I have dragged a file upload control onto the designer surface how do I set the properties for it in the code behind?(If I absolutely need to have a 3rd party uploader which should I use). Here is the code I have so far.

static string bucketName = "myBucket";
static string keyName = "sampleKey";
static AmazonS3 client;
protected void Page_Load(object sender, EventArgs e)
{
string accessKeyID = System.Configuration.ConfigurationManager.AppSettings["AWSAccessKey"];
string secretAccessKeyID = System.Configuration.ConfigurationManager.AppSettings["AWSSecretKey"];
using (client = Amazon.AWSClientFactory.CreateAmazonS3Client(accessKeyID, secretAccessKeyID))
{
// simple object put
PutObjectRequest request = new PutObjectRequest();
request.WithContentBody("this is a test")
.WithBucketName(bucketName)
.WithKey(keyName);
S3Response response = client.PutObject(request);
response.Dispose();
// put a more complex object with some metadata and http headers.
PutObjectRequest titledRequest = new PutObjectRequest();
titledRequest.WithMetaData("title", "the title")
.WithContentBody("this object has a title")
.WithBucketName(bucketName)
.WithKey(keyName);
using (S3Response responseWithMetadata = client.PutObject(request))
{
WebHeaderCollection headers = response.Headers;
foreach (string key in headers.Keys)
{
Console.WriteLine("Response Header: {0}, Value: {1}", key, headers.Get(key));
}
}
}
}