HTTP Content Negotiation - Selecting Language Preference

C# sample program showing how to select language preference in HTTP requests using the Accept-Language header field. This is called "HTTP content negotiation".

Chilkat.Http http = new Chilkat.Http();
bool unlocked = http.UnlockComponent("Any string begins 30-day trial");
if (!unlocked)
{
    MessageBox.Show("Failed to unlock HTTP component");
    return;
}

// Indicate that we prefer German web pages by setting the Accept-Language
// request header.  This affects all resources fetched via the 
// QuickGet and QuickGetStr methods.
// The following Accept-Language string tells web servers that we prefer
// German, then English, and then anything else.
// For more information, do a Google search on "HTTP content negotiation".
http.AcceptLanguage = "de,en; q=0.5";

// The Debian web site will return pages in the preferred language.
// (i.e., it pays attention to the Accept-Language header field.)
// Try changing the language to "es,en; q=0.5" and you will notice that
// the page returned is Spanish.
string htmlPage = http.QuickGetStr("http://www.debian.org/");

if (htmlPage == null)
{
    MessageBox.Show(http.LastErrorText);
}
else
{
    textBox1.Text = htmlPage;
}

Important: The download for this example does not contain the ChilkatDotNet.dll which
must be downloaded and installed separately at http://www.chilkatsoft.com/downloads.asp.
Once installed, add a reference to the DLL in the project by following the instructions at
http://www.example-code.com/vbdotnet/step2.asp