(C# UWP/WinRT) Download Web Page to MHT and Extract Images (all in memory)

Downloads a web page to an MHT archive (in memory) and then extracts each image to a byte array in memory.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Note: This URL exists at the time of writing and testing this example (on 12-June-2020)
// However, it will surely not continue to exist for very long.
// You should choose a different URL.  (Any web page with images will do.)
string url = "https://www.fendi.com/it/abbigliamento-uomo/cravatta-fxc160a3nwf0qg2";

Chilkat.Mht mht = new Chilkat.Mht();

// Downloads to an MHT string.
// MHT is just MIME, which is the same format as an email but with different semantics.
string mhtStr = await mht.GetMHTAsync(url);
if (mht.LastMethodSuccess == false) {
    Debug.WriteLine(mht.LastErrorText);
    return;
}

// We can still treat the MHT MIME as an email and iterate over the "related items".
Chilkat.Email email = new Chilkat.Email();
bool success = email.SetFromMimeText(mhtStr);
if (success == false) {
    Debug.WriteLine(email.LastErrorText);
    return;
}

int numRelatedItems = email.NumRelatedItems;
int i = 0;
Chilkat.StringBuilder sbContentType = new Chilkat.StringBuilder();
while (i < numRelatedItems) {
    sbContentType.SetString(email.GetRelatedContentType(i));
    Debug.WriteLine("Content-Type: " + sbContentType.GetAsString());

    if (sbContentType.StartsWith("image/",false) == true) {
        // We have an image.
        // Get the image data.
        byte[] imageData = email.GetRelatedData(i);

        // Do what you need with the image data..
    }

    i = i + 1;
}