从URL将图像拉入字节数组

Posted 2021-02-24

This snippet pulls down an image from a URL into a byte(). From there you can re-size or save.

Don't forget the necessary try - catch.

public byte[] getImageFromUrl(string url)
    {
        System.Net.HttpWebRequest request = null;
        System.Net.HttpWebResponse response = null;
        byte[] b = null;
 
        request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
        response = (System.Net.HttpWebResponse)request.GetResponse();
 
        if (request.HaveResponse)
        {
            if (response.StatusCode == System.Net.HttpStatusCode.OK)
            {
                Stream receiveStream = response.GetResponseStream();
                using (BinaryReader br = new BinaryReader(receiveStream))
                {
                    b = br.ReadBytes(500000);
                    br.Close();
                }
            }
        }
 
        return b;
    }