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  • 如何通过一个Url获得图片的大小

     HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                        WebResponse response = request.GetResponse();
                        Stream stream = response.GetResponseStream();
                        byte[] buffer = new byte[1024];

                        if (!response.ContentType.ToLower().StartsWith("text/"))
                        {
                            try
                            {
                                Stream outStream = new MemoryStream();
                                Stream inStream = response.GetResponseStream();

                                int bufferLength;
                                do
                                {
                                    bufferLength = inStream.Read(buffer, 0, buffer.Length);
                                    if (bufferLength > 0)
                                        outStream.Write(buffer, 0, bufferLength);
                                }
                                while (bufferLength > 0);

                                outStream.Flush();
                                outStream.Seek(0, SeekOrigin.Begin);
                                inStream.Close();

                                Image image = Image.FromStream(outStream);
                                outStream.Close();
                                MessageBox.Show("image   :=" + image.Width + "X" + image.Height);
                                image.Dispose();
                            }
                            catch (Exception ex)
                            {
                                MessageBox.Show("非图像格式 " + ex.Message);
                            }
                        }
                        else
                        {
                            MessageBox.Show("非图像格式");
                        }

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  • 原文地址:https://www.cnblogs.com/q101301/p/3657099.html
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