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  • 根据图片URL地址下载图片

         /// <summary>
            /// 下载图片
            /// </summary>
            /// <param name="picUrl">图片Http地址</param>
            /// <param name="savePath">保存路径</param>
            /// <param name="timeOut">Request最大请求时间,如果为-1则无限制</param>
            /// <returns></returns>
            public bool DownloadPicture(string picUrl, string savePath, int timeOut)
            {
                bool value = false;
                WebResponse response = null;
                Stream stream = null;
                try
                {
                    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(picUrl);
                    if (timeOut != -1) request.Timeout = timeOut;
                    response = request.GetResponse();
                    stream = response.GetResponseStream();
                    if (!response.ContentType.ToLower().StartsWith("text/"))
                        value = SaveBinaryFile(response, savePath);
                }
                finally
                {
                    if (stream != null) stream.Close();
                    if (response != null) response.Close();
                }
                return value;
            }
            private static bool SaveBinaryFile(WebResponse response, string savePath)
            {
                bool value = false;
                byte[] buffer = new byte[1024];
                Stream outStream = null;
                Stream inStream = null;
                try
                {
             string dic = Path.GetDirectoryName(savePath);
                    if (string.IsNullOrEmpty(dic)) return false;
                    if (Directory.Exists(dic) == false) Directory.CreateDirectory(dic);
    if (File.Exists(savePath)) File.Delete(savePath); outStream = System.IO.File.Create(savePath); inStream = response.GetResponseStream(); int l; do { l = inStream.Read(buffer, 0, buffer.Length); if (l > 0) outStream.Write(buffer, 0, l); } while (l > 0); value = true; } finally { if (outStream != null) outStream.Close(); if (inStream != null) inStream.Close(); } return value; }
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  • 原文地址:https://www.cnblogs.com/zyl1994/p/12401316.html
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