DotNetZip

Question

当我尝试提取 "test.png" 时，我收到以下错误：此流不支持查找操作。

也可以使用通配符吗？ var entry = zipout["*.png"];流媒体时我不会知道同样的事情。

            var request = (HttpWebRequest)WebRequest.Create("http://www.xxx.xxxx.com/xxx/xxxx?key=ndXqH2fXzePomlVoX39trxUf%2FV1bfN0rZsHsTyEvI%2F0%3D&labelFormat=png");

            using (var ms = new MemoryStream())
            {
               using (var response = (HttpWebResponse)request.GetResponse())
               {
                  using (var stream =response.GetResponseStream())
                  {
                    using (var zipout = ZipFile.Read(stream))
                    {
                        var entry = zipout["test.png"];
                        entry.Extract(ms);
                    }
                  }
                }
            }

已更新

            using (var response = request.GetResponse())
            {
                using (var responseStream = response.GetResponseStream())
                {
                    using (var stream = new MemoryStream())
                    {
                        if (responseStream != null)
                        {
                            responseStream.CopyTo(stream);
                        }

                        using (var zipout = ZipFile.Read(stream))
                        {
                            using (var ms = new MemoryStream())
                            {
                                var entry = zipout["test.png"];
                                entry.Extract(ms);
                            }
                        }
                    }
                }
            }

新错误：消息 = "Cannot read that as a ZipFile"

Answer 1

var request = (HttpWebRequest)WebRequest.Create("var request = (HttpWebRequest)WebRequest.Create("http://www.xxx.xxxx.com/xxx/xxxx?key=ndXqH2fXzePomlVoX39trxUf%2FV1bfN0rZsHsTyEvI%2F0%3D&labelFormat=png");

            using (var response = request.GetResponse())
            {
                using (var responseStream = response.GetResponseStream())
                {
                    using (var stream = new MemoryStream())
                    {
                        if (responseStream == null)
                        {
                            return;
                        }

                        responseStream.CopyTo(stream); 
                        stream.Position = 0;

                        using (var zipout = ZipFile.Read(stream))
                        {
                            using (var ms = new MemoryStream())
                            {
                                var entry = zipout["test.png"];

                                if (entry != null)
                                {
                                    entry.Extract(ms);
                                }
                                else
                                {
                                    return;
                                }
                            }
                        }
                    }
                }
            }

DotNetZip - 此流不支持查找操作

DotNetZip - This stream does not support seek operations