BiliRanking.Core.Updater.Http_DownloadStringCompleted C# (CSharp) Method

Http_DownloadStringCompleted() private method

private Http_DownloadStringCompleted ( object sender, DownloadStringCompletedEventArgs e ) : void
sender object
e System.Net.DownloadStringCompletedEventArgs
return void
        private void Http_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
        {
            try
            {
                string response = e.Result;

                JArray result = JArray.Parse(response);
                List<Asset> asserts = new List<Asset>();

                bool hasBeta = false;
                bool hasStable = false;

                if (result != null)
                {
                    foreach (JObject release in result)
                    {
                        if ((bool)release["prerelease"])
                        {
                            if (!hasBeta)
                            {
                                Asset ass = new Asset();
                                ass.Parase(release);
                                if (ass.IsNewVersion(Version))
                                {
                                    asserts.Add(ass);
                                    hasBeta = true;
                                }
                            }
                        }
                        else
                        {
                            Asset ass = new Asset();
                            ass.Parase(release);
                            if (ass.IsNewVersion(Version))
                            {
                                asserts.Add(ass);
                                hasStable = true;
                            }
                            break;
                        }
                    }
                }

                if (asserts.Count != 0)
                {
                    foreach (Asset ass in asserts)
                    {
                        Log.Info($"发现新版本{ass.name}" + (ass.prerelease ? "beta" : ""));
                    }
                    int stable = asserts.Count - 1;
                    string changelog = "更新日志获取失败惹 T T";
                    try
                    {
                        changelog = BiliInterface.GetHtml("https://raw.githubusercontent.com/SkiTiSu/BiliRanking/master/BiliRanking/changelog.txt");
                        changelog = changelog.Substring(0, changelog.IndexOf("\n\n"));
                    }
                    catch
                    {
                        Log.Warn("更新日志获取失败");
                    }
                    if (!checkBeta && hasStable)
                    {
                        DialogResult res = MessageBox.Show($"发现新版本{asserts[stable].name}啦\r\n最近{changelog}\r\n\r\n马上更新嘛?", @"\(^o^)/更新啦", MessageBoxButtons.YesNo);
                        if (res == DialogResult.Yes)
                        {
                            StartDownload(asserts[stable]);
                        }
                        else
                        {
                            Log.Info("更新被取消");
                        }
                    }
                    else if(checkBeta && (hasBeta || hasStable))
                    {
                        DialogResult res = MessageBox.Show($"发现新版本{asserts[0].name}beta啦\r\n最近{changelog}\r\n\r\n马上更新嘛?", @"\(^o^)/更新啦", MessageBoxButtons.YesNo);
                        if (res == DialogResult.Yes)
                        {
                            StartDownload(asserts[0]);
                        }
                        else
                        {
                            Log.Info("更新被取消");
                        }
                    }
                    else
                    {
                        Log.Info("没有符合要求的更新");
                    }
                }
                else
                {
                    Log.Info("没有发现新版本");
                }

            }
            catch (Exception ex)
            {
                Log.Error("检查更新失败 - 解析json失败");
                Log.Debug(ex.Message);
            }
        }