如何将代码 YouTube API 从控制台转换为 WPF [关闭]

Posted 2023-02-24

【中文标题】如何将代码 YouTube API 从控制台转换为 WPF [关闭]

【英文标题】：How to convert code YouTube API from Console to WPF [closed]

【发布时间】：2021-11-17 20:05:12

【问题描述】：

我的代码在控制台中运行良好，但我尝试将其转换为 WPF c#，但没有成功。 我尝试将每个部分移植到 WPF，当我将其转换为 WPF 时，我发现了下面的代码（我在下面引用的第二个代码）它不起作用 请帮我。如何在 WPF c# 中正常工作 这是我的代码：

    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Reflection;
    using System.Threading;
    using System.Threading.Tasks;
    
    using Google.Apis.Auth.OAuth2;
    using Google.Apis.Services;
    using Google.Apis.Upload;
    using Google.Apis.Util.Store;
    using Google.Apis.YouTube.v3;
    using Google.Apis.YouTube.v3.Data;
    
    namespace ConsoleApp2
    
        
        internal class PlaylistUpdates
        
            public string PrivacyStatus  get; private set; 
    
            [STAThread]
            static void Main(string[] args)
            
                Console.WriteLine("YouTube Data API: Playlist Updates");
                Console.WriteLine("==================================");
    
                try
                
                     //new PlaylistUpdates().Run().Wait();
                    //new PlaylistUpdates().RunUpload().Wait();
                    new PlaylistUpdates().Editvideo().Wait();
                    
                
                catch (AggregateException ex)
                
                    foreach (var e in ex.InnerExceptions)
                    
                        Console.WriteLine("Error: " + e.Message);
                    
                
    
                Console.WriteLine("Press any key to continue...");
                Console.ReadKey();
            

            private async Task Editvideo()
            
                UserCredential credential;
                using (var stream = new FileStream("client_secrets.json", FileMode.Open, FileAccess.Read))
                
                    credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
                        GoogleClientSecrets.Load(stream).Secrets,
                        // This OAuth 2.0 access scope allows for read-only access to the authenticated 
                        // user's account, but not other types of account access.
                        new[]  YouTubeService.Scope.YoutubeReadonly ,
                        "user",
                        CancellationToken.None,
                        new FileDataStore(this.GetType().ToString())
                    );
                
    
                var youtubeService = new YouTubeService(new BaseClientService.Initializer()
                
                    HttpClientInitializer = credential,
                    ApplicationName = this.GetType().ToString()
                );
    
                var channelsListRequest = youtubeService.Channels.List("contentDetails");
                channelsListRequest.Mine = true;
    
                // Retrieve the contentDetails part of the channel resource for the authenticated user's channel.
                var channelsListResponse = await channelsListRequest.ExecuteAsync();
    
                foreach (var channel in channelsListResponse.Items)
                
                    // From the API response, extract the playlist ID that identifies the list
                    // of videos uploaded to the authenticated user's channel.
                    var uploadsListId = channel.ContentDetails.RelatedPlaylists.Uploads;
    
                    Console.WriteLine("Videos in list 0", uploadsListId);
    
                    var nextPageToken = "";
                    while (nextPageToken != null)
                    
                        var playlistItemsListRequest = youtubeService.PlaylistItems.List("snippet,status");
                        playlistItemsListRequest.PlaylistId = uploadsListId;
                        playlistItemsListRequest.MaxResults = 50;
                        playlistItemsListRequest.PageToken = nextPageToken;
    
                        // Create a new, private playlist in the authorized user's channel.
                        var newVideo = new Video();
                        newVideo.Snippet = new VideoSnippet();
                        newVideo.Id = "6obQQde1X3A";
                        newVideo.Snippet.Title = "My Title";
                        newVideo.Snippet.Description = "My Description";
                        newVideo.Snippet.Tags = new string[]  "tag 1", "tag 2", "tag 3" ;
                        newVideo.Snippet.CategoryId = "22";
                        newVideo.Status = new VideoStatus();
                        newVideo.Status.PrivacyStatus = "public";
                        newVideo = await youtubeService.Videos.Update(newVideo,"Id,snippet,status").ExecuteAsync();
    
                        Console.WriteLine("Change video details OK ....");
     
                        // Retrieve the list of videos uploaded to the authenticated user's channel.
                        var playlistItemsListResponse = await playlistItemsListRequest.ExecuteAsync();
    
                        foreach (var playlistItem in playlistItemsListResponse.Items)
                        
                        Console.WriteLine("0 (1)", playlistItem.Snippet.Title, playlistItem.Snippet.ResourceId.VideoId);
                        
    
                        nextPageToken = playlistItemsListResponse.NextPageToken;
                    
                
            
    
    
    

如果我在下面删除此代码。效果很好！

// Create a new, private playlist in the authorized user's channel.
                        var newVideo = new Video();
                        newVideo.Snippet = new VideoSnippet();
                        newVideo.Id = "6obQQde1X3A";
                        newVideo.Snippet.Title = "My Title";
                        newVideo.Snippet.Description = "My Description";
                        newVideo.Snippet.Tags = new string[]  "tag 1", "tag 2", "tag 3" ;
                        newVideo.Snippet.CategoryId = "22";
                        newVideo.Status = new VideoStatus();
                        newVideo.Status.PrivacyStatus = "public";
                        newVideo = await youtubeService.Videos.Update(newVideo,"Id,snippet,status").ExecuteAsync();
    
                        Console.WriteLine("Change video details OK ....");

这是我在 WPF 中的代码

 private async Task Change_VideoDetails()
    
        UserCredential credential;
        using (var stream = new FileStream("client_secrets.json", FileMode.Open, FileAccess.Read))
        
            credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                new[]  YouTubeService.Scope.YoutubeReadonly ,
                "user",
                CancellationToken.None,
                new FileDataStore(this.GetType().ToString())
            );
        

        var youtubeService = new YouTubeService(new BaseClientService.Initializer()
        
            HttpClientInitializer = credential,
            ApplicationName = this.GetType().ToString()
        );
        var channelsListRequest = youtubeService.Channels.List("contentDetails");
        channelsListRequest.Mine = true;
        // Retrieve the contentDetails part of the channel resource for the authenticated user's channel.
        var channelsListResponse = await channelsListRequest.ExecuteAsync();

        foreach (var channel in channelsListResponse.Items)
        
            // From the API response, extract the playlist ID that identifies the list
            // of videos uploaded to the authenticated user's channel.
            var uploadsListId = channel.ContentDetails.RelatedPlaylists.Uploads;

            //Console.WriteLine("Videos in list 0", uploadsListId);

            var nextPageToken = "";
            while (nextPageToken != null)
            
                var playlistItemsListRequest = youtubeService.PlaylistItems.List("Id,snippet,status");
                playlistItemsListRequest.PlaylistId = uploadsListId;
                playlistItemsListRequest.MaxResults = 50;
                playlistItemsListRequest.PageToken = nextPageToken;

                 var newVideo = new Video();
                newVideo.Snippet = new VideoSnippet();
                newVideo.Id = "6obQQde1X3A";
                txtLog.AppendText("\nWill change video details....." + newVideo.Id + );
                txtLog.ScrollToEnd();

                newVideo.Snippet = new VideoSnippet();
                newVideo.Id = "6obQQde1X3A";
                newVideo.Snippet.Title = "My Title";
                newVideo.Snippet.Description = "My Description";
                newVideo.Snippet.Tags = new string[]  "tag 1", "tag 2", "tag 3" ;
                newVideo.Snippet.CategoryId = "22";
                newVideo.Status = new VideoStatus();
                newVideo.Status.PrivacyStatus = "public";
                newVideo = await youtubeService.Videos.Update(newVideo, "Id,snippet,status").ExecuteAsync();

                txtLog.AppendText("\nChanged video details ....." + newVideo.Id);
                txtLog.ScrollToEnd();

                // Retrieve the list of videos uploaded to the authenticated user's channel.
                var playlistItemsListResponse = await playlistItemsListRequest.ExecuteAsync();
                int line_count=0;
                foreach (var playlistItem in playlistItemsListResponse.Items)
                
                    
                    line_count += 1;
                    if (line_count == int.Parse(txtVideonumber.Text))
                    
                        break;
                    


                    //   

                

                nextPageToken = playlistItemsListResponse.NextPageToken;
            
        
    

我使用下面的代码来运行上面的代码：

private void BtnChange_Click(object sender, RoutedEventArgs e)
    
        Change_VideoDetails();
    

我尝试运行调试器，但我的代码在以下代码处停止：

 newVideo = await youtubeService.Videos.Update(newVideo, "Id,snippet,status").ExecuteAsync();

我不明白为什么它会停止？请帮我解决一下

【问题讨论】：

请您扩展“不起作用” - 有什么问题？有编译错误吗？

我没有收到编译器错误。我只是没有看到这段代码的执行：var newVideo = new Video(); newVideo.Snippet = new VideoSnippet(); newVideo.Id = "6obQQde1X3A"; newVideo.Snippet.Title = "My Title"; ... Console.WriteLine("Change video details OK ...."); 非常感谢。

wpf 代码在哪里？您询问了您的 wpf 代码不起作用但仅发布了控制台应用程序。

您应该运行调试器以查看执行在哪一行停止 - 如果它停止。

我的问题已被编辑。请检查它帮助我。感谢任何想法来解决我的问题

【参考方案1】：

你必须await一个异步方法，即awaitTask结果：

// Since this is an event handler 'async void' is allowed. 
// Otherwise you must use 'async Task' or 'async Task<T>'
private async void BtnChange_Click(object sender, RoutedEventArgs e)

  await Change_VideoDetails();

等待Task 对于允许正确的异​​常处理/行为很重要。如果你不 await a Task 那么异常将不会正确传播 - 异常将被吞没。这是因为在async 方法中，异常被捕获并放置在Task 对象上。当您 await Task 时，您允许执行传播到调用者的上下文以最终保存您的应用程序或在 catch 块中处理。

对于无法访问您的环境（包括 Youtube 帐户和身份验证配置）的人来说，您的问题很难解决。

首先确保您的调试器将通过至少启用所有 CLR 异常来中断所有异常：在主菜单中选择 Debug/Windows/Exception Setting 并检查 “Common Language Runtime例外” 复选框。

如果调试器仍然没有抛出异常，则删除ExecuteAsync()以同步执行操作。这样您就可以测试是否遇到死锁。说到 async/await，您必须知道控制台应用程序、Asp.Net 和 Winforms/Wpf/UWP 在某些方面具有不同的行为。

【讨论】：

我已经解决了我的问题。感谢您对使用 async 和 await 的建议。我查看了 YouTube API 文档，发现问题出在以下代码中：new[] YouTubeService.Scope.YoutubeReadonly ,。我已将 Scope. 从 YoutubeReadonly 更改为 Youtubepartner 并且效果很好。非常感谢