Question

我正在使用C＃并使用YouTube V3 API。我试图在视频中插入注释但是每当我收到"{"Object reference not set to an instance of an object."}"的异常时，只要我运行类似于上面代码的任何内容，就会发生这种情况：

public void AddComment()
{
    CommentThread commentToAdd = new CommentThread();
    commentToAdd.Snippet.IsPublic = true;
    commentToAdd.Snippet.TopLevelComment.Snippet.TextOriginal = "Test";
    commentToAdd.Snippet.VideoId = "kc-LBxBcyG8";
    commentToAdd.Snippet.TopLevelComment.Snippet.VideoId = "kc-LBxBcyG8";
    CommentThreadsResource.InsertRequest ins = JKYouTube.NewYouTubeService().CommentThreads.Insert(commentToAdd, "snippet");
    var insertedComment = ins.Execute();
}

我将此与Google资源管理器进行比较并使用相同的属性，并且浏览器实际上会在我的程序失败时添加注释。 https://developers.google.com/youtube/v3/docs/commentThreads/insert

一旦到达第二行代码 commentToAdd.Snippet.IsPublic = true;

只会错误并继续上面的每一行。

非常感谢任何帮助。

Answer 1

您的问题在于Snippet是null。

取自您提供的API link，您需要先创建一个CommentSnippet。

在Google提供的示例中：

// Insert channel comment by omitting videoId.
// Create a comment snippet with text.
CommentSnippet commentSnippet = new CommentSnippet();
commentSnippet.setTextOriginal(text);

首先，使用一些文本创建CommentSnippet，然后我们创建顶级评论：

// Create a top-level comment with snippet.
Comment topLevelComment = new Comment();
topLevelComment.setSnippet(commentSnippet);

然后，您将topLevelComment添加到CommentThreadSnippet：

// Create a comment thread snippet with channelId and top-level
// comment.
CommentThreadSnippet commentThreadSnippet = new CommentThreadSnippet();
commentThreadSnippet.setChannelId(channelId);
commentThreadSnippet.setTopLevelComment(topLevelComment);

当您最终拥有CommentThreadSnippet时，可以将其添加到CommentThread：

// Create a comment thread with snippet.
CommentThread commentThread = new CommentThread();
commentThread.setSnippet(commentThreadSnippet);

遵循这些步骤不应该给你一个NRE

Answer 2

非常感谢你的帮助。管理完成它。

async Task AddVideoCommentAsync(string commentToAdd, string videoID)
    {
        CommentSnippet commentSnippet = new CommentSnippet();
        commentSnippet.TextOriginal = commentToAdd;

        Comment topLevelComment = new Comment();
        topLevelComment.Snippet = commentSnippet;

        CommentThreadSnippet commentThreadSnippet = new CommentThreadSnippet();
        commentThreadSnippet.VideoId = videoID;
        commentThreadSnippet.TopLevelComment = topLevelComment;

        CommentThread commentThread = new CommentThread();
        commentThread.Snippet = commentThreadSnippet;

        var youtubeService = await NewYouTubeService();
        CommentThreadsResource.InsertRequest insertComment = youtubeService.CommentThreads.Insert(commentThread, "snippet");

        await insertComment.ExecuteAsync();
    }

C＃使用YouTube V3 API添加评论

2 个答案: