双击关联文件时，文件打不开，程序崩溃

Question

我在相关程序中打开文件时遇到了一个特殊问题。首先，我双击一个文件，单击“打开方式...”，然后单击进入程序项目文件中的 Debug 文件夹并运行可执行文件。这是为了模拟在与之关联的程序中打开文件，就好像该程序实际安装在我的计算机上一样。

这是 Program.cs 的完整代码：

namespace TriviaAuthor_v10
{
    static class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new frmSplashScreen());
            if (args.Length > 0)
                Application.Run(new frmMain(args[0]));
            else
                Application.Run(new frmMain());
        }
    }
}

下面是主窗体的两个构造函数的代码：

    public frmMain(string autoopenfilepath)
    {
        InitializeComponent();
        filepath = autoopenfilepath;
        OpenTheFile(filepath);
    }

    public frmMain()
    {
        InitializeComponent();
    }

这是打开文件的代码：

    private void OpenTheFile(string ThisFilePath)
    {
        // First we get the filename.
        filename = Path.GetFileName(ThisFilePath);
        FilenameSansExtension = Path.GetFileNameWithoutExtension(ThisFilePath);
        // Create a file stream.
        FileStream fs = new FileStream(ThisFilePath, FileMode.Open, FileAccess.Read);
        // Create the writer for data.
        BinaryReader br = new BinaryReader(fs);
        GameInfo.GameTitle = br.ReadString();
        GameInfo.GameAuthor = br.ReadString();
        GameInfo.DateCreated = br.ReadString();
        GameInfo.NumberOfQuestions = br.ReadInt32();
        GameInfo.TitlePageImagePresent = br.ReadBoolean();
        GameInfo.TitlePageImage = br.ReadString();
        GameInfo.IntroScreenAudioPresent = br.ReadBoolean();
        GameInfo.IntroScreenAudio = br.ReadString();
        GameInfo.FinalScoreAudioPresent = br.ReadBoolean();
        GameInfo.FinalScoreAudio = br.ReadString();
        GameInfo.ActiveQuestion = br.ReadInt32();

        if (GameInfo.NumberOfQuestions > 0)
        {
            for (int i = 0; i < GameInfo.NumberOfQuestions; i++)
            {
                clsQuestionClass Question = new clsQuestionClass();

                Question.NewQuestion = br.ReadString();
                Question.Points = br.ReadInt32();
                Question.QuestionType = br.ReadInt32();
                Question.QuestionImagePresent = br.ReadBoolean();
                Question.QuestionImage = br.ReadString();

                Question.QuestionAudioPresent = br.ReadBoolean();
                Question.QuestionAudio = br.ReadString();

                Question.IncludeTimer = br.ReadBoolean();
                Question.TimerTime = br.ReadInt32();
                Question.TickTock = br.ReadBoolean();

                Question.AIsChecked = br.ReadBoolean();
                Question.AnswerA = br.ReadString();
                Question.AIsCorrect = br.ReadBoolean();

                Question.BIsChecked = br.ReadBoolean();
                Question.AnswerB = br.ReadString();
                Question.BIsCorrect = br.ReadBoolean();

                Question.CIsChecked = br.ReadBoolean();
                Question.AnswerC = br.ReadString();
                Question.CIsCorrect = br.ReadBoolean();

                Question.DIsChecked = br.ReadBoolean();
                Question.AnswerD = br.ReadString();
                Question.DIsCorrect = br.ReadBoolean();

                Question.TrueOrFalse = br.ReadBoolean();

                Question.FillInBlankAnswer = br.ReadString();

                Question.AnswerResponseImagePresent = br.ReadBoolean();
                Question.AnswerResponseImage = br.ReadString(); ;
                Question.CorrectAnswerResponse = br.ReadString();
                Question.IncorrectAnswerResponse = br.ReadString();

                Question.CorrectAnswerResponseAudioPresent = br.ReadBoolean();
                Question.CorrectAnswerResponseAudio = br.ReadString();
                Question.IncorrectAnswerResponseAudioPresent = br.ReadBoolean();
                Question.IncorrectAnswerResponseAudio = br.ReadString();

                Questions.Add(Question);
                Questions.Count();
            }
        }
        fs.Close();
        br.Close();
        QuestionIndex = GameInfo.ActiveQuestion;
        LoadGameIntoGameGUI(Questions[QuestionIndex]);
        this.Text = "Trivia Author v1.0 - " + FilenameSansExtension;
        ProjectNeedsSaving = false;
        saveAsToolStripMenuItem.Enabled = closeprojecttoolStripMenuItem1.Enabled = exportgametoolStripMenuItem.Enabled =
        printToolStripMenuItem.Enabled = printPreviewToolStripMenuItem.Enabled = tsbtnProjectClose.Visible =
        ProjectIsOpen = saveToolStripMenuItem.Enabled = tsbtnSaveProject.Enabled = btnShowProjectReview.Enabled = true;

        UpdateGameSummary();
    }

注意：“OpenTheFile(string ThisFilePath)”用于使用 OpenFileDialog 打开文件，以及当我尝试通过双击打开文件时。

所以问题来了：当我在 Visual Studio 2013 中运行程序然后打开文件（使用 OpenFileDialog）时，文件打开时没有问题。但是，当我尝试通过双击该文件并使用程序的 Debug 文件夹中的可执行文件打开它时，我看到程序的启动画面，然后程序中止。它

在我看来，文件的路径正在正确地中继到“OpenTheFile()”。而且由于程序在 Visual Studio 之外运行，我没有收到任何错误消息，甚至来自操作系统。

Answer 1

让我们重新开始。您在应用程序的一开始就检查参数。如果它到达LoadGameIntoGameGUI() 并在那里粉碎（在读取文件之后），这意味着某些东西被传递给了程序。正如您提到的，您已经添加了一个消息框，我假设您现在运行了正确版本的程序，但您仍然有一个异常。它是完全相同的例外吗？如果是这样，您介意发布LoadGameIntoGameGUI 的代码吗？

顺便说一句，if 这里是不必要的，如果GameInfo.NumberOfQuestions==0 无论如何都会忽略循环：

 if (GameInfo.NumberOfQuestions > 0)
    {
        for (int i = 0; i < GameInfo.NumberOfQuestions; i++)

这些数字和问题是什么？你把其中一个传给LoadGameIntoGameGUI，你确定它是正确的吗？您可以添加日志文件并检查输入。 File.WriteAllText("your log.txt", question.ToString()); 之类的东西（确保 ToString 返回有意义的东西）。