尝试运行OpenFileDialog代码时，C＃WinForms应用程序冻结。 [英] C# WinForms App freezes when trying to run OpenFileDialog code.

问题描述

我正在编写一个C＃WinForms应用程序（VS 2017 Pro v15.7.4），当我尝试运行以下代码时应用程序冻结：

I'm writing a C# WinForms app (VS 2017 Pro v15.7.4) and the app freezes when I try to run the code below:

private void btnAddVideo_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Congratulations! You just clicked the Add Video button!", "", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Title = "Add Video...";
            ofd.Filter = "Video (*.avi, *.mpg, *.mpeg, *.wmv)|*.avi;*.mpg;*.mpeg;*.wmv";
            if (DialogResult.OK == ofd.ShowDialog())
            {
                try
                {
                    glbvidVideo = Video.FromFile(ofd.FileName);
                    clsMessage.bytVideo = File.ReadAllBytes(ofd.FileName);
                    if (glbvidVideo.Size.Height > glbvidVideo.Size.Width)
                        pbVideo.Size = pbVideo.MaximumSize = glbszPortraitSize;
                    else if (glbvidVideo.Size.Width > glbvidVideo.Size.Height)
                        pbVideo.Size = pbVideo.MaximumSize = glbszLandscapeSize;
                    glbvidVideo.Owner = pbVideo;
                    btnRemoveVideo.Enabled = btnPlayVideo.Enabled = btnStopVideo.Enabled = 
                        clsMessage.blMediaPresent =  true;
                    clsMessage.strMediaType = "Video";
                }
                catch (Exception exVideoLoadError)
                {
                    MessageBox.Show(exVideoLoadError.ToString(), "oops.", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            ofd.Dispose();
        }

过去我曾多次编写此代码，但它总能顺利运行。 btnAddVideo单击事件处理程序已设置为在单击按钮时运行，我应该看到第一行代码生成的MessageBox，但我没有。相反，
整个应用程序只是冻结，我必须通过按Visual Studio中的"停止"按钮来关闭它。我不知道如何解决它。解决方案或Visual Studio中是否有需要修复的内容？

I've written this code many times in the past and it always ran without a hitch. The btnAddVideo click event handler has been set to run when the button is clicked and I should see the MessageBox generated by the first line of code, but I don't. Instead, the entire app just freezes and I have to close it by pressing the Stop button in Visual Studio. I'm at a loss as to how to fix it. Could there be something in the solution or Visual Studio that needs fixing?

推荐答案

这是在Win 10上发生的吗？

Is this happening on Win 10?

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