首页 > 解决方案 > 在 C# 中显示启动画面的异常

问题描述

背景:几个月前,我得到了一个自由职业者编写的桌面应用程序的代码。此后,这位自由职业者关闭了他的账户。在过去的几天里,我一直在努力学习和破译已经编写的代码。我基本上是一个 C# 新手,并且正在用 Udemy C# 课程自学。

问题:当应用程序启动时,它显示一个启动画面。我可以在启动屏幕正确显示的发布模式下运行应用程序。但是在设置中勾选了公共语言运行时异常的调试模式下,我得到了一个异常。详情如下。

System.Threading.ThreadAbortException occurred
  HResult=-2146233040
  Message=Thread was being aborted.
  StackTrace:
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at CamCon.MainForm.StartSplash() in E:\Freelance\CamArd\App_C# (2020.03.04)\CamCon\MainForm.cs:line 289
  InnerException:

这些是相关的代码片段:

    public MainForm()
    {
        InitializeComponent();
        //show splash screen for 2.5seconds
        Thread t = new Thread(new ThreadStart(StartSplash));
        t.Start();
        Thread.Sleep(2500);
        t.Abort();
    }

和:

    private void StartSplash()
    {
        Application.Run(new SplashForm()); // Exception happens here. This is MainForm.cs:line 289
    }

和:

    namespace CameraControl
    {
        partial class SplashForm
        {
            private System.ComponentModel.IContainer components = null;
            protected override void Dispose(bool disposing)
            {
                if (disposing && (components != null))
                {
                    components.Dispose();
                }
                base.Dispose(disposing);
            }

            #region Windows Form Designer generated code

            /// <summary>
            /// Required method for Designer support - do not modify
            /// the contents of this method with the code editor.
            /// </summary>
            private void InitializeComponent()
            {
                this.pictureBox1 = new System.Windows.Forms.PictureBox();
                ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
                this.SuspendLayout();
                // 
                // pictureBox1
                // 
                this.pictureBox1.Image = global::CameraControl.Properties.Resources.splash;
                this.pictureBox1.Location = new System.Drawing.Point(0, 0);
                this.pictureBox1.Name = "pictureBox1";
                this.pictureBox1.Size = new System.Drawing.Size(600, 400);
                this.pictureBox1.TabIndex = 0;
                this.pictureBox1.TabStop = false;
                // 
                // SplashForm
                // 
                this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
                this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
                this.ClientSize = new System.Drawing.Size(600, 400);
                this.ControlBox = false;
                this.Controls.Add(this.pictureBox1);
                this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
                this.Name = "SplashForm";
                this.ShowIcon = false;
                this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
                this.Text = "SplashForm";
                ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
                this.ResumeLayout(false);

            }

            #endregion

            private System.Windows.Forms.PictureBox pictureBox1;
        }
    }

请求:任何人都可以帮助并建议我应该看什么,以纠正这个异常;这样它就不会在应用程序的其他地方回来咬我(而且我在其他地方也遇到了一些问题,但那是以后再说)?

提前谢谢了!

标签: c#

解决方案


SplashScreen.NET 有一个可以使用的内置类。文档可以在这里找到。

关于例外,这是设计使然。您正在调用Thread.Abort,并且通过逐字抛出一个ThreadAbortException. 不是什么好事。

Thread.Abort由于各种原因,我不会详细说明,在几乎所有情况下,使用都是一个糟糕的设计。但从表面上看,您可以看到简单地抛出异常并不是停止线程的干净方法。


推荐阅读