如何处理代码中的外部异常

本文关键字：外部 异常 代码 何处理 处理 | 更新日期: 2023-09-27 18:34:15

我正在尝试以计时器的数量捕获图像并自动保存它，我已经尝试了代码 但是当我运行此代码时，会抛出外部异常。如果我尝试捕获异常，代码会运行，但它既不会将捕获的图像保存在提到的路径中，也不会保存在其他任何地方。这里 picCap 是我的图片框的名称

我的代码是，

    WebCam webcam;
    int duration = 0;
    private void timer1_Tick(object sender, EventArgs e)
    {
        duration++;
        textBox1.Text = duration.ToString();
        bool ischecked = radioButton2.Checked;
            if (duration <= 3)
            {
                radioButton2.Checked = true;
                if (radioButton2.Checked == true)
                {

                    picCap.Image.Save(@"C:'Users'Administrator'Desktop", ImageFormat.Jpeg);
                   //External Exception not handled
                }
                else
                {
                    webcam.Stop();
                    timer1.Stop();
                }
            }
            else
            {
                radioButton2.Checked = false;
                //     radioButton3.Visible = false;
                radioButton3.Checked = true;
            }

    }
    //start
    private void button1_Click(object sender, EventArgs e)
    {
        timer1.Enabled = true;
        timer1.Start();
        webcam.Start();
    }
    //stop
    private void button2_Click(object sender, EventArgs e)
    {
        timer1.Stop();
        webcam.Stop();
    }
    private void mainWinForm_Load(object sender, EventArgs e)
    {
        webcam = new WebCam();
        webcam.InitializeWebCam(ref picCap);
    }

有关异常的其他详细信息

System.Runtime.InteropServices.ExternalException was unhandled by user code
HResult=-2147467259
Message=A generic error occurred in GDI+.
Source=System.Drawing
ErrorCode=-2147467259
 StackTrace:
   at System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams)
   at System.Drawing.Image.Save(String filename, ImageFormat format)
   at WindowsFormsApplication3.mainWinForm.timer1_Tick(Object sender, EventArgs e) in C:'Users'Administrator'documents'visual studio 2010'Projects'WindowsFormsApplication3'WindowsFormsApplication3'Form1.cs:line 37
   at System.Windows.Forms.Timer.OnTick(EventArgs e)
   at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   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.DoEvents()
   at WebCam_Capture.WebCamCapture.timer1_Tick(Object sender, EventArgs e)
 InnerException:

如何处理代码中的外部异常

异常指示该方法需要文件名而不是文件夹路径：

System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams)

它可能会失败，因为它无法在没有文件名的情况下保存文件，因此请尝试添加一个类似于以下示例的文件：

picCap.Image.Save(@"C:'Users'Administrator'Desktop'MyFilename.jpeg", ImageFormat.Jpeg);
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