C# 关于Winfrom 程序中出现 System.AccessViolationException 的求助

Question

发生了 System.AccessViolationException
  HResult=-2147467261
  Message=尝试读取或写入受保护的内存。这通常指示其他内存已损坏。
  Source=System.Windows.Forms
  StackTrace:
       在 System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       在 System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
       在 System.Windows.Forms.Control.DefWndProc(Message& m)
       在 System.Windows.Forms.Control.WndProc(Message& m)
       在 System.Windows.Forms.TextBoxBase.WndProc(Message& m)
       在 System.Windows.Forms.RichTextBox.WndProc(Message& m)
       在 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       在 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       在 System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       在 System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, Int32& wParam, Int32& lParam)
       在 System.Windows.Forms.TextBoxBase.GetSelectionStartAndLength(Int32& start, Int32& length)
       在 System.Windows.Forms.TextBoxBase.AppendText(String text)

Answer 1

当前使用方法，使用环境卫生 WIN10&VS2012 
   private void Port1ShowMSG(string strMessage)
        {
          try
            {

                {
                    if (strMessage != "")
                    {
                        strMessage += "\r\n";

                    }

                    if (grp1_RchShow.InvokeRequired)
                    {
                        grp1_RchShow.Invoke(new EventHandler(delegate
                        {
                            if (strMessage != null)
                            {
                                SystemError.SystemLog(m_strPortName[0], strMessage);

                                grp1_RchShow.AppendText(strMessage);


                                //grp1_RchShow.Select(grp1_RchShow.Text.Length, 0);
                                //grp1_RchShow.ScrollToCaret();



                            }
                        }));
                    }
                    else
                    {
                        SystemError.SystemLog(m_strPortName[0], strMessage);

                        grp1_RchShow.AppendText(strMessage);

                        //grp1_RchShow.Select(grp1_RchShow.Text.Length, 0);
                        //grp1_RchShow.ScrollToCaret();

                    }
                }
            }
            catch(Exception ex)
          {
              SystemError.SystemLog(m_strPortName[0], ex.Message);
           }

        }

还请各位大侠帮忙瞅瞅

                

Answer 2

Hi,

我这里找到了一个相关链接或许你可以参考一下，里面提出了多种可能的情况。

Attempted to read or write protected memory. This is often an indication that other memory is corrupt。

Regards,

Kyle

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