当我去调用我的加载器表单的新实例时，我的程序出现了这个令人讨厌的错误。
此表单的功能是从前一个表单中获取文件列表，并允许根据按下的热键加载每个文件。
我无法理解为什么我得到Handler异常，因为处理程序在private System.ComponentModel.IContainer components = null;文件中分配到.Designer.cs。之后它会引发异常。我已经做了很多在线搜索，我倾向于提出的关于这个例外的内存问题。我没有任何证据表明这一点;我很难过。
这是类代码：
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vlc);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
private BackgroundWorker documentHandler;
private readonly List<string> files;
private bool wait;
private readonly string fileDirectory;
private string previousFile;
private string currentFile;
private string nextFile;
private int position;
//Form Constructor
public FileLoader(string directory, string[] filesToLoad)
{
this.InitializeComponent();
files = new List<string>();
this.files.AddRange(filesToLoad);
this.fileDirectory = directory;
}
//WorkerSetup
public void WorkerSetup()
{
documentHandler = new BackgroundWorker();
documentHandler.DoWork += documentHandler_DoWork;
documentHandler.RunWorkerCompleted += documentHandler_RunWorkerCompleted;
this.HotKeyManager(true);
this.FileManager(null);
documentHandler.RunWorkerAsync(files[0]);
}
//ActionMethods
protected override void WndProc(ref Message m)
{
if (m.Msg == 0x0312)
{
int id = m.WParam.ToInt32();
if (id == 1)
{
this.FileManager(false);
wait = false;
}
if (id == 2)
{
this.FileManager(true);
wait = false;
}
if (id == 3)
{
documentHandler.CancelAsync();
}
}
this.PreProcessMessage(ref m);
}
private void HotKeyManager(bool register)
{
var regUnreg = register ? 1 : 2;
switch (regUnreg)
{
case 1:
RegisterHotKey(this.Handle, 1, 0x0004, 0x25); //Left Key
RegisterHotKey(this.Handle, 2, 0x0004, 0x27); //Right Key
RegisterHotKey(this.Handle, 3, 0x0004, 0x1B); //Esc Key
break;
case 2:
UnregisterHotKey(this.Handle, 1);
UnregisterHotKey(this.Handle, 2);
UnregisterHotKey(this.Handle, 3);
break;
}
}
private void FilePosition()
{
if (position <= 0)
{
this.position = 0;
this.previousFile = files[position];
this.currentFile = files[position];
this.nextFile = files[position + 1];
}
else if (position == files.Count)
{
this.previousFile = files[position - 1];
this.currentFile = files[position];
this.nextFile = files[position];
documentHandler.CancelAsync();
}
else
{
this.previousFile = files[position - 1];
this.currentFile = files[position];
this.nextFile = files[position + 1];
}
}
private void SetupLabels()
{
labelPrevious.Text = string.IsNullOrEmpty(this.previousFile) ? "On First" : previousFile;
labelCurrent.Text = string.IsNullOrEmpty(this.currentFile) ? "Error" : previousFile;
labelNext.Text = string.IsNullOrEmpty(this.nextFile) ? "On Last" : previousFile;
}
//Controller
private void FileManager(bool? increment)
{
if (increment == true)
{
position++;
}
else if (increment == false)
{
position--;
}
this.FilePosition();
this.SetupLabels();
}
//Workers
private void documentHandler_DoWork(object sender, DoWorkEventArgs e)
{
var adobeProcessInfo = new ProcessStartInfo("Acrobat.exe", this.fileDirectory + "\\" + currentFile + ".pdf");
var adobeProcess = new Process { StartInfo = adobeProcessInfo };
adobeProcess.Start();
while (wait)
this.SetupLabels();
}
private void documentHandler_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Error != null)
{
MessageBox.Show(e.Error.Message, "Error");
}
this.HotKeyManager(false);
this.Close();
}
这里是堆栈输出：
PDFInformationExtraction.exe！PDFInformationExtraction.FileLoader.HotKeyManager（bool register）第85行C＃ PDFInformationExtraction.exe！PDFInformationExtraction.FileLoader.WorkerSetup（）第47行+ 0xd字节C＃ PDFInformationExtraction.exe！PDFInformationExtraction.FormExtract.ButtonLoaderClick（object sender，System.EventArgs e）第122行+ 0xa字节C＃ System.Windows.Forms.dll！System.Windows.Forms.Control.OnClick（System.EventArgs e）+ 0x7f bytes
System.Windows.Forms.dll！System.Windows.Forms.Button.OnClick（System.EventArgs e）+ 0xa2 bytes
System.Windows.Forms.dll！System.Windows.Forms.Button.OnMouseUp（System.Windows.Forms.MouseEventArgs mevent）+ 0xac bytes System.Windows.Forms.dll！System.Windows.Forms.Control.WmMouseUp（ref System.Windows.Forms.Message m，System.Windows.Forms.MouseButtons button，int clicks）+ 0x2d1 bytes System.Windows.Forms.dll！System.Windows.Forms.Control.WndProc（ref System.Windows.Forms.Message m）+ 0x93a bytes System.Windows.Forms.dll！System.Windows.Forms.ButtonBase.WndProc（ref System.Windows.Forms.Message m）+ 0x127 bytes
System.Windows.Forms.dll！System.Windows.Forms.Button.WndProc（ref System.Windows.Forms.Message m）+ 0x20 bytes
System.Windows.Forms.dll！System.Windows.Forms.Control.ControlNativeWindow.OnMessage（ref System.Windows.Forms.Message m）+ 0x13 bytes
System.Windows.Forms.dll！System.Windows.Forms.Control.ControlNativeWindow.WndProc（ref System.Windows.Forms.Message m）+ 0x31 bytes
System.Windows.Forms.dll！System.Windows.Forms.NativeWindow.DebuggableCallback（System.IntPtr hWnd，int msg，System.IntPtr wparam，System.IntPtr lparam）+ 0x64 bytes [原产于管理过渡]
[管理到原生过渡]
System.Windows.Forms.dll！System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop（System.IntPtr dwComponentID，int reason，int pvLoopData）+ 0x287 bytes
System.Windows.Forms.dll！System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner（int reason，System.Windows.Forms.ApplicationContext context）+ 0x16c bytes
System.Windows.Forms.dll！System.Windows.Forms.Application.ThreadContext.RunMessageLoop（int reason，System.Windows.Forms.ApplicationContext context）+ 0x61 bytes
System.Windows.Forms.dll！System.Windows.Forms.Application.Run（System.Windows.Forms.Form mainForm）+ 0x31 bytes
PDFInformationExtraction.exe！PDFInformationExtraction.Program.Main（）第18行+ 0x1d字节C＃ [原产于管理过渡]
[管理到原生过渡]
mscorlib.dll！System.AppDomain.ExecuteAssembly（string assemblyFile，System.Security.Policy.Evidence assemblySecurity，string [] args）+ 0x6d bytes
Microsoft.VisualStudio.HostingProcess.Utilities.dll！Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly（）+ 0x2a bytes
mscorlib.dll！System.Threading.ThreadHelper.ThreadStart_Context（对象状态）+ 0x63字节
mscorlib.dll！System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state，bool ignoreSyncCtx）+ 0xb0 bytes
mscorlib.dll！System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state）+ 0x2c bytes
mscorlib.dll！System.Threading.ThreadHelper.ThreadStart（）+ 0x44 bytes
[原生于管理过渡]
修改 结果我的方法来监听热键格式错误：
this.PreProcessMessage(ref m);应该是base.WndProc(ref m);