public void OpenFile(string path)
{
var CsfClassFileBW = new Data.CsfBackgroundWorker <Kernel.CsfClassFile>();
FilePath = path;
var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
IsOpenedFile = false;
void finished(Data.CsfBackgroundWorker <Kernel.CsfClassFile> sender, Kernel.CsfClassFile result)
{
CsfClassFileBW.Finished -= finished;
CsfClassFileBW.PropertyChanged -= propChanged;
StatusBlock.Button.Click -= btnAct;
DataContext = new ViewModel.CsfDocument(result);
IsOpenedFile = true;
if (result != null)
{
StatusBlock.Hide();
}
};
void btnAct(object o, RoutedEventArgs e)
{
CsfClassFileBW.Finished -= finished;
CsfClassFileBW.PropertyChanged -= propChanged;
StatusBlock.Button.Click -= btnAct;
CsfClassFileBW.Cancel();
StatusBlock.TextBlock.Text = "用户已取消";
StatusBlock.HideProgressBar();
StatusBlock.HideButton();
fs.Close();
}
void propChanged(object o, System.ComponentModel.PropertyChangedEventArgs e)
{
switch (e.PropertyName)
{
case nameof(CsfClassFileBW.StatusString): // 字符串变更
lock (StatusBlock.TextBlock)
StatusBlock.TextBlock.Text = CsfClassFileBW.StatusString;
break;
case nameof(CsfClassFileBW.UnknowProgress): // 进度未知
if (CsfClassFileBW.UnknowProgress)
{
StatusBlock.ProgressBar.IsIndeterminate = true;
}
else // 已知
{
StatusBlock.ProgressBar.IsIndeterminate = false;
StatusBlock.ShowProgressBar();
StatusBlock.ProgressBar.Maximum = CsfClassFileBW.MaxProgress;
}
break;
case nameof(CsfClassFileBW.Progress): // 进度变更
lock (StatusBlock.ProgressBar)
StatusBlock.ProgressBar.Value = CsfClassFileBW.Progress;
break;
case nameof(CsfClassFileBW.Error): // 发生异常
if (CsfClassFileBW.Error is Exception exception)
{
CsfClassFileBW.Finished -= finished;
CsfClassFileBW.PropertyChanged -= propChanged;
StatusBlock.Button.Click -= btnAct;
lock (StatusBlock.TextBlock)
StatusBlock.TextBlock.Text = exception.Message;
StatusBlock.HideProgressBar();
StatusBlock.HideButton();
fs.Close();
}
break;
}
}
// 显示状态块
StatusBlock.Show(StatusBlock.Control.ProgressBar | StatusBlock.Control.TextBlock);
StatusBlock.ProgressBar.IsIndeterminate = true;
StatusBlock.TextBlock.Text = "正在读取中, 请稍候...";
StatusBlock.Button.Content = "取消";
StatusBlock.ShowButton();
StatusBlock.Button.Click += btnAct;
// 属性变更通知
CsfClassFileBW.PropertyChanged += propChanged;
// 任务完成
CsfClassFileBW.Finished += finished;
// 加载文件
CsfClassFileBW.BeginParse(fs);
}