压缩问题

PDF Office/Model/Dialog/ToolsDialogs/CompressDialogModel/CompressDialogModel.cs

@@ -58,6 +58,7 @@ namespace PDF_Master.Model.Dialog.ToolsDialogs
                 compressquality = e.Parameters.GetValue<int>("compressDialogModel.CompressQuality");
                 if (doc != null)
                 {
+                    
                     App.mainWindowViewModel.Value = 0;
                     App.mainWindowViewModel.ProgressTitle = "Compressing";
                     App.mainWindowViewModel.IsProcessVisible = System.Windows.Visibility.Visible;
@@ -66,11 +67,11 @@ namespace PDF_Master.Model.Dialog.ToolsDialogs
                     document.UnlockWithPassword(password);
                     indexDelegate += GetIndex;
                     compressingIntpr = document.CompressFile_Init(compressquality, indexDelegate);
-                    //GC.KeepAlive(indexDelegate);
+                    GC.KeepAlive(indexDelegate);//关键  防止委托过早回收
                     tempDocument = document;
                     Trace.WriteLine("compressDialogModel.CompressQuality" + compressquality);
                     App.mainWindowViewModel.ProcessCloseAction = CompressClear;
-                    if (await Task.Run<bool>(() => { return document.CompressFile_Start(compressingIntpr, filepath); })) { CommonHelper.ShowFileBrowser(filepath); }
+                    if (await Task.Run<bool>(() => { return document.CompressFile_Start(compressingIntpr, filepath); })) { CommonHelper.ShowFileBrowser(filepath);  }
 
                     document.Release();
                 }