录屏 画板功能。

XHWK.WKTool/PracticeWindow.xaml.cs

         }
         public void Initialize(string _imgPath)
         {
-            if(File.Exists(_imgPath))
+            blackboard_canvas.Strokes.Clear();
+            //blackboard_canvas.EditingMode = InkCanvasEditingMode.EraseByStroke;
+            if (File.Exists(_imgPath))
             {
                 imgCanvas.Source = new BitmapImage(new Uri(_imgPath));
             }

XHWK.WKTool/ScreenRecordingToolbarWindow.xaml.cs

             blackboard_canvas.DefaultDrawingAttributes = drawingAttributes;
             drawingAttributes.FitToCurve = true;
             //隐藏画笔工具栏
-            BtnToolbarDown_Click(null, null);
+            //BtnToolbarDown_Click(null, null);
+            gridToolbar.Visibility = Visibility.Hidden;
+            gridColour.Visibility = Visibility.Hidden;
+            gridThickness.Visibility = Visibility.Hidden;
         }
         #endregion
 
             gridToolbar.Visibility = Visibility.Hidden;
             gridColour.Visibility = Visibility.Hidden;
             gridThickness.Visibility = Visibility.Hidden;
+            APP.W_PracticeWindow.Hide();
         }
         /// <summary>
         /// 画笔点击事件
                     //practiceWin.Owner = this;
                 }
                 APP.W_PracticeWindow.Initialize(imagePath);
-                APP.W_PracticeWindow.ShowDialog();
+                APP.W_PracticeWindow.Show();
             }
             catch (Exception ex)
             {