xaml部分主要程式碼：
<Canvas x:Name="cvRuler" Margin="0" Background="WhiteSmoke" TextBlock.Foreground="Black"/>
後臺主要程式碼
1 //畫標尺 2 private void DrawRule() 3 { 4 5 if (cvRuler.Children != null) 6 { 7 cvRuler.Children.Clear(); 8 } 9 10 System.Windows.Shapes.Line _line; 11 TextBlock _textBlock; 12 13 var xScale =你的縮放倍數; 14 15 int _lineIndex = 0; 16 double _width = cvRuler.ActualWidth;//展示部分總pixel 17 string _unit = "(cm)"; 18 float _inch = (float)5195/600;//dpi為600時，對應總英寸 19 float _cm = (float)(_inch*2.54);//英寸換算成cm 20 double _pixelPerline = _width/_cm/10*xScale;//刻度尺每cm對應多少pixel。分成十份，再乘以縮放倍數 21 for (double i = 0; i < _width; i += _pixelPerline) 22 { 23 _line = new System.Windows.Shapes.Line(); 24 _line.X1 = i; 25 _line.X2 = i; 26 _line.Y1 = 0; 27 _line.StrokeThickness = 1; 28 if (_lineIndex % 10 == 0)//十份，最長的刻度線 29 { 30 _line.Stroke = Brushes.DimGray; 31 _line.Y2 = 25; 32 33 _textBlock = new TextBlock(); 34 _textBlock.Text = (_lineIndex/10).ToString()+(_lineIndex==0 ? _unit : ""); 35 _textBlock.FontSize = 8; 36 _textBlock.HorizontalAlignment = HorizontalAlignment.Left; 37 _textBlock.VerticalAlignment = VerticalAlignment.Top; 38 _textBlock.Margin = new Thickness(i+2, 20, 0, 0); 39 cvRuler.Children.Add(_textBlock); 40 } 41 else if (_lineIndex % 5 == 0)//中間的刻度線 42 { 43 _line.Stroke = Brushes.Gray; 44 _line.Y2 = 20; 45 } 46 else 47 { 48 _line.Stroke = Brushes.Gray; 49 _line.Y2 = 15; 50 } 51 cvRuler.Children.Add(_line); 52 53 _lineIndex++; 54 } 55 }