visio 画图
我第一次用代码画visio图形，不熟。想用代码在visio里画一个带有三个拐点的折线，但是画出来只有一个拐点，只有起止点跟第二个点，其他的都没有，请大侠指点。我的部分代码如下：
public void Line()
  {
  //long UndoScopeID2;
  //UndoScopeID2 = visApplication.BeginUndoScope("手动编辑");

  this.visApplication.Documents.OpenEx(@"F:\Data\Temp\绘图2.vsd", (short)Microsoft.Office.Interop.Visio.VisOpenSaveArgs.visOpenDocked + (short)Microsoft.Office.Interop.Visio.VisOpenSaveArgs.visOpenRO);
  Master master = visApplication.Documents[@"F:\Data\Temp\绘图2.vsd"].Masters.get_ItemU("Dynamic connector");
   
  // Master master = this.visApplication.ActiveDocument.Masters.get_ItemU("Dynamic connector");
   

  Microsoft.Office.Interop.Visio.Shape connector = this.visApplication.ActivePage.Drop(master, 0.0, 0.0);
  //TODO 坐标转换
  //设置如果两条线相交错开
  connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowShapeLayout, (short)VisCellIndices.visSLOConFixedCode).FormulaForceU = "3";
   
  //宽度
  //connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowXFormOut, (short)VisCellIndices.visXFormWidth).FormulaForceU = "GUARD(1.0433070866142)";
  ////高度
  //connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowXFormOut, (short)VisCellIndices.visXFormHeight).FormulaForceU = "GUARD(-0.80708661417323)";
  //设置起始点X轴坐标位置
  connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowXForm1D, (short)VisCellIndices.vis1DBeginX).FormulaForceU = "75 mm";//"57 mm";
  //设置起始点Y轴坐标位置
  connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowXForm1D, (short)VisCellIndices.vis1DBeginY).FormulaForceU = "140 mm";//"243.5 mm";
  //设置终点X轴坐标位置
  connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowXForm1D, (short)VisCellIndices.vis1DEndX).FormulaForceU = "125 mm";//"83.5 mm";
  //设置终点Y轴坐标位置
  connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowXForm1D, (short)VisCellIndices.vis1DEndY).FormulaForceU = "103.5 mm";//"213 mm";

  //connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowTextXForm, (short)VisCellIndices.visXFormPinX).FormulaForceU = "0.17339654204";

  //connector.get_CellsSRC((short)VisSectionIndices.visSectionObject, (short)VisRowIndices.visRowTextXForm, (short)VisCellIndices.visXFormPinX).FormulaForceU = "-0.99737991956634";
  //设置连接线
  connector.get_CellsSRC((short)VisSectionIndices.visSectionFirstComponent, 1, 0).FormulaForceU = "0";
  connector.get_CellsSRC((short)VisSectionIndices.visSectionFirstComponent, 1, 1).FormulaForceU = "0";
  connector.get_CellsSRC((short)VisSectionIndices.visSectionFirstComponent, 2, 0).FormulaForceU = "0.59055118110236";
  connector.get_CellsSRC((short)VisSectionIndices.visSectionFirstComponent, 2, 1).FormulaForceU = "-0.71850393700787";
  connector.get_CellsSRC((short)VisSectionIndices.visSectionFirstComponent, 3, 0).FormulaForceU = "-8.8817841970013e-16";