com下获取屏幕点取的点

zhengjian211

1.   private void 获取对象名称_Click(object sender, EventArgs e)
   
2. {
   
3. Microsoft.VisualBasic.Interaction.AppActivate(AcadApp.Caption);
   
4. object returnObj,pickPoint;
   
5. string pickPrompt = "选取物体对象!";
   
6. double[] pickPointArray;
   
7. AcadDoc.Utility.GetEntity(out returnObj, out pickPoint, pickPrompt);
   
8. AcadObject returnCADObj = (AcadObject)returnObj;
   
9. pickPointArray =(Double[])pickPoint;
   
10. MessageBox.Show("选取对象为：" + returnCADObj.ObjectName.ToString());
    
11. MessageBox.Show("点击位置：X=" + pickPointArray[0].ToString() + ",Y=" +
    
12. pickPointArray[1].ToString() + ",Z=" + pickPointArray[2].ToString());
    
13. Microsoft.VisualBasic.Interaction.AppActivate(this.Text);
    
14. }

  private void 获取对象名称_Click(object sender, EventArgs e)<br /> {<br /> Microsoft.VisualBasic.Interaction.AppActivate(AcadApp.Caption);<br /> object returnObj,pickPoint;<br /> string pickPrompt = "选取物体对象!";<br /> double[] pickPointArray;<br /> AcadDoc.Utility.GetEntity(out returnObj, out pickPoint, pickPrompt);<br /> AcadObject returnCADObj = (AcadObject)returnObj;<br /> pickPointArray =(Double[])pickPoint;<br /> MessageBox.Show("选取对象为：" + returnCADObj.ObjectName.ToString());<br /> MessageBox.Show("点击位置：X=" + pickPointArray[0].ToString() + ",Y=" +<br /> pickPointArray[1].ToString() + ",Z=" + pickPointArray[2].ToString());<br /> Microsoft.VisualBasic.Interaction.AppActivate(this.Text);<br /> }

书上的方法是这样的 但是当在屏幕空白处点击孤立点时就报错，请问如何获取屏幕空白处点选的点的坐标？

zhengjian211

已经解决
object nullpt = Type.Missing;   
            pickPointArray  =(double[]) AcadDoc.Utility.GetPoint( nullpt,"选择点");

sailorcwx

可以用try catch来捕捉错误吧