C# 二次开发cad获取鼠标点击坐标

以下是C#二次开发CAD获取鼠标点击坐标的示例：

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using System;

namespace GetMousePoint
{
    public class Commands
    {
        [CommandMethod("GetMousePoint")]
        public void GetMousePoint()
        {
            Document doc = Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;

            // 获取鼠标点击点
            PromptPointOptions ppo = new PromptPointOptions("\n选择点: ");
            PromptPointResult ppr = ed.GetPoint(ppo);
            if (ppr.Status != PromptStatus.OK) return;

            Point3d pt = ppr.Value;

            ed.WriteMessage("\nX坐标:{0}, Y坐标:{1}, Z坐标:{2}", pt.X, pt.Y, pt.Z);
        }
    }
}

上述代码中，通过 `ed.GetPoint` 方法获取鼠标点击点，然后通过 `PromptPointResult` 的 `Value` 属性获取点的坐标。最后，将获取到的坐标打印到命令行窗口中。