zj-Exercise/C#/CSharpCAD/AutoNum/Cmd.cs

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Colors;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.Windows;
using Autodesk.AutoCAD.Geometry;
using DotNetARX2014;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace AutoNum
{
    public class Cmd
    {
        //Demo1：CmdWIN
        [CommandMethod("CmdWIN")]
        public void CmdWIN()
        {    
            AutoNumForm form = new AutoNumForm();
            //将窗体以模态对话框的形式显示
            form.ShowDialog();
            //System.Windows.Forms.MessageBox.Show("Hello WinForm", "Info(Tips)");
        }

        public void ChangeNum(string strPre,int numLength,int startNum)
        {
            //获取当前文档
            Document doc = Application.DocumentManager.MdiActiveDocument;
            //从当前文档获取Database
            Database db = doc.Database;

            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                //获取单行文字
                var dbDBText = db.GetEntsInModelSpace<DBText>();
                var drawingNums = (from t in dbDBText
                                   //获取图号图层上的单行文字
                                   where t.Layer.Equals("图号")
                                   //进行排序，竖向降序，横向升序
                                   orderby t.Position.Y descending,t.Position.X ascending
                                   select t);

                //循环更改文字
                int count = startNum;
                foreach(var item in drawingNums)
                {
                    DBText text = trans.GetObject(item.ObjectId,OpenMode.ForWrite) as DBText;
                    text.TextString = strPre + count.ToString("D" + numLength);
                    //text.Color = Color.FromColorIndex(ColorMethod.ByColor,3);
                    count++;
                }

                trans.Commit();
            }
            
        }
    }
}