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我是一个初学者，不懂编程，也不懂arx，最近才开始学C#.net + ARX开发CAD，刚作出一个小程序，与初学的交流一下，也请高手帮我完善一下，因我我没有加异常处理^_^，加了老是“并非所有代码路径都返回值”的错误，所以删了~~~希望谁能帮我改写一下，程序如下：
using System ;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Collections.Specialized;
using Autodesk..Runtime ;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.ApplicationServices;
//using Autodesk.AutoCAD.Colors;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.EditorInput;
[assembly: CommandClass(typeof(ClassLibrary.MyClass))]
namespace ClassLibrary
{
///
/// Summary description for MyClass.
///
public class MyClass
{
public MyClass()
{
//
// TODO: Add constructor logic here
//
}
static public ObjectId CreateLayer()
{
ObjectId layerId; //它返回函数的值
Database db = HostApplicationServices.WorkingDatabase;
Transaction trans = db.TransactionManager.StartTransaction();
//首先取得层表……
LayerTable lt = (LayerTable)trans.GetObject(db.LayerTableId, OpenMode.ForWrite);
//检查EmployeeLayer层是否存在……
if (lt.Has("LAJ"))
{
layerId = lt["LAJ"];
}
else
{
//如果EmployeeLayer层不存在，就创建它
LayerTableRecord ltr = new LayerTableRecord();
ltr.Name = "LAJ"; //设置层的名字
ltr.Color = Autodesk.AutoCAD.Colors.Color.FromColorIndex(Autodesk.AutoCAD.Colors.ColorMethod.ByAci, 1);
layerId = lt.Add(ltr);
trans.AddNewlyCreatedDBObject(ltr, true);
}
trans.Commit();
trans.Dispose();
return layerId;
}
static public Point3dCollection InputCoo()
{
 oint3dCollection point3dCollection = new Point3dCollection();
System.Windows.Forms.OpenFileDialog openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog1.InitialDirectory = @"D:\Documents and Settings\muli\My Documents\";
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
openFileDialog1.FilterIndex = 1;
openFileDialog1.RestoreDirectory = true ;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
StreamReader sr = new StreamReader(openFileDialog1.FileName,System.Text.Encoding.Default);
string [] sLine = null;
ArrayList arrText = new ArrayList();
// string delimStr = ",,,";
// char [] delimiter = delimStr.ToCharArray();
while (sr.Peek() != -1)
{
string aa = sr.ReadLine();
string delimStr = " ,";
char [] delimiter = delimStr.ToCharArray();
sLine = aa.Split(delimiter);
for (int i = 0; i
}
另，坐标文件的格式如下：
1,X,Y
2,X,Y
3,x,Y
......
其中，分隔符可以是“,”，或者空格。
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