Control the AutoCAD Environment

控制AutoCAD环境

This chapter describes the fundamentals for developing an application that runs in-process with AutoCAD. It explains many of the concepts to control and work effectively with the AutoCAD environment.

本章是开发AutoCAD进程内应用程序的基础，将学习到控制和使用AutoCAD环境的许多概念。

Topics in this section

本章主要内容

• Control the Application Window 控制应用程序窗口

• Control the Drawing Windows 控制图形窗口 Create,Open,Save,and Close Drawings 创建、打开、保存和关闭图形 Lock and Unlock a Document 锁定和解锁文档 Set AutoCAD Preferences 设置AutoCAD选项 Set and Return System Variables 设置和返回系统变量 Draw with Precision 精确制图 Prompt for User Input 提示用户输入 Access the AutoCAD Command Line访问AutoCAD命令行

Control the Application Window

控制应用程序窗口The ability to control the Application window allows developers the flexibility to create effective and intelligent applications. There will be times when it is appropriate for your application to minimize the AutoCAD window,perhaps while your code is performing work in another application such as Microsoft^® Excel^®. Additionally,you will often want to verify the state of the AutoCAD window before performing such tasks as prompting for input from the user.

控制AutoCAD应用程序窗口的能力让开发人员可以灵活地创建高效智能的应用程序。比如有时我们需要在程序中适时地最小化AutoCAD窗口，也许此时我们的代码正在使用其他应用程序如Excel处理任务。又比如，我们在执行像提示用户输入这样的任务前，经常需要确认AutoCAD窗口的状态。Using methods and properties found on the Application object,you can change the position,size,and visibility of the Application window. You can also use the WindowState property to minimize,maximize,and check the current state of the Application window.

使用Application对象的方法和属性，我们可以改变Application窗口的位置、大小及可见性，还可以用WindowState属性来最小化、最大化Application窗口，以及检查Application窗口的当前状态等。

This example uses the Location and Size properties to position the AutoCAD Application window in the upper-left corner of the screen and size it to 400 pixels wide by 400 pixels high.

本例使用Location属性和Size属性将AutoCAD应用窗口定位于屏幕左上角，并将窗口大小设置为400×400像素。

Note The following examples require that the PresentationCore (PresentationCore.dll) library to be referenced to the project. Use the Add Reference dialog Box and select PresentationCore from the .NET tab.

注意：下列示例需要在项目中引用PresentationCore库（PresentationCore.dll）。从添加引用对话框的.NET选项页中选PresentationCore即可。

VB.NET

Imports System.Drawing

Imports Autodesk.AutoCAD.Runtime

Imports Autodesk.AutoCAD.ApplicationServices

<CommandMethod("PositionApplicationWindow")> _

Public Sub PositionApplicationWindow()

'' Set the position of the Application window

Dim ptApp As Point = New Point(0,0)

Application.MainWindow.Location = ptApp

'' Set the size of the Application window

Dim szApp As Size = New Size(400,400)

Application.MainWindow.Size = szApp

End Sub

C#

using System.Drawing;

using Autodesk.AutoCAD.Runtime;

using Autodesk.AutoCAD.ApplicationServices;

[CommandMethod("PositionApplicationWindow")]

public static void PositionApplicationWindow()

{

// Set the position of the Application window

// 设置应用程序窗口位置

Point ptApp = new Point(0,0);

Application.MainWindow.Location = ptApp;

// Set the size of the Application window

// 设置应用程序窗口大小

Size szApp = new Size(400,400);

Application.MainWindow.Size = szApp;

}

VBA/ActiveX Code Reference

Sub PositionApplicationWindow()

'' Set the position of the Application window

ThisDrawing.Application.WindowTop = 0

ThisDrawing.Application.WindowLeft = 0

'' Set the size of the Application window

ThisDrawing.Application.width = 400

ThisDrawing.Application.height = 400

End Sub