原链接:http://www.cnblogs.com/sashow/archive/2005/09/26/244426.html
在做 web 项目的时候,我一直在用 web.config ,觉得这个东西实在不错。偶然间发现,原来 winform 项目也有一个类似于 web.config 的文件——app.config,和呵,不胜欣喜!
一、添加app.config
方法一:手工添加
要添加这个文件很简单,执行如下操作就可以了:在开发环境中选择“项目”——>“添加新项”——>“XML 文件”,输入xml 文件的名称为 app.config。
然后就可以如同 web.config 一样,编辑 app.config 文件,以及在应用程序中读、写该配置文件。
重新编译项目,在应用程序的运行目录下会生成一个 app.config 的副本,名称为:程序名.exe.config。
方法二:系统自动添加
假设我们现在要使用 app.config 来动态配置一个 label 的 text 属性,那么,在label的属性窗口中选择如下图的属性进行配置,那么就可以让系统自动添加一个 app.config 的文件,呵呵,很省事的了。
二、编辑和使用app.config
1、增加自定义的键值
这个当然是增加<appSettings>标签了。下面给个例子:
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根据应用的需要,我们可以添加许多需要动态配置的信息,如数据库连接字符串等。
2、编辑系统原有的属性
在下面的代码中,我配置了系统调试信息,这个东西挺不错的,可以将系统运行时输出的调试信息放置到一个文件。在我们使用 try ... catch 的时候,将 catch 到的信息输出给用户并不理想,因为用户看到一大堆的错误信息会感到很头痛,他们只希望知道操作成功还是没有成功。所以,将运行时的错误信息放置到文件是不错的选择。代码如下:
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using System;
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using System.Drawing;
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using System.Collections;
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using System.ComponentModel;
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using System.Windows.Forms;
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using System.Data;
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using System.Diagnostics ;
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using System.Configuration ;
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namespace AppTest
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{
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/// <summary>
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/// Form1 的摘要说明。
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/// </summary>
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public class Form1 : System.Windows.Forms.Form
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{
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private System.Windows.Forms.Button button1;
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/// <summary>
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/// 必需的设计器变量。
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/// </summary>
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private System.ComponentModel.Container components = null;
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public Form1()
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{
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//
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// Windows 窗体设计器支持所必需的
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//
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Debug.WriteLine ("初始化 Form1");
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InitializeComponent();
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//
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// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
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//
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}
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/// <summary>
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/// 清理所有正在使用的资源。
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/// </summary>
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protected override void Dispose( bool disposing )
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{
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Debug.WriteLine ("清理资源.");
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if( disposing )
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{
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if (components != null)
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{
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components.Dispose();
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}
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}
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base.Dispose( disposing );
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}
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Windows 窗体设计器生成的代码
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/// <summary>
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/// 应用程序的主入口点。
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/// </summary>
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[STAThread]
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static void Main()
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{
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Debug.WriteLine ("启动应用程序.");
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Application.Run(new Form1());
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}
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private void button1_Click(object sender, System.EventArgs e) {
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MessageBox.Show (ConfigurationSettings.AppSettings ["Port"].ToString ());
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}
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}
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}
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