项目上右键--添加--添加新项--选应用程序配置文件则增加App.config
以配置数据库连接串为例,在App.config配置如下:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="DataBase" value="Access"/>
<add key="ConnectionString" value="Provider=Microsoft.Jet.OLEDB.4.0;Password=;User ID=;Data Source=..\..\..\Northwind.mdb;Jet OLEDB:Database Password="/>
<add key="打印源码" value="www.webmis.com.cn"/>
</appSettings>
</configuration>
/// <summary>
/// 默认从config文件中读取数据库类型和连接串。请在配置文件中设置DataBase与ConnectionString两健及值。
/// 如<appSettings><add key="DataBase" value="SQLSERVER"/><add key="ConnectionString" value="server=localhost;database=NorthWind;user id=sa;password=;"/></appSettings>
/// </summary>
private void GetDefaultParFromConfig()
{
string strDataClientType = "";
string strConnectionString = "";
//读取配置文件,没有时会返回null,不会出错
strDataClientType = System.Configuration.ConfigurationSettings.AppSettings["DataBase"];
strConnectionString = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
....
}