我的配置文件是这样的:
<?xml version="1.0" encoding="gb2312" ?>
<configuration>
<appSettings>
<add key="connstring" value="provider=MSDAORA.1;Data Source=ureport;User ID=urbase;Persist Security Info=True"/>
</appSettings>
</configuration>
然后在程序里面用下面语句取值:
string str = System.Configuration.ConfigurationSettings.AppSettings["connstring"].ToString();
<?xml version="1.0" encoding="gb2312" ?>
<configuration>
<appSettings>
<add key="connstring" value="provider=MSDAORA.1;Data Source=ureport;User ID=urbase;Persist Security Info=True"/>
</appSettings>
</configuration>
然后在程序里面用下面语句取值:
string str = System.Configuration.ConfigurationSettings.AppSettings["connstring"].ToString();
<appSettings>
</appSettings>
<section name="AppConfig" type="MyApp.AppConfig, MyApp" />
</configSections> 声明了一个叫AppConfig的Section 2。编辑web.config文件添加以下内容,加入一个Section<AppConfig>
<add key="ConnectionString" value="this is a ConnectionString" />
<add key="UserCount" value="199" />
</AppConfig>
这个Section包括两个 Key3。从IConfigurationSectionHandler派生一个类,AppConfig实现Create方法,代码如下public class AppConfig : IConfigurationSectionHandler
{
static String m_connectionString = String.Empty;
static Int32 m_userCount = 0;
public static String ConnectionString
{
get
{
return m_connectionString;
}
}
public static Int32 UserCount
{
get
{
return m_userCount;
}
} static String ReadSetting(NameValueCollection nvc, String key, String defaultValue)
{
String theValue = nvc[key];
if(theValue == String.Empty)
return defaultValue; return theValue;
} public object Create(object parent, object configContext, XmlNode section)
{
NameValueCollection settings;
try
{
NameValueSectionHandler baseHandler = new NameValueSectionHandler();
settings = (NameValueCollection)baseHandler.Create(parent, configContext, section);
}
catch
{
settings = null;
}
if ( settings != null )
{
m_connectionString = AppConfig.ReadSetting(settings, "ConnectionString", String.Empty);
m_userCount = Convert.ToInt32(AppConfig.ReadSetting(settings, "UserCount", "0"));
}
return settings;
}
}我们把所有的配置都映射成相应的静态成员变量,并且是写成只读属性,这样程序通过类似AppConfig.ConnectionString就可以访问,配置文件中的项目了4。最后还要做一件事情在Global.asax.cs中的Application_Start中添加以下代码System.Configuration.ConfigurationSettings.GetConfig("AppConfig"); 这样在程序启动后,会读取AppConfig这个Section中的值,系统会调用你自己实现的IConfigurationSectionHandler接口来读取配置
你<poolgroup>是不是层次太深了,试试简单些呢,还有你在Global.asax.cs中的Application_Start中添加System.Configuration.ConfigurationSettings.GetConfig("AppConfig") 了吗
<add key="ConnectString" value="User ID=sa;Data Source=CHISTOPHER;Tag with column collation when possible=False;Initial Catalog=Northwind;Use Procedure for Prepare=1;Auto Translate=True;Persist Security Info=True;Provider=SQLOLEDB.1;Workstation ID=CHISTOPHER;Use Encryption for Data=False;Packet Size=4096";/>调用config文件的字符串是用
OleDbConnection Conn = new OleDbConnection(ConfigurationSettings.AppSettings["ConnectString"]);
<section name="AppConfig" type="MyApp.AppConfig, MyApp" />
都是说无法创建MyApp.AppConfig, MyApp 也就是无法创建type里面定义的