設置web.config

<?xml version="1.0" ?>
<configuration>
<appSettings>
<add key="websiteName" value="My New Website"/>
<add key="welcomeMessage" value="Welcome to my new Website, friend!"/>
</appSettings>
<system.web>...</system.web>
</configuration>

取得<appSettings>的值

using System.Web.Configuration;

protected void Page_Load(object sender, EventArgs e)
{
lblSiteName.Text =
WebConfigurationManager.AppSettings["websiteName"];
lblWelcome.Text =

WebConfigurationManager.AppSettings["welcomeMessage"];
}

取得web.config其它节点的值---使用WebConfigurationManage.GetSection(“…”);

using System.Web.Configuration;

…

CompilationSection compSection =
(CompilationSection)WebConfigurationManager.GetSection("system.web/compilation");
            foreach (AssemblyInfo assm in compSection.Assemblies)
            {
                Label2.Text+=assm.Assembly + "<br />";
            }

写入web.config

using System.Web.Configuration;

using System.Configuration;

Configuration config =
WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);//取得Configuration 对象

config.AppSettings.Settings["welcomeMessage"].Value = "Welcome, again.";

config.Save();

Request.ApplicationPath

Request.CurrentExecutionFilePath

custom section

Creating a Section Class

for excample:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Configuration;

// 定义继承自System.Configuration.ConfigurationSection的public类

//注意不要将此类放入任何namespace中。

    public class OrderService : ConfigurationSection     {
//It’s Called:strongly typed properties       

[ConfigurationProperty("available",
IsRequired = false, DefaultValue = true)]
        public bool Available
        {
            get { return (bool)base["available"]; }
            set { base["available"] = value; }
        }
        [ConfigurationProperty("pollTimeout",
        IsRequired = true)]
        public TimeSpan PollTimeout
        {
            get { return (TimeSpan)base["pollTimeout"]; }
            set { base["pollTimeout"] = value; }
        }
        [ConfigurationProperty("location",
        IsRequired = true)]
        public string Location
        {
            get { return (string)base["location"]; }
            set { base["location"] = value; }
        }
  
}

Registering a Section Class

<configSections>
    <section name="orderService" type="OrderService"/>
  </configSections>
 

<orderService available="true"

                    pollTimeout="00:01:00"

                    location="tcp://OrderComputer:8010/OrderService"/>

Retrieve the information from your custom section

OrderService custSection =
(OrderService)ConfigurationManager.GetSection("orderService");
lblInfo.Text += "Retrieved service information...<br />" +
"<b>Location:</b> " + custSection.Location +
"<br /><b>Available:</b> " + custSection.Available.ToString() +
"<br /><b>Timeout:</b> " + custSection.PollTimeout.ToString() + "<br /><br />";

显示结果：

LabelRetrieved service information...
Location: tcp://OrderComputer:8010/OrderService
Available: True
Timeout: 00:01:00

Programmatic Encryption

Configuration config = WebConfigurationManager.OpenWebConfiguration("/");
ConfigurationSection appSettings = config.GetSection("appSettings");
if (appSettings.SectionInformation.IsProtected)
{
appSettings.SectionInformation.UnprotectSection();
}
else
{
appSettings.SectionInformation.ProtectSection(
"DataProtectionConfigurationProvider");
}
config.Save();

Command-Line Encryption

• The -pe switch specifies the configuration section to encrypt.
• The -app switch specifies your web application’s virtual path.
• The -prov switch specifies the provider name.

aspnet_regiis.exe command-line utility

c:\Windows\Microsoft.NET\Framework\[Version]

h t t p://localhost/TestApp:

aspnet_regiis -pe "appSettings" -app "/TestApp"
-prov "DataProtectionConfigurationProvider"