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App.config和Web.config配置文件的自定义配置节点

  <configSections>
    <section name="Test1" type="Demo.Section1,Demo"/>
    ..............
  </configSections>

<appSettings>
    <!--允许上传的图片格式类型-->
    <add key="ImageType" value=".jpg;.bmp;.gif;.png;.jpeg"/>
    <!--允许上传的文件类型-->
    <add key="FileType" value=".jpg;.bmp;.gif;.png;.jpeg;.pdf;.zip;.rar;.xls;.doc"/>
</appSettings>

string fileType=ConfigurationManager.AppSettings["FileType "];

  <connectionStrings>
    <add name="OraProfileConnString" connectionString="user id=admin;data source=CRMDB;password=123456;" providerName="System.Data.OracleClient"/>
  </connectionStrings>

///1读取web.config文件节点配置
string ConnectionStringProfile = ConfigurationManager.ConnectionStrings["OraProfileConnString"].ConnectionString;
///2实例化OracleConnection对象
OracleConnection conn = new OracleConnection(ConnectionStringProfile);

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="Test1" type="Demo.Section1,Demo"/>
  </configSections>
  <Test1 UserName="aehyok" Path="www.cnblogs.com/aehyok"></Test1>
</configuration>

namespace Demo
    public class Section1 : ConfigurationSection
        [ConfigurationProperty("UserName")]
        public string UserName
            get { return this["UserName"].ToString(); }
            set { this["UserName"] = value; }
        [ConfigurationProperty("Path")]
        public string Path
            get { return this["Path"].ToString(); }
            set { this["Path"] = value; }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="Test2" type="Demo.Section2,Demo"/>
  </configSections>
  <Test2>
    <Users UserName="aehyok" Password="123456"></Users>
  </Test2>
</configuration>

namespace Demo
    public class Section2 : ConfigurationSection
        [ConfigurationProperty("Users", IsRequired = true)]
        public SectionElement Users
            get { return (SectionElement)this["Users"]; }
        public class SectionElement : ConfigurationElement
            [ConfigurationProperty("UserName", IsRequired = true)]
            public string UserName
                get { return this["UserName"].ToString(); }
                set { this["UserName"] = value; }
            [ConfigurationProperty("Password", IsRequired = true)]
            public string Password
                get { return this["Password"].ToString(); }
                set { this["Password"] = value; }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="Test3" type="Demo.Section3,Demo"/>
  </configSections>
  <Test3>
      <![CDATA[
      Create proc insert_bank @param1 char(10),@param2 varchar(20),@param3 varchar(20),@param4 int,@param5 int output
        with encryption ---------加密
        insert bankMoney (id,userID,sex,Money)
        Values(@param1,@param2,@param3, @param4)
        select @param5=sum(Money) from bankMoney where userID='Zhangsan'
      <![CDATA[
            <title>Test</title>
        </head>
            This is Test。
        </body>
        </html>
  </Test3>
</configuration>

namespace Demo
    public class Section3 : ConfigurationSection
        [ConfigurationProperty("T1", IsRequired = true)]
        public MyTextElement Command1
            get { return (MyTextElement)this["T1"]; }
        [ConfigurationProperty("T2", IsRequired = true)]
        public MyTextElement Command2
            get { return (MyTextElement)this["T2"]; }
    public class MyTextElement : ConfigurationElement
        protected override void DeserializeElement(XmlReader reader, bool serializeCollectionKey)
            CommandText = reader.ReadElementContentAs(typeof(string), null) as string;
        protected override bool SerializeElement(XmlWriter writer, bool serializeCollectionKey)
            if (writer != null)
                writer.WriteCData(CommandText);
            return true;
        [ConfigurationProperty("data", IsRequired = false)]
        public string CommandText
            get { return this["data"].ToString(); }
            set { this["data"] = value; }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="Test4" type="Demo.Section4,Demo"/>
  </configSections>
  <Test4>
    <add key="1" value="aehyok"></add>
    <add key="2" value="Leo"></add>
    <add key="3" value="Lynn"></add>
  </Test4>
</configuration>

namespace Demo
    public class Section4 : ConfigurationSection
        private static readonly ConfigurationProperty s_property
        = new ConfigurationProperty(string.Empty, typeof(MyKeyValueCollection), null,
                                        ConfigurationPropertyOptions.IsDefaultCollection);
        [ConfigurationProperty("", Options = ConfigurationPropertyOptions.IsDefaultCollection)]
        public MyKeyValueCollection KeyValues
                return (MyKeyValueCollection)base[s_property];
    [ConfigurationCollection(typeof(MyKeyValueSetting))]
    public class MyKeyValueCollection : ConfigurationElementCollection        // 自定义一个集合
        // 基本上，所有的方法都只要简单地调用基类的实现就可以了。
        public MyKeyValueCollection()
            : base(StringComparer.OrdinalIgnoreCase)    // 忽略大小写
        // 其实关键就是这个索引器。但它也是调用基类的实现，只是做下类型转就行了。
        new public MyKeyValueSetting this[string name]
                return (MyKeyValueSetting)base.BaseGet(name);
        // 下面二个方法中抽象类中必须要实现的。
        protected override ConfigurationElement CreateNewElement()
            return new MyKeyValueSetting();
        protected override object GetElementKey(ConfigurationElement element)
            return ((MyKeyValueSetting)element).Key;
        // 说明：如果不需要在代码中修改集合，可以不实现Add, Clear, Remove
        public void Add(MyKeyValueSetting setting)
            this.BaseAdd(setting);
        public void Clear()
            base.BaseClear();
        public void Remove(string name)
            base.BaseRemove(name);
    public class MyKeyValueSetting : ConfigurationElement    // 集合中的每个元素
        [ConfigurationProperty("key", IsRequired = true)]
        public string Key
            get { return this["key"].ToString(); }
            set { this["key"] = value; }
        [ConfigurationProperty("value", IsRequired = true)]
        public string Value
            get { return this["value"].ToString(); }
            set { this["value"] = value; }
    }

        private void button1_Click(object sender, EventArgs e)
            Section1 sectioin1 = (Section1)ConfigurationManager.GetSection("Test1");
            txtUserName.Text = sectioin1.UserName;
            txtPath.Text = sectioin1.Path;
        private void button4_Click(object sender, EventArgs e)
            Section2 sectioin2 = (Section2)ConfigurationManager.GetSection("Test2");
            txtUName.Text = sectioin2.Users.UserName;
            txtPassword.Text = sectioin2.Users.Password;
        private void button6_Click(object sender, EventArgs e)
            Section3 section3 = (Section3)ConfigurationManager.GetSection("Test3");
            T1.Text = section3.T1.CommandText.Trim();
            T2.Text = section3.T2.CommandText.Trim();
        private void button8_Click(object sender, EventArgs e)
            Section4 section4 = (Section4)ConfigurationManager.GetSection("Test4");
            txtKeyValues.Text = string.Join("\r\n",
                                    (from kv in section4.KeyValues.Cast<MyKeyValueSetting>()
                                     let s = string.Format("{0}={1}", kv.Key, kv.Value)
                                     select s).ToArray());
        }

 Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

        private void button2_Click(object sender, EventArgs e)
            Section1 sectioin1 = config.GetSection("Test1") as Section1;
            sectioin1.UserName = txtUserName.Text;
            sectioin1.Path = txtPath.Text;
            config.Save();
        private void button3_Click(object sender, EventArgs e)
            Section2 sectioin2 = config.GetSection("Test2") as Section2;
            sectioin2.Users.UserName = txtUName.Text;
            sectioin2.Users.Password = txtPassword.Text;
            config.Save();
        private void button5_Click(object sender, EventArgs e)
            Section3 section3 = config.GetSection("Test3") as Section3;
            section3.T1.CommandText = T1.Text.Trim();
            section3.T2.CommandText = T2.Text.Trim();
            config.Save();
        private void button7_Click(object sender, EventArgs e)
            Section4 section4 = config.GetSection("Test4") as Section4;
            section4.KeyValues.Clear();
            (from s in txtKeyValues.Lines
             let p = s.IndexOf('=')
             where p > 0