c#中的自定义配置节

技术人写博客，真是应该，这个自定义配置节很早以前就做了，但现在项目中又要用到了，以前的错误还是会犯，今天还是把这些都记下来吧。c#中的自定义配置节主要是由以下几个类来实现的：ConfigurationSection，ConfigurationElementCollection和ConfigurationElement，层次也很清楚。ConfigurationSection就是最上导的节点。放在

<configSections>

    <section name="" type="" />

 </configSections>

里，其中name就是节点的名称，type里就是以“程序所在完整路径,程序集名”。

ConfigurationElementCollection和ConfigurationElement就是管下面真正的配置了。多话不说了，贴上我的测试代码吧!

namespace Test
{
    class TestSection : ConfigurationSection
    {
        [ConfigurationProperty("columns", IsRequired = true)]
        public ColumnElements Columns
        {
            get
            {
                return this["columns"] as ColumnElements;
            }

            private set{}
        }

        [ConfigurationProperty("times", IsRequired = true)]
        public string Times
        {
            get
            {
                return this["times"] as string;
            }

            private set { }
        }
    }
}

　　

namespace Test
{
    public class ColumnElements : ConfigurationElementCollection
    {
        //public ColumnElements()
        //{
        //    return new ColumnElement();
        //}

        #region 基类方法重载

        protected override ConfigurationElement CreateNewElement()
        {
            return new ColumnElement();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return (element as ColumnElement).Name;
        }

        public new ColumnElement this[string name]
        {
            get
            {
                return BaseGet(name) as ColumnElement;
            }
        }

        public new ColumnElement this[int index]
        {
            get
            {
                return BaseGet(index) as ColumnElement;
            }
        }

        protected override string ElementName
        {
            get
            {
                return "column";
            }
        }

        public override ConfigurationElementCollectionType CollectionType
        {
            get
            {
                return ConfigurationElementCollectionType.BasicMap;
            }
        }
        #endregion

        #region 私有方法
        


        #endregion
    }
}

　　

namespace Test
{
    public class ColumnElement : ConfigurationElement
    {
        #region 字段和属性

        [ConfigurationProperty("name", IsRequired = true)]
        public string Name
        {
            get
            {
                return this["name"] as string;
            }

            private set{}
        }

        [ConfigurationProperty("type", IsRequired = true)]
        public string Type
        {
            get
            {
                return this["type"] as string;
            }

            private set{}
        }

        [ConfigurationProperty("length", IsRequired = false)]
        public int? Length
        {
            get
            {
                return (int?)this["length"];
            }

            private set{}
        }

        #endregion       
    }
}

　　最后一定要提醒的是：ConfigurationElementCollection的子类里必须要实现CollectionType方法和ElementName属性啊，不然肯定会出错了，切记啊！