ASP.NET Web.Config 读资料 (学习笔记)
refer : http://www.cnblogs.com/fish-li/archive/2011/12/18/2292037.html
上面这篇写很好了.
在做项目时，我们经常会遇到一些资料，我们不知道该把它们安置在何处.
比如公司资料
1.放在数据库 (资料不经常修改，没必要这么大费周章吧).
2.放在代码里头 (也不是说绝对不会改丫，写在代码里变成dll后不容易修改了耶 /.\)
大部分人都会把这样一群资料统统塞进 webConfig appSettings 里头
数据少的话，其实也没什么，只是一但数据多起来，我们就得分类来装置了。
这里我会教大家如果在 webConfig 中写自己的 Element 来不存资料，而不完全的塞在 appSettings 里头
从 appSettings 或者资料
<appSettings> <add key="stringData" value="value" /> </appSettings> string value = ConfigurationManager.AppSettings["stringData"].ToString();
自定义一个 object
<configuration>
<configSections>
<section name="objectSection" type="Project.Config.objectSection" /> <!--要在 configSections 内注册哦-->
</configSections>
<objectSection
stringData="value"
intData="50"
/>
</configuration>
//对应的 Class
//每一个属性一定要用 getter 来获取
public class objectSection : ConfigurationSection
{
[ConfigurationProperty("stringData", IsRequired = true)]
public string stringData
{
get { return this["stringData"].ToString(); }
}
[ConfigurationProperty("intData", IsRequired = true)]
public int intData
{
get { return Convert.ToInt32(this["intData"]); } //这里可以做类型强转等等
}
}
嵌套 object
<configuration>
<configSections>
<section name="objectASection" type="Project.Config.objectASection" />
</configSections>
<objectASection>
<objectBSection
stringData="value"
intData="50"
/>
</objectASection>
</configuration>
public class objectASection : ConfigurationSection
{
[ConfigurationProperty("objectBSection", IsRequired = true)]
public objectBSection objectBSection
{
get { return (objectBSection)this["objectBSection"]; }
}
}
public class objectBSection : ConfigurationElement //子层继承 Element
{
[ConfigurationProperty("stringData", IsRequired = true)]
public string stringData
{
get { return this["stringData"].ToString(); } //这里可以做类型强转等等
}
[ConfigurationProperty("intData", IsRequired = true)]
public int intData
{
get { return Convert.ToInt32(this["intData"]); } //这里可以做类型强转等等
}
}
嵌套 array + object + property 综合版
<configuration>
<configSections>
<section name="objectASection" type="Project.Config.objectASection" />
</configSections>
<objectASection stringData="value">
<objectBSection
stringData="value"
intData="50"
/>
<objectCs>
<objectC Id="1" stringData="x" />
<objectC Id="2" stringData="y" />
<objectC Id="3" stringData="z" />
</objectCs>
</objectASection>
</configuration>
public class objectASection : ConfigurationSection
{
//normal value
[ConfigurationProperty("stringData", IsRequired = true)]
public string stringData
{
get { return this["stringData"].ToString(); } //这里可以做类型强转等等
}
//object value
[ConfigurationProperty("objectBSection", IsRequired = true)]
public objectBSection objectBSection
{
get { return (objectBSection)this["objectBSection"]; }
}
//array value
[ConfigurationProperty("objectCs", IsRequired = true)]
public objectCs objectCs
{
get { return (objectCs)this["objectCs"]; }
}
}
[ConfigurationCollection(typeof(objectC), AddItemName = "objectC", CollectionType = ConfigurationElementCollectionType.BasicMap)]
public class objectCs : ConfigurationElementCollection
{
protected override ConfigurationElement CreateNewElement()
{
return new objectC();
}
protected override object GetElementKey(ConfigurationElement element)
{
if (element == null) throw new ArgumentNullException("element");
return ((objectC)element).Id;
}
}
public class objectC : ConfigurationElement
{
[ConfigurationProperty("Id", IsRequired = true, IsKey = true)]
public int Id
{
get { return Convert.ToInt32(this["Id"]); }
}
[ConfigurationProperty("stringData", IsRequired = true)]
public string stringData
{
get { return this["stringData"].ToString(); }
}
}
public class objectBSection : ConfigurationElement //子层继承 Element
{
[ConfigurationProperty("stringData", IsRequired = true)]
public string stringData
{
get { return this["stringData"].ToString(); } //这里可以做类型强转等等
}
[ConfigurationProperty("intData", IsRequired = true)]
public int intData
{
get { return Convert.ToInt32(this["intData"]); } //这里可以做类型强转等等
}
}
objectASection objectASection = (objectASection)ConfigurationManager.GetSection("objectASection");
string stringData = objectASection.stringData;
stringData = objectASection.objectBSection.stringData; //value
int intData = objectASection.objectBSection.intData; //50
List<objectC> objectCs = objectASection.objectCs.Cast<objectC>().ToList();
foreach (objectC objectC in objectCs)
{
int Id = objectC.Id;
stringData = objectC.stringData;
}
还有一种就是类似 appSettings 那样本身就直接是 array 的情况
<configuration>
<configSections>
<section name="BusinessConfig" type="Project.Config.KeyValueConfig" /> <!--可以用同一个class-->
<section name="AbcConfig" type="Project.Config.KeyValueConfig" />
</configSections>
<BusinessConfig>
<add key="aa" value="11111"></add>
<add key="bb" value="22222"></add>
</BusinessConfig>
<AbcConfig>
<add key="ha" value="a"></add>
<add key="ta" value="b"></add>
</AbcConfig>
</configuration>
namespace Project.Config { public class KeyValueConfig : ConfigurationSection { private static readonly ConfigurationProperty s_property = new ConfigurationProperty(string.Empty, typeof(MyKeyValueCollection), null, ConfigurationPropertyOptions.IsDefaultCollection); [ConfigurationProperty("", Options = ConfigurationPropertyOptions.IsDefaultCollection)] public MyKeyValueCollection KeyValues { get { return (MyKeyValueCollection)base[s_property]; } } } [ConfigurationCollection(typeof(MyKeyValueSetting))] public class MyKeyValueCollection : ConfigurationElementCollection { public MyKeyValueCollection() : base(StringComparer.OrdinalIgnoreCase) { } new public MyKeyValueSetting this[string name] { get { return (MyKeyValueSetting)base.BaseGet(name); } } protected override ConfigurationElement CreateNewElement() { return new MyKeyValueSetting(); } protected override object GetElementKey(ConfigurationElement element) { return ((MyKeyValueSetting)element).Key; } } public class MyKeyValueSetting : ConfigurationElement { [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; } } } }
KeyValueConfig mySection = (KeyValueConfig)ConfigurationManager.GetSection("BusinessConfig"); string data = string.Join("\r\n", (from kv in mySection.KeyValues.Cast<MyKeyValueSetting>() let s = string.Format("{0}={1}", kv.Key, kv.Value) select s).ToArray());
