脚本宝典收集整理的这篇文章主要介绍了html5教程-自定义App.config NameValueSectionHandler的bug修复创建自己的NameValueCollectionSectionHandler，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。

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在很多时候我们需要自定义我们自己的自定义App.config 文件，而微软为我们提供了默认的

      System.Configuration.NameValueSectionHandler
      System.Configuration.DictionarySectionHandler
      System.Configuration.SingleTagSectionHandler

经常用这些也没有出现问题。今天因项目需求的问题再次使用System.Configuration.NameValueSectionHandler，相应的配置如下：

[html]
<configSections> 
    <section name="mySection1"  type="System.Configuration.NameValueSectionHandler, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/> 
  </configSections> 
  <mySection1> 
    <add key="filepath" value="Views/Channel/men"></add> 
    <add key="filepath" value="Views/Channel/homme"></add> 
    <add key="filepath" value="Views/Channel/fleece/20120906"></add> 
    <add key="filepath" value="Views/Channel/Designer"></add> 
    <add key="filepath" value="Views/Channel/coats/20120816"></add> 
    <add key="filepath" value="Views/Channel/xiuxianku/20120517"></add> 
    <add key="filepath" value="men"></add> 
    <add key="filepath" value="homme"></add> 
    <add key="filepath" value="fleece"></add> 
    <add key="filepath" value="Designer"></add> 
    <add key="filepath" value="coats"></add> 
    <add key="filepath" value="xiuxianku"></add> 
  </mySection1> 

<configSections>
    <section name="mySection1"  type="System.Configuration.NameValueSectionHandler, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
  </configSections>
  <mySection1>
    <add key="filepath" value="Views/Channel/men"></add>
    <add key="filepath" value="Views/Channel/homme"></add>
    <add key="filepath" value="Views/Channel/fleece/20120906"></add>
    <add key="filepath" value="Views/Channel/Designer"></add>
    <add key="filepath" value="Views/Channel/coats/20120816"></add>
    <add key="filepath" value="Views/Channel/xiuxianku/20120517"></add>
    <add key="filepath" value="men"></add>
    <add key="filepath" value="homme"></add>
    <add key="filepath" value="fleece"></add>
    <add key="filepath" value="Designer"></add>
    <add key="filepath" value="coats"></add>
    <add key="filepath" value="xiuxianku"></add>
  </mySection1>
然后在读取相应的配置信息。
  

[csharp]
NameValueCollection mySection1 = ((NameValueCollection)ConfigurationManager.GetSection("mySection1")); 
   List<string> fileList = mySection1["filepath"].Split(new char[] { ',' }).ToList(); 

         NameValueCollection mySection1 = ((NameValueCollection)ConfigurationManager.GetSection("mySection1"));
            List<string> fileList = mySection1["filepath"].Split(new char[] { ',' }).ToList();得到的结果只有最后一条，而我们所用的NameValueCollection不一致，让我们来看看源码吧：
[csharp]
internal static object CreateStatic(object parent, XmlNode section, string keyAttriuteName, string valueAttributeName) 
{ 
    ReadOnlyNameValueCollection values; 
    if (parent == null) 
    { 
        values = new ReadOnlyNameValueCollection(StringComparer.OrdinalIgnoreCase); 
    } 
    else 
    { 
        ReadOnlyNameValueCollection values2 = (ReadOnlyNameValueCollection) parent; 
        values = new ReadOnlyNameValueCollection(values2); 
    } 
    HandlerBase.CheckForUnrecognizedAttributes(section); 
    foreach (XmlNode node in section.ChildNodes) 
    { 
        if (!HandlerBase.IsIgnorableAlsoCheckForNonElement(node)) 
        { 
            if (node.Name == "add") 
            { 
                string str = HandlerBase.RemoveRequiredAttribute(node, keyAttriuteName); 
                string str2 = HandlerBase.RemoveRequiredAttribute(node, valueAttributeName, true); 
                HandlerBase.CheckForUnrecognizedAttributes(node); 
                values[str] = str2; 
            } 
            else if (node.Name == "remove") 
            { 
                string name = HandlerBase.RemoveRequiredAttribute(node, keyAttriuteName); 
                HandlerBase.CheckForUnrecognizedAttributes(node); 
                values.Remove(name); 
            } 
            else if (node.Name.Equals("clear")) 
            { 
                HandlerBase.CheckForUnrecognizedAttributes(node); 
                values.Clear(); 
            } 
            else 
            { 
                HandlerBase.ThrowUnrecognizedElement(node); 
            } 
        } 
    } 
    values.SetReadOnly(); 
    return values; 
} 

internal static object CreateStatic(object parent, XmlNode section, string keyAttriuteName, string valueAttributeName)
{
    ReadOnlyNameValueCollection values;
    if (parent == null)
    {
        values = new ReadOnlyNameValueCollection(StringComparer.OrdinalIgnoreCase);
    }
    else
    {
        ReadOnlyNameValueCollection values2 = (ReadOnlyNameValueCollection) parent;
        values = new ReadOnlyNameValueCollection(values2);
    }
    HandlerBase.CheckForUnrecognizedAttributes(section);
    foreach (XmlNode node in section.ChildNodes)
    {
        if (!HandlerBase.IsIgnorableAlsoCheckForNonElement(node))
        {
            if (node.Name == "add")
            {
                string str = HandlerBase.RemoveRequiredAttribute(node, keyAttriuteName);
                string str2 = HandlerBase.RemoveRequiredAttribute(node, valueAttributeName, true);
                HandlerBase.CheckForUnrecognizedAttributes(node);
                values[str] = str2;
            }
            else if (node.Name == "remove")
            {
                string name = HandlerBase.RemoveRequiredAttribute(node, keyAttriuteName);
                HandlerBase.CheckForUnrecognizedAttributes(node);
                values.Remove(name);
            }
            else if (node.Name.Equals("clear"))
            {
                HandlerBase.CheckForUnrecognizedAttributes(node);
                values.Clear();
            }
            else
            {
                HandlerBase.ThrowUnrecognizedElement(node);
            }
        }
    }
    values.SetReadOnly();
    return values;
}

很明显在add的时候它用的是values[str] = str2;而不是调用add方法。

修改后代码：

[csharp]
public class NameValueCollectionSectionHandler : IConfigurationSectionHandler 
  { 
      // Fields  
      private const string defaultKeyAttribute = "key"; 
      private const string defaultValueAttribute = "value"; 
 
      // Methods  
      public object Create(object parent, object context, XmlNode section) 
      { 
          return CreateStatic(parent, section, this.KeyAttributeName, this.ValueAttributeName); 
      } 
 
      internal static object CreateStatic(object parent, XmlNode section) 
      { 
          return CreateStatic(parent, section, "key", "value"); 
      } 
 
      internal static object CreateStatic(object parent, XmlNode section, string keyAttriuteName, string valueAttributeName) 
      { 
          NameValueCollection values; 
          if (parent == null) 
          { 
              values = new NameValueCollection(StringComparer.OrdinalIgnoreCase); 
          } 
          else 
          { 
              NameValueCollection values2 = (NameValueCollection)parent; 
              values = new NameValueCollection(values2); 
          } 
 
          foreach (XmlNode node in section.ChildNodes) 
          { 
              if (node.Name == "add") 
              { 
                  string key = node.Attributes[keyAttriuteName].Value; 
                  string value = node.Attributes[valueAttributeName].Value; 
                  values.Add(key, value); 
              } 
              else if (node.Name == "remove") 
              { 
                  string key = node.Attributes[keyAttriuteName].Value; 
                  values.Remove(key); 
              } 
              else if (node.Name.Equals("clear")) 
              { 
                  values.Clear(); 
              } 
          } 
          return values; 
      } 
 
      // Properties  
      protected virtual string KeyAttributeName 
      { 
          get 
          { 
              return "key"; 
          } 
      } 
 
      protected virtual string ValueAttributeName 
      { 
          get 
          { 
              return "value"; 
          } 
      } 
  } 

  public class NameValueCollectionSectionHandler : IConfigurationSectionHandler
    {
        // Fields
        private const string defaultKeyAttribute = "key";
        private const string defaultValueAttribute = "value";

        // Methods
        public object Create(object parent, object context, XmlNode section)
        {
            return CreateStatic(parent, section, this.KeyAttributeName, this.ValueAttributeName);
        }

        internal static object CreateStatic(object parent, XmlNode section)
        {
            return CreateStatic(parent, section, "key", "value");
        }

        internal static object CreateStatic(object parent, XmlNode section, string keyAttriuteName, string valueAttributeName)
        {
            NameValueCollection values;
            if (parent == null)
            {
                values = new NameValueCollection(StringComparer.OrdinalIgnoreCase);
            }
            else
            {
                NameValueCollection values2 = (NameValueCollection)parent;
                values = new NameValueCollection(values2);
            }

            foreach (XmlNode node in section.ChildNodes)
            {
                if (node.Name == "add")
                {
                    string key = node.Attributes[keyAttriuteName].Value;
                    string value = node.Attributes[valueAttributeName].Value;
                    values.Add(key, value);
                }
                else if (node.Name == "remove")
                {
                    string key = node.Attributes[keyAttriuteName].Value;
                    values.Remove(key);
                }
                else if (node.Name.Equals("clear"))
                {
                    values.Clear();
                }
            }
            return values;
        }

        // Properties
        protected virtual string KeyAttributeName
        {
            get
            {
                return "key";
            }
        }

        protected virtual string ValueAttributeName
        {
            get
            {
                return "value";
            }
        }
    }
当然这样运行结果就和我们常用的NameValueCollection一样。

 

 

 

觉得可用，就经常来吧！ 脚本宝典 欢迎评论哦！ html5教程，巧夺天工，精雕玉琢。小宝典献丑了！

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