自定义App.config NameValueSectionHandler的bug修复创建自己的NameValueCollectionSectionHandler

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导读：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，觉得挺不错的，现在分享给大家，也...

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，觉得挺不错的，现在分享给大家，也给大家做个参考。小宝典致力于为广大程序猿（媛）提供高品质的代码服务，请大家多多光顾小站，小宝典在此谢过。

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"));
Liststring> fileList = mySection1["filepath"].SplIT(new char[] { ',' } ).ToList();

         NameValueCollection mySection1 = ((NameValueCollection)ConfigurationManager.GetSection("mySection1"));
            Liststring> 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。

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>

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

         NameValueCollection mySection1 = ((NameValueCollection)ConfigurationManager.GetSection("mySection1"));
            Liststring> 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;
}

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";
          }
      }
}

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

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

觉得可用，就经常来吧！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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