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

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。