app.config定制部分阅读

Question

我有一个阅读从应用程序配置自定义部分的问题。 我

的app.config：

<configuration> 
    <configSections> 
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" > 
     <section name="StartupFolders" type="Test.FolderConfiguration, Test"/> 
    </sectionGroup> 
    </configSections> 

    <applicationSettings> 
    <StartupFolders> 
     <Folders> 
     <Folder folderType="A" path="c:\foo" /> 
     <Folder folderType="B" path="C:\foo1" /> 
     </Folders> 
    </StartupFolders> 
    </applicationSettings> 
</configuration> 

FolderConfiguration.cs：

namespace Test 
{ 
    public class FolderElement : ConfigurationElement 
    { 

     [ConfigurationProperty("folderType", DefaultValue = "", IsKey = true, IsRequired = true)] 
     public string FolderType 
     { 
      get { return ((string)(base["folderType"])); } 
      set { base["folderType"] = value; } 
     } 

     [ConfigurationProperty("path", DefaultValue = "", IsKey = false, IsRequired = false)] 
     public string Path 
     { 
      get { return ((string)(base["path"])); } 
      set { base["path"] = value; } 
     } 
    } 

    [ConfigurationCollection(typeof(FolderElement))] 
    public class FoldersCollection : ConfigurationElementCollection 
    { 
     protected override ConfigurationElement CreateNewElement() 
     { 
      return new FolderElement(); 
     } 

     protected override object GetElementKey(ConfigurationElement element) 
     { 
      return ((FolderElement)(element)).FolderType; 
     } 

     public FolderElement this[int idx] 
     { 
      get { return (FolderElement)BaseGet(idx); } 
     } 
    } 
    class FolderConfiguration : ConfigurationSection 
    { 
     [ConfigurationProperty("Folders")] 
     public FoldersCollection FolderItems 
     { 
      get { return ((FoldersCollection)(base["Folders"])); } 
     } 
    } 
} 

在MainWindow.cs

最后，我用它都像：

Configuration cfg = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 
      FolderConfiguration section = (FolderConfiguration)cfg.Sections["StartupFolders"]; 

返回我部分== null。我可以;不明白我做错了什么。任何帮助，请

Answer 1

class FolderConfiguration : ConfigurationSection 
{ 
    [ConfigurationProperty("Folders")] 
    [ConfigurationCollection(typeof(FoldersCollection), AddItemName = "Folder"] 
    public FoldersCollection Folders 
    { 
     get { return ((FoldersCollection)(base["Folders"])); } 
    } 
} 

还，您FolderElements属性，您有：

get { return ((string)(base["folderType"])); } 
set { base["folderType"] = value; } 

它应该是：

get { return ((string)(this["folderType"])); } 
set { this["folderType"] = value; } 

这是否帮助任何？

编辑

我立足我的答案关闭this

这是否返回什么？ var folderConfig = ConfigurationManager.GetSection（“StartupFolders”）作为FolderConfiguration; if（folderConfig！= null）{//通过集合循环}

Answer 2

请看this question。它只有一个级别（在引用的问题是用户），但我没有看到StartupFolders-> Folders-> Folder的原因。您可以只有

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
    <configSections> 
     <section name="Folders" type="ConsoleApplication1.FoldersConfigMapSection, ConsoleApplication1"/> 
    </configSections> 
    <Folders> 
     <Folder folderType="A" path="c:\foo" /> 
     <Folder folderType="B" path="C:\foo1" /> 
    </Folders> 
    <startup> 
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" /> 
    </startup> 
</configuration>