.NET configuration file: how to check if ConfigSection is present

Question

Consider:

Line:

<section name="unity" />

Block:

<unity>
    <typeAliases />
    <containers />
</unity>

Say the line is available in the .config file while the block is missing.

How to programmatically check if a block exists or not?

[EDIT]

For those who are geniuses who quickly noted a negative question:

I have already tried ConfigurationManager.GetSection()

and

var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

var section = config.GetSection("unity");

var sInfo = section.SectionInformation;

var isDeclared = sInfo.IsDeclared;

Correct me if I am wrong, the above does not return zero if defined <configSections>(even if the actual unit block is missing).

Answer 1

I found this post looking for an answer to this post. I thought I would be back and send the answer now, when I resolved it.

ConfigurationSection ConfigurationElement, ElementInformation, , Deserialization.

ConfigurationSection . ConfigurationSection ConfigurationElement:

//After Deserialization
if(!customSection.ElementInformation.IsPresent)
    Console.WriteLine("Section Missing");

, - , ( , "PropName" ), PropName ElementInformation IsPresent:

if(!customSection.propName.ElementInformation.IsPresent)
    Console.WriteLine("Configuration Element was not found.");

, , <configSections> , :

CustomSection mySection = 
    config.GetSection("MySection") as CustomSection;

if(mySection == null)
    Console.WriteLine("ConfigSection 'MySection' was not defined.");

-,

Answer 2

ConfigurationManager.GetSection. null, .

: System.Object

ConfigurationSection, null, .

if (ConfigurationManager.GetSection("unity") == null)
{
    Console.WriteLine("Section does not exist");
}

Answer 3

.

var unitySection = ConfigurationManager.GetSection("unity") as UnityConfigurationSection;
if (unitySection != null && unitySection.Containers.Count != 0)
    container.LoadConfiguration();

,

Answer 4

, , ConfigurationManager.GetSection(). , , , name= ""? , - :

ConfigurationManager.GetSection("unity/unity");

cs, , - , RB.

*** EDIT ***

, , , :

ConfigurationSection section = ConfigurationManager.GetSection("unity");
System.Xml.XmlDocument xmlData = new System.Xml.XmlDocument();
xmlData.LoadXml(section);

XmlNode Found = null;

foreach (System.Xml.XmlNode node in xmlData.ChildNodes)         
{             
    if (node.HasChildNodes) 
    {        
        Found = FindNode(node.ChildNodes, "unity"); 
    }          
}

if(Found == null) //do something   

Answer 5

xml reader children "". IConfigurationSectionHandler, CreateMethod node ,

  public class CustomConfigurationSectionHandler : IConfigurationSectionHandler { 
     public object Create(object parent, 
       object configContext, System.Xml.XmlNode section)
           {
                 //check if section is a line , if yes return null
                 if( section ...)
                 { return null; }
                 //otherwise return whatever result you want :)
                 else {  }
           }
   }

, , ConfigurationManager.GetSection("unity") .

Answer 6

XML . , , .

.

[@sr28 @tchrikch ]

if (XDocument
  .Load(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile)
  .XPathSelectElement("/*[local-name() = 'configuration']/*[local-name() = 'unity']") == null)

Answer 7

, ConfigurationManager.GetSection Method.

if(ConfigurationManager.GetSection(sectionName) == null)
{
  // do something
}

Answer 8

You can open the configuration file and try to access the configuration by its name.

CustomSection customSection;

            // Get the current configuration file.
            System.Configuration.Configuration config =
                    ConfigurationManager.OpenExeConfiguration(
                    ConfigurationUserLevel.None);

            // Create the section entry   
            // in the <configSections> and the  
            // related target section in <configuration>. 
            if (config.Sections["CustomSection"] == null)
            {

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