PropertyInformation 类

定义

命名空间:

System.Configuration

程序集:

System.Configuration.ConfigurationManager.dll

包:

System.Configuration.ConfigurationManager v8.0.0

Source:

PropertyInformation.cs

包含配置中的个别属性的元数据信息。 无法继承此类型。

public ref class PropertyInformation sealed

public sealed class PropertyInformation

type PropertyInformation = class

Public NotInheritable Class PropertyInformation

继承

Object

PropertyInformation

示例

下面的代码示例演示如何使用 PropertyInformation 类型。

#region Using directives

using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Web;
using System.Web.Configuration;

#endregion

namespace Samples.ConfigurationExamples
{
  class UsingPropertyInformation
  {
    static void Main(string[] args)
    {
      try
      {
        // Set the path of the config file.
        string configPath = "";

        // Get the Web application configuration object.
        Configuration config = 
          WebConfigurationManager.OpenWebConfiguration(configPath);

        // Get the section related object.
        AnonymousIdentificationSection configSection =
          (AnonymousIdentificationSection)config.GetSection
          ("system.web/anonymousIdentification");

        // Display title.
        Console.WriteLine("Configuration PropertyInformation");
        Console.WriteLine("Section: anonymousIdentification");

        // Instantiate a new PropertyInformationCollection object.
        PropertyInformationCollection propCollection =
          configSection.ElementInformation.Properties;

        // Display Collection Count.
        Console.WriteLine("Collection Count: {0}", 
          propCollection.Count);

        // Display properties of elements 
        // of the PropertyInformationCollection.
        foreach (PropertyInformation propertyItem in propCollection)
        {
          Console.WriteLine();
          Console.WriteLine("Property Details:");

          // Display the Name property.
          Console.WriteLine("Name: {0}", propertyItem.Name);

          // Display the Value property.
          Console.WriteLine("Value: {0}", propertyItem.Value);

          // Display the DefaultValue property.
          Console.WriteLine("DefaultValue: {0}", 
            propertyItem.DefaultValue);

          // Display the Type property.
          Console.WriteLine("Type: {0}", propertyItem.Type);

          // Display the IsKey property.
          Console.WriteLine("IsKey: {0}", propertyItem.IsKey);

          // Display the IsLocked property.
          Console.WriteLine("IsLocked: {0}", propertyItem.IsLocked);

          // Display the IsModified property.
          Console.WriteLine("IsModified: {0}", propertyItem.IsModified);

          // Display the IsRequired property.
          Console.WriteLine("IsRequired: {0}", propertyItem.IsRequired);

          // Display the LineNumber property.
          Console.WriteLine("LineNumber: {0}", propertyItem.LineNumber);

          // Display the Source property.
          Console.WriteLine("Source: {0}", propertyItem.Source);

          // Display the Validator property.
          Console.WriteLine("Validator: {0}", propertyItem.Validator);

          // Display the ValueOrigin property.
          Console.WriteLine("ValueOrigin: {0}", propertyItem.ValueOrigin);
        }

        Console.WriteLine("");
        Console.WriteLine("Configuration - Accessing an Attribute");
        // Create EllementInformation object.
        ElementInformation elementInfo =
          configSection.ElementInformation;
        // Create a PropertyInformationCollection object.
        PropertyInformationCollection propertyInfoCollection =
          elementInfo.Properties;
        // Create a PropertyInformation object.
        PropertyInformation myPropertyInfo =
          propertyInfoCollection["enabled"];
        // Display the property value.
        Console.WriteLine
          ("anonymousIdentification Section - Enabled: {0}",
          myPropertyInfo.Value);
      }

      catch (Exception e)
      {
        // Error.
        Console.WriteLine(e.ToString());
      }

      // Display and wait.
      Console.ReadLine();
    }
  }
}

Imports System.Collections.Generic
Imports System.Text
Imports System.Configuration
Imports System.Web
Imports System.Web.Configuration

Namespace Samples.ConfigurationExamples
  Class UsingPropertyInformation
    Public Shared Sub Main()
      Try
        ' Set the path of the config file.
        Dim configPath As String = ""

        ' Get the Web application configuration object.
        Dim config As Configuration = _
          WebConfigurationManager.OpenWebConfiguration(configPath)

        ' Get the section related object.

        Dim configSection As AnonymousIdentificationSection = _
        CType(config.GetSection("system.web/anonymousIdentification"), _
        AnonymousIdentificationSection)

        ' Display title.
        Console.WriteLine("Configuration PropertyInformation")
        Console.WriteLine("Section: anonymousIdentification")

        ' Instantiate a new PropertyInformationCollection object.
        Dim propCollection As PropertyInformationCollection = _
         configSection.ElementInformation.Properties()

        ' Display Collection Count.
        Console.WriteLine("Collection Count: {0}", _
          propCollection.Count)

        ' Display properties of elements 
        ' of the PropertyInformationCollection.
        For Each propertyItem As PropertyInformation In propCollection
          Console.WriteLine()
          Console.WriteLine("Property Details:")

          ' Display the Name property.
          Console.WriteLine("Name: {0}", propertyItem.Name)

          ' Display the Value property.
          Console.WriteLine("Value: {0}", propertyItem.Value)

          ' Display the DefaultValue property.
          Console.WriteLine("DefaultValue: {0}", _
            propertyItem.DefaultValue) _

          ' Display the Type property.
          Console.WriteLine("Type: {0}", propertyItem.Type)

          ' Display the IsKey property.
          Console.WriteLine("IsKey: {0}", propertyItem.IsKey)

          ' Display the IsLocked property.
          Console.WriteLine("IsLocked: {0}", propertyItem.IsLocked)

          ' Display the IsModified property.
          Console.WriteLine("IsModified: {0}", propertyItem.IsModified)

          ' Display the IsRequired property.
          Console.WriteLine("IsRequired: {0}", propertyItem.IsRequired)

          ' Display the LineNumber property.
          Console.WriteLine("LineNumber: {0}", propertyItem.LineNumber)

          ' Display the Source property.
          Console.WriteLine("Source: {0}", propertyItem.Source)

          ' Display the Validator property.
          Console.WriteLine("Validator: {0}", propertyItem.Validator)

          ' Display the ValueOrigin property.
          Console.WriteLine("ValueOrigin: {0}", propertyItem.ValueOrigin)
        Next

        Console.WriteLine("")
        Console.WriteLine("Configuration - Accessing an Attribute")
        ' Create EllementInformation object.
        Dim elementInfo As ElementInformation = _
        configSection.ElementInformation()
        ' Create a PropertyInformationCollection object.
        Dim propertyInfoCollection As PropertyInformationCollection = _
        elementInfo.Properties()
        ' Create a PropertyInformation object.
        Dim myPropertyInfo As PropertyInformation = _
          propertyInfoCollection("enabled")
        ' Display the property value.
        Console.WriteLine _
          ("anonymousIdentification Section - Enabled: {0}", _
          myPropertyInfo.Value)

      Catch e As Exception
        ' Error.
        Console.WriteLine("Error: {0}", _
          e.Message.ToString())
      End Try

      ' Display and wait.
      Console.ReadLine()
    End Sub
  End Class
End Namespace

注解

对象 PropertyInformation 包含配置中单个属性的元信息。 验证和更改单个属性的属性时，可以使用此对象。

对象 PropertyInformation 派生自关联的 PropertyInformationCollection 对象。 对象 PropertyInformationCollection 派生自关联的 ElementInformation 对象。

属性

Converter	获取与配置特性相关的 TypeConverter 对象。
DefaultValue	获取一个对象，该对象包含与配置特性相关的默认值。
Description	获取与配置特性相对应的对象的说明。
IsKey	获取指定配置特性是否为键的值。
IsLocked	获取指定配置特性是否锁定的值。
IsModified	获取指定配置特性是否已修改的值。
IsRequired	获取指定是否需要配置特性的值。
LineNumber	获取与配置特性相关的配置文件中的行号。
Name	获取与配置特性相对应的对象的名称。
Source	获取与配置特性相对应的源文件。
Type	获取与配置特性相对应的对象的 Type。
Validator	获取与配置特性相关的 ConfigurationValidatorBase 对象。
Value	获取或设置包含与配置特性相关的值的对象。
ValueOrigin	获取与配置特性相关的 PropertyValueOrigin 对象。

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回表示当前对象的字符串。 (继承自 Object)

另请参阅

• PropertyInformationCollection
• ElementInformation
• ConfigurationElement