System.Configuration.ConfigurationCollectionAttribute 类

System.Configuration.ConfigurationCollectionAttribute 类例子

VB 复制 Imports System Imports System.Configuration ' Define a custom section that contains a custom ' UrlsCollection collection of custom UrlConfigElement elements. ' This class shows how to use the ConfigurationCollectionAttribute. Public Class UrlsSection Inherits ConfigurationSection ' Declare the Urls collection property using the ' ConfigurationCollectionAttribute. ' This allows to build a nested section that contains ' a collection of elements. _ Public ReadOnly Property Urls() As UrlsCollection Get Dim urlsCollection As UrlsCollection = CType(MyBase.Item("urls"), UrlsCollection) Return urlsCollection End Get End Property End Class ' Define the custom UrlsCollection that contains the ' custom UrlsConfigElement elements. Public Class UrlsCollection Inherits ConfigurationElementCollection Public Sub New() Dim url As UrlConfigElement = CType(CreateNewElement(), UrlConfigElement) Add(url) End Sub Public Overrides ReadOnly Property CollectionType() As ConfigurationElementCollectionType Get Return ConfigurationElementCollectionType.AddRemoveClearMap End Get End Property Protected Overloads Overrides Function CreateNewElement() As ConfigurationElement Return New UrlConfigElement() End Function Protected Overrides Function GetElementKey(ByVal element As ConfigurationElement) As Object Return (CType(element, UrlConfigElement)).Name End Function Default Shadows Property Item(ByVal index As Integer) As UrlConfigElement Get Return CType(BaseGet(index), UrlConfigElement) End Get Set(ByVal value As UrlConfigElement) If BaseGet(index) IsNot Nothing Then BaseRemoveAt(index) End If BaseAdd(index, value) End Set End Property Default Public Shadows ReadOnly Property Item(ByVal Name As String) As UrlConfigElement Get Return CType(BaseGet(Name), UrlConfigElement) End Get End Property Public Function IndexOf(ByVal url As UrlConfigElement) As Integer Return BaseIndexOf(url) End Function Public Sub Add(ByVal url As UrlConfigElement) BaseAdd(url) End Sub Protected Overloads Overrides Sub BaseAdd(ByVal element As ConfigurationElement) BaseAdd(element, False) End Sub Public Sub Remove(ByVal url As UrlConfigElement) If BaseIndexOf(url) >= 0 Then BaseRemove(url.Name) End If End Sub Public Sub RemoveAt(ByVal index As Integer) BaseRemoveAt(index) End Sub Public Sub Remove(ByVal name As String) BaseRemove(name) End Sub Public Sub Clear() BaseClear() End Sub End Class ' Define the custom UrlsConfigElement elements that are contained ' by the custom UrlsCollection. Public Class UrlConfigElement Inherits ConfigurationElement Public Sub New(ByVal name As String, ByVal url As String) Me.Name = name Me.Url = url End Sub Public Sub New() Me.Name = "Contoso" Me.Url = "http://www.contoso.com" Me.Port = 0 End Sub _ Public Property Name() As String Get Return CStr(Me("name")) End Get Set(ByVal value As String) Me("name") = value End Set End Property _ Public Property Url() As String Get Return CStr(Me("url")) End Get Set(ByVal value As String) Me("url") = value End Set End Property _ Public Property Port() As Integer Get Return CInt(Fix(Me("port"))) End Get Set(ByVal value As Integer) Me("port") = value End Set End Property End Class C# 复制 using System; using System.Configuration; // Define a custom section that contains a custom // UrlsCollection collection of custom UrlConfigElement elements. // This class shows how to use the ConfigurationCollectionAttribute. public class UrlsSection : ConfigurationSection { // Declare the Urls collection property using the // ConfigurationCollectionAttribute. // This allows to build a nested section that contains // a collection of elements. [ConfigurationProperty("urls", IsDefaultCollection = false)] [ConfigurationCollection(typeof(UrlsCollection), AddItemName = "add", ClearItemsName = "clear", RemoveItemName = "remove")] public UrlsCollection Urls { get { UrlsCollection urlsCollection = (UrlsCollection)base["urls"]; return urlsCollection; } } } // Define the custom UrlsCollection that contains the // custom UrlsConfigElement elements. public class UrlsCollection : ConfigurationElementCollection { public UrlsCollection() { UrlConfigElement url = (UrlConfigElement)CreateNewElement(); Add(url); } public override ConfigurationElementCollectionType CollectionType { get { return ConfigurationElementCollectionType.AddRemoveClearMap; } } protected override ConfigurationElement CreateNewElement() { return new UrlConfigElement(); } protected override Object GetElementKey(ConfigurationElement element) { return ((UrlConfigElement)element).Name; } public UrlConfigElement this[int index] { get { return (UrlConfigElement)BaseGet(index); } set { if (BaseGet(index) != null) { BaseRemoveAt(index); } BaseAdd(index, value); } } new public UrlConfigElement this[string Name] { get { return (UrlConfigElement)BaseGet(Name); } } public int IndexOf(UrlConfigElement url) { return BaseIndexOf(url); } public void Add(UrlConfigElement url) { BaseAdd(url); } protected override void BaseAdd(ConfigurationElement element) { BaseAdd(element, false); } public void Remove(UrlConfigElement url) { if (BaseIndexOf(url) >= 0) BaseRemove(url.Name); } public void RemoveAt(int index) { BaseRemoveAt(index); } public void Remove(string name) { BaseRemove(name); } public void Clear() { BaseClear(); } } // Define the custom UrlsConfigElement elements that are contained // by the custom UrlsCollection. // Notice that you can change the default values to create new default elements. public class UrlConfigElement : ConfigurationElement { public UrlConfigElement(String name, String url) { this.Name = name; this.Url = url; } public UrlConfigElement() { this.Name = "Contoso"; this.Url = "http://www.contoso.com"; this.Port = 0; } [ConfigurationProperty("name", DefaultValue = "Contoso", IsRequired = true, IsKey = true)] public string Name { get { return (string)this["name"]; } set { this["name"] = value; } } [ConfigurationProperty("url", DefaultValue = "http://www.contoso.com", IsRequired = true)] [RegexStringValidator(@"\w+:\/\/[\w.]+\S*")] public string Url { get { return (string)this["url"]; } set { this["url"] = value; } } [ConfigurationProperty("port", DefaultValue = (int)0, IsRequired = false)] [IntegerValidator(MinValue = 0, MaxValue = 8080, ExcludeRange = false)] public int Port { get { return (int)this["port"]; } set { this["port"] = value; } } } VB 复制 Imports System.Configuration Friend Class UsingConfigurationCollectionAttribute ' Create a custom section and save it in the ' application configuration file. Private Shared Sub CreateCustomSection() Try ' Create a custom configuration section. Dim myUrlsSection As New UrlsSection() ' Get the current configuration file. Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None) ' Add the custom section to the application ' configuration file. If config.Sections("MyUrls") Is Nothing Then config.Sections.Add("MyUrls", myUrlsSection) End If ' Save the application configuration file. myUrlsSection.SectionInformation.ForceSave = True config.Save(ConfigurationSaveMode.Modified) Console.WriteLine("Created custom section in the application configuration file: {0}", config.FilePath) Console.WriteLine() Catch err As ConfigurationErrorsException Console.WriteLine("CreateCustomSection: {0}", err.ToString()) End Try End Sub Private Shared Sub ReadCustomSection() Try ' Get the application configuration file. Dim config As System.Configuration.Configuration = TryCast(ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None), Configuration) ' Read and display the custom section. Dim myUrlsSection As UrlsSection = TryCast(ConfigurationManager.GetSection("MyUrls"), UrlsSection) If myUrlsSection Is Nothing Then Console.WriteLine("Failed to load UrlsSection.") Else Console.WriteLine("URLs defined in app.config:") For i As Integer = 0 To myUrlsSection.Urls.Count - 1 Console.WriteLine(" Name={0} URL={1} Port={2}", myUrlsSection.Urls(i).Name, myUrlsSection.Urls(i).Url, myUrlsSection.Urls(i).Port) Next i End If Catch err As ConfigurationErrorsException Console.WriteLine("ReadCustomSection(string): {0}", err.ToString()) End Try End Sub Shared Sub Main(ByVal args() As String) ' Get the name of the application. Dim appName As String = Environment.GetCommandLineArgs()(0) ' Create a custom section and save it in the ' application configuration file. CreateCustomSection() ' Read the custom section saved in the ' application configuration file. ReadCustomSection() Console.WriteLine() Console.WriteLine("Enter any key to exit.") Console.ReadLine() End Sub End Class C# 复制 using System; using System.Configuration; class UsingConfigurationCollectionAttribute { // Create a custom section and save it in the // application configuration file. static void CreateCustomSection() { try { // Create a custom configuration section. UrlsSection myUrlsSection = new UrlsSection(); // Get the current configuration file. System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration( ConfigurationUserLevel.None); // Add the custom section to the application // configuration file. if (config.Sections["MyUrls"] == null) { config.Sections.Add("MyUrls", myUrlsSection); } // Save the application configuration file. myUrlsSection.SectionInformation.ForceSave = true; config.Save(ConfigurationSaveMode.Modified); Console.WriteLine("Created custom section in the application configuration file: {0}", config.FilePath); Console.WriteLine(); } catch (ConfigurationErrorsException err) { Console.WriteLine("CreateCustomSection: {0}", err.ToString()); } } static void ReadCustomSection() { try { // Get the application configuration file. System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration( ConfigurationUserLevel.None) as Configuration; // Read and display the custom section. UrlsSection myUrlsSection = ConfigurationManager.GetSection("MyUrls") as UrlsSection; if (myUrlsSection == null) Console.WriteLine("Failed to load UrlsSection."); else { Console.WriteLine("URLs defined in the configuration file:"); for (int i = 0; i < myUrlsSection.Urls.Count; i++) { Console.WriteLine(" Name={0} URL={1} Port={2}", myUrlsSection.Urls[i].Name, myUrlsSection.Urls[i].Url, myUrlsSection.Urls[i].Port); } } } catch (ConfigurationErrorsException err) { Console.WriteLine("ReadCustomSection(string): {0}", err.ToString()); } } static void Main(string[] args) { // Get the name of the application. string appName = Environment.GetCommandLineArgs()[0]; // Create a custom section and save it in the // application configuration file. CreateCustomSection(); // Read the custom section saved in the // application configuration file. ReadCustomSection(); Console.WriteLine(); Console.WriteLine("Enter any key to exit."); Console.ReadLine(); } }

using System;
using System.Configuration;


class UsingConfigurationCollectionAttribute
{

    // Create a custom section and save it in the 
    // application configuration file.
    static void CreateCustomSection()
    {
        try
        {

            // Create a custom configuration section.
            UrlsSection myUrlsSection = new UrlsSection();

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

            // Add the custom section to the application
            // configuration file.
            if (config.Sections["MyUrls"] == null)
            {
                config.Sections.Add("MyUrls", myUrlsSection);
            }


            // Save the application configuration file.
            myUrlsSection.SectionInformation.ForceSave = true;
            config.Save(ConfigurationSaveMode.Modified);

            Console.WriteLine("Created custom section in the application configuration file: {0}",
                config.FilePath);
            Console.WriteLine();

        }
        catch (ConfigurationErrorsException err)
        {
            Console.WriteLine("CreateCustomSection: {0}", err.ToString());
        }

    }

    static void ReadCustomSection()
    {
        try
        {
            // Get the application configuration file.
            System.Configuration.Configuration config =
                    ConfigurationManager.OpenExeConfiguration(
                    ConfigurationUserLevel.None) as Configuration;

            // Read and display the custom section.
            UrlsSection myUrlsSection =
               ConfigurationManager.GetSection("MyUrls") as UrlsSection;

            if (myUrlsSection == null)
                Console.WriteLine("Failed to load UrlsSection.");
            else
            {
                Console.WriteLine("URLs defined in the configuration file:");
                for (int i = 0; i < myUrlsSection.Urls.Count; i++)
                {
                    Console.WriteLine("  Name={0} URL={1} Port={2}",
                        myUrlsSection.Urls[i].Name,
                        myUrlsSection.Urls[i].Url,
                        myUrlsSection.Urls[i].Port);
                }
            }

        }
        catch (ConfigurationErrorsException err)
        {
            Console.WriteLine("ReadCustomSection(string): {0}", err.ToString());
        }

    }

    static void Main(string[] args)
    {

        // Get the name of the application.
        string appName =
            Environment.GetCommandLineArgs()[0];

        // Create a custom section and save it in the 
        // application configuration file.
        CreateCustomSection();

        // Read the custom section saved in the
        // application configuration file.
        ReadCustomSection();

        Console.WriteLine();
        Console.WriteLine("Enter any key to exit.");

        Console.ReadLine();
    }
}

相关资源

System.Configuration 命名空间

ConfigurationPropertyAttribute

IntegerValidatorAttribute

LongValidatorAttribute

RegexStringValidatorAttribute

StringValidatorAttribute

TimeSpanValidatorAttribute

MSDN