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<?xml version="1.0" encoding="utf-8"?>
<Type Name="VirtualPathProvider" FullName="System.Web.Hosting.VirtualPathProvider">
<TypeSignature Language="C#" Value="public abstract class VirtualPathProvider : MarshalByRefObject" />
<AssemblyInfo>
<AssemblyName>System.Web</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>System.MarshalByRefObject</BaseTypeName>
</Base>
<Interfaces />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="T:System.Web.Hosting.VirtualPathProvider" /> class provides a set of methods for implementing a virtual file system for a Web application. In a virtual file system, the files and directories are managed by a data store other than the file system provided by the server's operating system. For example, you can use a virtual file system to store content in a SQL Server database.</para>
<para>You can store any file that is processed on request in a virtual file system. This includes:</para>
<list type="bullet">
<item>
<para>ASP.NET pages, master pages, user controls, and other objects.</para>
</item>
<item>
<para>Standard Web pages with extensions such as .htm and .jpg.</para>
</item>
<item>
<para>Any custom extension mapped to a <see cref="T:System.Web.Compilation.BuildProvider" /> instance.</para>
</item>
<item>
<para>Any named theme in the App_Theme folder.</para>
</item>
</list>
<para>You cannot store ASP.NET application folders or files that generate application-level assemblies in a virtual file system. This includes:</para>
<list type="bullet">
<item>
<para>The Global.asax file.</para>
</item>
<item>
<para>Web.config files.</para>
</item>
<item>
<para>Site map data files used by the <see cref="T:System.Web.XmlSiteMapProvider" />.</para>
</item>
<item>
<para>Directories that contain application assemblies or that generate application assemblies: Bin, App_Code, App_GlobalResources, any App_LocalResources.</para>
</item>
<item>
<para>The application data folder, App_Data.</para>
</item>
</list>
<block subset="none" type="note">
<para>If a Web site is precompiled for deployment, content provided by a <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance is not compiled, and no <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instances are used by the precompiled site.</para>
</block>
<format type="text/html">
<h2>Registering a VirtualPathProvider</h2>
</format>
<para>A custom <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance should be registered with the ASP.NET compilation system by using the <see cref="M:System.Web.Hosting.HostingEnvironment.RegisterVirtualPathProvider(System.Web.Hosting.VirtualPathProvider)" /> method before any page parsing or compilation is performed by the Web application.</para>
<para>Typically, a <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance is registered in an AppInitialize method defined in the App_Code directory, or during the Application_Start event in the Global.asax file. For an example of registering a <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance in an AppInitialize method, see the Example section.</para>
<para>You can register a <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance during other events, but pages compiled and cached before the <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance is registered will not be invalidated, even if the new <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance would now provide the source for the previously compiled page.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Provides a set of methods that enable a Web application to retrieve resources from a virtual file system.</para>
</summary>
</Docs>
<Members>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected VirtualPathProvider ();" />
<MemberType>Constructor</MemberType>
<Parameters />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>When overriding the <see cref="M:System.Web.Hosting.VirtualPathProvider.#ctor" /> constructor, defer any initialization that must occur after the <see cref="T:System.Web.Hosting.VirtualPathProvider" /> object is registered to the <see cref="M:System.Web.Hosting.VirtualPathProvider.Initialize" /> method.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Initializes the class for use by an inherited class instance. This constructor can be called only by an inherited class.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="CombineVirtualPaths">
<MemberSignature Language="C#" Value="public virtual string CombineVirtualPaths (string basePath, string relativePath);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="basePath" Type="System.String" />
<Parameter Name="relativePath" Type="System.String" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Use the <see cref="M:System.Web.Hosting.VirtualPathProvider.CombineVirtualPaths(System.String,System.String)" /> method to inspect the contents of a relative path to a virtual resource and perform any modifications required. </para>
<para>The default implementation combines the <paramref name="basePath" /> and <paramref name="relativePath" /> parameters according to standard ASP.NET path processing. </para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Combines a base path with a relative path to return a complete path to a virtual resource.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The complete path to a virtual resource.</para>
</returns>
<param name="basePath">
<attribution license="cc4" from="Microsoft" modified="false" />The base path for the application.</param>
<param name="relativePath">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the virtual resource, relative to the base path.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="DirectoryExists">
<MemberSignature Language="C#" Value="public virtual bool DirectoryExists (string virtualDir);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualDir" Type="System.String" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Override the <see cref="M:System.Web.Hosting.VirtualPathProvider.DirectoryExists(System.String)" /> method to indicate to the compilation system that the resource represented by <paramref name="virtualDir" /> exists in the virtual file system provided by this <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance.</para>
<para>If your custom <see cref="T:System.Web.Hosting.VirtualPathProvider" /> class does not support directories, the <see cref="M:System.Web.Hosting.VirtualPathProvider.DirectoryExists(System.String)" /> method should return false.</para>
<block subset="none" type="note">
<para>If your virtual file system will contain themes for the Web site (by creating a virtual App_Themes directory), your custom <see cref="T:System.Web.Hosting.VirtualPathProvider" /> class must support directories.</para>
</block>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets a value that indicates whether a directory exists in the virtual file system.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>true if the directory exists in the virtual file system; otherwise, false.</para>
</returns>
<param name="virtualDir">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the virtual directory.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="FileExists">
<MemberSignature Language="C#" Value="public virtual bool FileExists (string virtualPath);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualPath" Type="System.String" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Override the <see cref="M:System.Web.Hosting.VirtualPathProvider.FileExists(System.String)" /> method to indicate to the compilation system that the resource represented by <paramref name="virtualPath" /> exists in the virtual file system provided by this <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets a value that indicates whether a file exists in the virtual file system.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>true if the file exists in the virtual file system; otherwise, false.</para>
</returns>
<param name="virtualPath">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the virtual file.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="GetCacheDependency">
<MemberSignature Language="C#" Value="public virtual System.Web.Caching.CacheDependency GetCacheDependency (string virtualPath, System.Collections.IEnumerable virtualPathDependencies, DateTime utcStart);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Web.Caching.CacheDependency</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualPath" Type="System.String" />
<Parameter Name="virtualPathDependencies" Type="System.Collections.IEnumerable" />
<Parameter Name="utcStart" Type="System.DateTime" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The default implementation of the <see cref="M:System.Web.Hosting.VirtualPathProvider.GetCacheDependency(System.String,System.Collections.IEnumerable,System.DateTime)" /> method returns null. To cache virtual resources for later use you must override either the <see cref="M:System.Web.Hosting.VirtualPathProvider.GetCacheDependency(System.String,System.Collections.IEnumerable,System.DateTime)" /> method or the <see cref="M:System.Web.Hosting.VirtualPathProvider.GetFileHash(System.String,System.Collections.IEnumerable)" /> method.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Creates a cache dependency based on the specified virtual paths.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>A <see cref="T:System.Web.Caching.CacheDependency" /> object for the specified virtual resources.</para>
</returns>
<param name="virtualPath">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the primary virtual resource.</param>
<param name="virtualPathDependencies">
<attribution license="cc4" from="Microsoft" modified="false" />An array of paths to other resources required by the primary virtual resource.</param>
<param name="utcStart">
<attribution license="cc4" from="Microsoft" modified="false" />The UTC time at which the virtual resources were read.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="GetCacheKey">
<MemberSignature Language="C#" Value="public virtual string GetCacheKey (string virtualPath);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualPath" Type="System.String" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Use the <see cref="M:System.Web.Hosting.VirtualPathProvider.GetCacheKey(System.String)" /> method to provide a custom cache key for virtual resources. If you do not override the <see cref="M:System.Web.Hosting.VirtualPathProvider.GetCacheKey(System.String)" /> method, the virtual path is used for the cache key.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Returns a cache key to use for the specified virtual path.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>A cache key for the specified virtual resource.</para>
</returns>
<param name="virtualPath">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the virtual resource.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="GetDirectory">
<MemberSignature Language="C#" Value="public virtual System.Web.Hosting.VirtualDirectory GetDirectory (string virtualDir);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Web.Hosting.VirtualDirectory</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualDir" Type="System.String" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="M:System.Web.Hosting.VirtualPathProvider.GetDirectory(System.String)" /> method returns a descendent of the <see cref="T:System.Web.Hosting.VirtualDirectory" /> class that contains the file and directories contained in the directory specified in the <paramref name="virtualDir" /> parameter.</para>
<para>If your custom <see cref="T:System.Web.Hosting.VirtualPathProvider" /> class does not support directories, the <see cref="M:System.Web.Hosting.VirtualPathProvider.GetDirectory(System.String)" /> method should return null.</para>
<block subset="none" type="note">
<para>If your virtual file system will contain themes for the Web site (by creating a virtual App_Themes directory), your custom <see cref="T:System.Web.Hosting.VirtualPathProvider" /> class must support directories.</para>
</block>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets a virtual directory from the virtual file system.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>A descendent of the <see cref="T:System.Web.Hosting.VirtualDirectory" /> class that represents a directory in the virtual file system.</para>
</returns>
<param name="virtualDir">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the virtual directory.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="GetFile">
<MemberSignature Language="C#" Value="public virtual System.Web.Hosting.VirtualFile GetFile (string virtualPath);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Web.Hosting.VirtualFile</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualPath" Type="System.String" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="M:System.Web.Hosting.VirtualPathProvider.GetFile(System.String)" /> method returns a descendent of the <see cref="T:System.Web.Hosting.VirtualFile" /> class that represents the file specified by the <paramref name="virtualPath" /> parameter.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets a virtual file from the virtual file system.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>A descendent of the <see cref="T:System.Web.Hosting.VirtualFile" /> class that represents a file in the virtual file system.</para>
</returns>
<param name="virtualPath">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the virtual file.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="GetFileHash">
<MemberSignature Language="C#" Value="public virtual string GetFileHash (string virtualPath, System.Collections.IEnumerable virtualPathDependencies);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualPath" Type="System.String" />
<Parameter Name="virtualPathDependencies" Type="System.Collections.IEnumerable" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Use the <see cref="M:System.Web.Hosting.VirtualPathProvider.GetFileHash(System.String,System.Collections.IEnumerable)" /> method to provide a hash of the dependencies for a virtual-file-system resource. </para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Returns a hash of the specified virtual paths.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>A hash of the specified virtual paths.</para>
</returns>
<param name="virtualPath">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the primary virtual resource.</param>
<param name="virtualPathDependencies">
<attribution license="cc4" from="Microsoft" modified="false" />An array of paths to other virtual resources required by the primary virtual resource.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="Initialize">
<MemberSignature Language="C#" Value="protected virtual void Initialize ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="M:System.Web.Hosting.VirtualPathProvider.Initialize" /> method is called after the provider is registered with the ASP.NET compilation system. The <see cref="M:System.Web.Hosting.VirtualPathProvider.Initialize" /> method is used to provide any initialization required after the <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance is placed into the environment the application occupies.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Initializes the <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="InitializeLifetimeService">
<MemberSignature Language="C#" Value="public override object InitializeLifetimeService ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Object</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>This method overrides the <see cref="M:System.MarshalByRefObject.InitializeLifetimeService" /> method in its base class. It always returns null and thereby prevents a lease from being created that would limit the <see cref="T:System.Web.Hosting.VirtualPathProvider" /> object's lifetime.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gives the <see cref="T:System.Web.Hosting.VirtualPathProvider" /> object an infinite lifetime by preventing a lease from being created.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Always null.</para>
</returns>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="OpenFile">
<MemberSignature Language="C#" Value="public static System.IO.Stream OpenFile (string virtualPath);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.IO.Stream</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="virtualPath" Type="System.String" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="M:System.Web.Hosting.VirtualPathProvider.OpenFile(System.String)" /> method is a convenience method that enables you to get a stream from a virtual file without creating a <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance. </para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Returns a stream from a virtual file.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>A read-only <see cref="T:System.IO.Stream" /> object for the specified virtual file or resource.</para>
</returns>
<param name="virtualPath">
<attribution license="cc4" from="Microsoft" modified="false" />The path to the virtual file.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="Previous">
<MemberSignature Language="C#" Value="protected System.Web.Hosting.VirtualPathProvider Previous { get; }" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Web.Hosting.VirtualPathProvider</ReturnType>
</ReturnValue>
<Docs>
<value>To be added.</value>
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>When a <see cref="T:System.Web.Hosting.VirtualPathProvider" /> object is registered with the ASP.NET compilation system, it is added to a chain of providers. Use the <see cref="P:System.Web.Hosting.VirtualPathProvider.Previous" /> property to hand processing off to the previous <see cref="T:System.Web.Hosting.VirtualPathProvider" /> object in the chain if the requested path is not provided by this <see cref="T:System.Web.Hosting.VirtualPathProvider" /> instance.</para>
<para>The chain of path providers always ends with the default ASP.NET provider, which serves files from the file system.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets a reference to a previously registered <see cref="T:System.Web.Hosting.VirtualPathProvider" /> object in the compilation system.</para>
</summary>
</Docs>
</Member>
</Members>
</Type>
|
