System.Uri�Class

Summary

Provides an object representation of a uniform resource identifier (URI) and easy access to the parts of the URI.

C# Syntax:

[Serializable] public class Uri : MarshalByRefObject, ISerializable

A URI is a compact representation of a resource available to your application on the Internet. The Uri class defines the properties and methods for handling URIs, including parsing, comparing, and combining. The Uri class properties are read-only, to modify a Uri instance use the UriBuilder class.

The Uri class stores only absolute URIs (for example, "http://www.contoso.com/index.htm"). Relative URIs (for example, "/new/index.htm") must be expanded with respect to a base URI so that they are absolute. The Uri.MakeRelative method is provided to convert absolute URIs to relative URIs when necessary.

The Uri constructors will not escape URI strings if the string is a well-formed URI including a scheme identifier that contains escape sequences. The constructors will escape relative URI strings that contain a percent sign (%).

URIs are stored as canonical URIs in escaped encoding, with all characters with ASCII values greater than 127 replaced with their hexidecimal equivalents. To put the URI in canonical form, the Uri constructor performs the following steps.

• Converts the URI scheme to lower case.
• Converts the host name to lower case.
• Removes default and empty port numbers.
• Simplifies the URI by removing superfluous segments such as "/" and "/test" segments.

You can transform the contents of the Uri class from an escape encoded URI reference to a readable URI reference using the Uri.ToString method.

Some URIs include a fragment identifier or query. A fragment identifier is any text that follows a number sign (#) in the URI and is stored in the Uri.Fragment property. Query information is any text that follows a question mark (?) in the URI, and is stored in the Uri.Query property.

The following example creates an instance of the Uri class and uses it to create a WebRequest.

Uri siteUri = new Uri("http://www.contoso.com/");
 
 WebRequest wr = WebRequest.Create(siteUri);


    

System Namespace | UriBuilder

System.Uri Member List:

Public�Constructors

ctor #1	Overloaded: .ctor(string uriString) Initializes a new instance of the Uri class with the specified URI.
ctor #3	Overloaded: .ctor(string uriString, bool dontEscape) Initializes a new instance of the Uri class with the specified URI, with control of character escaping.
ctor #4	Overloaded: .ctor(Uri baseUri, string relativeUri) Initializes a new instance of the Uri class based on the specified base and relative URIs.
ctor #5	Overloaded: .ctor(Uri baseUri, string relativeUri, bool dontEscape) Initializes a new instance of the Uri class based on the specified base and releative URIs, with control of character escaping.

Public�Fields

SchemeDelimiter	Specifies the characters that separate the communication protocol scheme from the address portion of the URI. This field is read-only.
UriSchemeFile	Specifies that the URI is a pointer to a file. This field is read-only.
UriSchemeFtp	Specifies that the URI is accessed through the File Transfer Protocol (FTP). This field is read-only.
UriSchemeGopher	Specifies that the URI is accessed through the Gopher protocol. This field is read-only.
UriSchemeHttp	Specifies that the URI is accessed through the Hypertext Transfer Protocol (HTTP). This field is read-only.
UriSchemeHttps	Specifies that the URI is accessed through the Secure Hypertext Transfer Protocol (HTTPS). This field is read-only.
UriSchemeMailto	Specifies that the URI is an email address and is accessed through the Simple Network Mail Protocol (SNMP). This field is read-only.
UriSchemeNews	Specifes that the URI is an Internet news group and is accessed through the Network News Transport Protocol (NNTP). This field is read-only.
UriSchemeNntp	Specifes that the URI is an Internet news group and is accessed through the Network News Transport Protocol (NNTP). This field is read-only.

Public�Properties

AbsolutePath	Read-only Gets the absolute path of the URI.
AbsoluteUri	Read-only Gets the absolute URI.
Authority	Read-only Gets the Domain Name System (DNS) host name or IP address and the port number for a server.
Fragment	Read-only Gets the escaped fragment.
Host	Read-only Gets the Domain Name System (DNS) host name, or IP address of the server specified in the URI.
HostNameType	Read-only Returns the type of the host name specified in the URI.
IsDefaultPort	Read-only Gets a value indicating whether the port value of the URI is the default for this scheme.
IsFile	Read-only Gets a value indicating whether the specified Uri is a file URI.
IsLoopback	Read-only Gets a value indicating whether the specified Uri references the local host.
IsUnc	Read-only Gets a value indicating whether the specified Uri is a universal naming convention (UNC) path.
LocalPath	Read-only Gets a local operating-system representation of a file name.
PathAndQuery	Read-only Gets the Uri.AbsolutePath and Uri.Query properties separated by a question mark (?).
Port	Read-only Gets the port number of the specified URI.
Query	Read-only Gets any query information included in the specified URI.
Scheme	Read-only Gets the scheme name of the specified URI.
Segments	Read-only Gets an array of the segments that make up the specified URI.
UserEscaped	Read-only Indicates that the URI string was escaped before the Uri instance was created.
UserInfo	Read-only Gets the user name, password, and other user-specific information associated with the specified URI.

Public�Methods

CheckHostName	Determines whether the specified host name is valid.
CheckSchemeName	Determines whether the specified scheme name is valid.
CreateObjRef (inherited from�System.MarshalByRefObject)	See base class member description: System.MarshalByRefObject.CreateObjRef Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.
Equals	Overridden: Compares two Uri instances for equality.
FromHex	Returns the decimal value of a hexadecimal digit.
GetHashCode	Overridden: Returns the hash code for the specified URI.
GetLeftPart	Returns the specified portion of a URI.
GetLifetimeService (inherited from�System.MarshalByRefObject)	See base class member description: System.MarshalByRefObject.GetLifetimeService Retrieves the current lifetime service object that controls the lifetime policy for this instance.
GetType (inherited from�System.Object)	See base class member description: System.Object.GetType Derived from System.Object, the primary base class for all objects.
HexEscape	Converts a specified character into its hexadecimal equivalent.
HexUnescape	Converts a specified hexadecimal representation of a character to the character.
InitializeLifetimeService (inherited from�System.MarshalByRefObject)	See base class member description: System.MarshalByRefObject.InitializeLifetimeService Obtains a lifetime service object to control the lifetime policy for this instance.
IsHexDigit	Determines whether a specified character is a valid hexadecimal digit.
IsHexEncoding	Determines whether a string is hexadecimal encoded.
MakeRelative	Determines the difference between two Uri instances.
ToString	Overridden: Returns the display string for the specified Uri instance.

Protected�Constructors

ctor #2

Overloaded: .ctor(SerializationInfo serializationInfo, StreamingContext streamingContext) Initializes a new instance of the Uri class from the specified instances of the SerializationInfo and StreamingContext classes.

Protected�Methods

Canonicalize
CheckSecurity
Escape
EscapeString	Converts a string to its escaped representation.
Finalize (inherited from�System.Object)	See base class member description: System.Object.Finalize Derived from System.Object, the primary base class for all objects.
IsBadFileSystemCharacter
IsExcludedCharacter
IsReservedCharacter
MemberwiseClone (inherited from�System.Object)	See base class member description: System.Object.MemberwiseClone Derived from System.Object, the primary base class for all objects.
Parse
Unescape

Hierarchy:

• System.Object
• System.MarshalByRefObject
• System.Uri

System.Uri Member Details

Summary

Initializes a new instance of the Uri class with the specified URI.

C# Syntax:

public Uri( ���string�uriString );

uriString

A URI.

Exceptions

Exception Type	Condition
UriFormatException	uriString is empty. -or- The scheme specified in uriString is invalid. -or- uriString contains too many slashes. -or- The password specified in uriString is invalid. -or- The host name specified in uriString is invalid. -or- The file name specified in uriString is invalid.

This constructor creates a Uri instance from a URI string. It parses the URI, puts it in canonical format, and makes any required escape encodings.

The following example creates a Uri instance with the URI "http://www.contoso.com/".

Uri myUri = new Uri("http://www.contoso.com/");


    

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Summary

Initializes a new instance of the Uri class from the specified instances of the SerializationInfo and StreamingContext classes.

C# Syntax:

protected Uri( ���SerializationInfo�serializationInfo, ���StreamingContext�streamingContext );

serializationInfo

An instance of the SerializationInfo class containing the information required to serialize the new Uri instance.

streamingContext

An instance of the StreamingContext class containing the source of the serialized stream associated with the new Uri instance.

This constructor implements the ISerializable interface for the Uri class.

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Summary

Initializes a new instance of the Uri class with the specified URI, with control of character escaping.

C# Syntax:

public Uri( ���string�uriString, ���bool�dontEscape );

uriString

The URI.

dontEscape

true if the URI contains escape characters; otherwise, false.

Exceptions

Exception Type	Condition
ArgumentException	uriString is empty. -or- uriString is null.
UriFormatException	The scheme specified in uriString is invalid. -or- uriString contains too many slashes. -or- The password specified in uriString is invalid. -or- The host name specified in uriString is invalid. -or- The file name specified in uriString is invalid.

This constructor creates a Uri instance from a URI string. It parses the URI, and puts it in canonical format. The caller must set dontEscape to true if the URI is already escaped, or false if the constructor should transform the URI to its escaped encoding.

The following example creates a Uri instance for the URI http://www.contoso.com/Hello%20World.htm. Because the URI contains escaped characters, the third parameter, dontEscape, is set to true.

Uri myUri = new Uri("http://www.contoso.com/Hello%20World.htm", true);


    

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Summary

Initializes a new instance of the Uri class based on the specified base and relative URIs.

C# Syntax:

public Uri(Uri baseUri, string relativeUri( ���Uri�baseUri, ���string�relativeUri );

baseUri

The base URI.

relativeUri

The relative URI to add to the base URI.

Exceptions

Exception Type

Condition

UriFormatException

The URI formed by combining baseUri and relativeUri is empty. -or- The scheme specified in the URI formed by combining baseUri and relativeUri is invalid. -or- The URI formed by combining baseUri and relativeUri contains too many slashes. -or- The password specified in the URI formed by combining baseUri and relativeUri is invalid. -or- The host name specified in the URI formed by combining baseUri and relativeUri is invalid. -or- The file name specified in the URI formed by combining baseUri and relativeUri is invalid.

This constructor creates a Uri instance by combining the baseUri and the relativeUri. If relativeUri is an absolute URI (containing a scheme, hostname, and optionally a port number) the Uri instance is created using only relativeUri.

The following example creates a new instance of the Uri class by combining the relative URIs http://www.contoso.com and catalog/showew.htm to form the absolute URI http://www.contoso.com/catalog/shownew.htm .

Uri baseUri = new Uri("http://www.contoso.com");
 Uri myUri = new Uri(baseUri, "catalog/shownew.htm");

Console.WriteLine(myUri.ToString());
   

    

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Summary

Initializes a new instance of the Uri class based on the specified base and releative URIs, with control of character escaping.

C# Syntax:

public Uri(Uri baseUri, string relativeUri( ���Uri�baseUri, ���string�relativeUri, ���bool�dontEscape );

baseUri

The base URI.

relativeUri

The relative URI to add to the base URI.

dontEscape

true if the URI contains escape characters; otherwise, false.

Exceptions

Exception Type

Condition

UriFormatException

The URI formed by combining baseUri and relativeUri is empty. -or- The scheme specified in the URI formed by combining baseUri and relativeUri is invalid. -or- Ehe URI formed by combining baseUri and relativeUri contains too many slashes. -or- The password specified in the URI formed by combining baseUri and relativeUri is invalid. -or- The host name specified in the URI formed by combining baseUri and relativeUri is invalid. -or- The file name specified in the URI formed by combining baseUri and relativeUri is invalid.

This constructor creates a Uri instance by combining baseUri and relativeUri. If the URI passed in relativeUri is an absolute URI (containing a scheme, hostname, and optionally a port number) the Uri instance is created using only relativeUri. The caller must set dontEscape to true if the URI is already escaped.

The following example creates a new instance of the Uri class by combining the relative URIs http://www.contoso.com and Hello%20World.htm to form an absolute URI. Because the URI contains escaped characters, the third parameter, dontEscape, is set to true.

Uri baseUri = new Uri("http://www.contoso.com");
 Uri myUri = new Uri(baseUri, "Hello%20World.htm",true);
   

    

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Summary

Specifies the characters that separate the communication protocol scheme from the address portion of the URI. This field is read-only.

C# Syntax:

public static readonly string�SchemeDelimiter;

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Summary

Specifies that the URI is a pointer to a file. This field is read-only.

C# Syntax:

public static readonly string�UriSchemeFile;

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Summary

Specifies that the URI is accessed through the File Transfer Protocol (FTP). This field is read-only.

C# Syntax:

public static readonly string�UriSchemeFtp;

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Summary

Specifies that the URI is accessed through the Gopher protocol. This field is read-only.

C# Syntax:

public static readonly string�UriSchemeGopher;

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Summary

Specifies that the URI is accessed through the Hypertext Transfer Protocol (HTTP). This field is read-only.

C# Syntax:

public static readonly string�UriSchemeHttp;

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Summary

Specifies that the URI is accessed through the Secure Hypertext Transfer Protocol (HTTPS). This field is read-only.

C# Syntax:

public static readonly string�UriSchemeHttps;

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Summary

Specifies that the URI is an email address and is accessed through the Simple Network Mail Protocol (SNMP). This field is read-only.

C# Syntax:

public static readonly string�UriSchemeMailto;

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Summary

Specifes that the URI is an Internet news group and is accessed through the Network News Transport Protocol (NNTP). This field is read-only.

C# Syntax:

public static readonly string�UriSchemeNews;

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Summary

Specifes that the URI is an Internet news group and is accessed through the Network News Transport Protocol (NNTP). This field is read-only.

C# Syntax:

public static readonly string�UriSchemeNntp;

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Summary

Gets the absolute path of the URI.

C# Syntax:

public string�AbsolutePath {get;}

The Uri.AbsolutePath property contains the path information that the server uses to resolve requests for information. Typically this is the path to the desired information on the server's file system, although it also can indicate the application or script the server must run to provide the information.

The path information does not include the scheme, host name, or query portion of the URI. The Uri.AbsolutePath property always returns at least a slash (/).

The following example writes the path /catalog/shownew.htm to the console.

Uri baseUri = new Uri("http://www.contoso.com/");
 Uri myUri = new Uri(baseUri, "catalog/shownew.htm?date=today");
 
 Console.WriteLine(myUri.AbsolutePath);
   

    

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Summary

Gets the absolute URI.

C# Syntax:

public string�AbsoluteUri {get;}

The Uri.AbsoluteUri property includes the entire URI stored in the Uri instance, including all fragments and query strings.

The following example writes the complete contents of the Uri instance to the console. In the example shown, http://www.contoso.com/catalog/shownew.htm?date=today is written to the console:

Uri baseUri= new Uri("http://www.contoso.com");
 Uri myUri = new Uri(baseUri,"catalog/shownew.htm?date=today");
 Console.WriteLine(myUri.AbsoluteUri);
   

    

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Summary

Gets the Domain Name System (DNS) host name or IP address and the port number for a server.

C# Syntax:

public string�Authority {get;}

The Authority property returns the fully qualified DNS host name or IP address of the server specified in the URI, along with the port number for nondefault ports.

The following example writes the host name (www.contoso.com ) and port number (8080) of the server to the console.

 Uri baseUri = new Uri("http://www.contoso.com:8080/");
 Uri myUri = new Uri(baseUri,"shownew.htm?date=today");
 
 Console.WriteLine(myUri.Authority);
   

    

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Summary

Gets the escaped fragment.

C# Syntax:

public string�Fragment {get;}

The Uri.Fragment property gets any text following a fragment marker (#) in the URI, including the fragment marker itself. Given the URI http://www.contoso.com/index.htm#main , the fragment property would get #main.

The Uri.Fragment property is not considered in any Uri.Equals comparison.

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Summary

Gets the Domain Name System (DNS) host name, or IP address of the server specified in the URI.

C# Syntax:

public string�Host {get;}

The Uri.Host property gets the fully qualified DNS host name or IP address of the server specified in the URI.

The following example writes the host name (www.contoso.com ) of the server to the console.

Uri baseUri = new Uri("http://www.contoso.com:8080/");
Uri myUri = new Uri(baseUri, "shownew.htm?date=today");
 
 Console.WriteLine(myUri.Host);
   

    

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Summary

Returns the type of the host name specified in the URI.

C# Syntax:

public UriHostNameType�HostNameType {get;}

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Summary

Gets a value indicating whether the port value of the URI is the default for this scheme.

C# Syntax:

public bool�IsDefaultPort {get;}

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Summary

Gets a value indicating whether the specified Uri is a file URI.

C# Syntax:

public bool�IsFile {get;}

The Uri.IsFile property is true when the Uri.Scheme property equals Uri.UriSchemeFile.

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Summary

Gets a value indicating whether the specified Uri references the local host.

C# Syntax:

public bool�IsLoopback {get;}

IsLoopback returns true if the specified Uri address is either 127.0.0.1, loopback, or localhost. All other addresses return false.

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Summary

Gets a value indicating whether the specified Uri is a universal naming convention (UNC) path.

C# Syntax:

public bool�IsUnc {get;}

The Uri.IsUnc property is true if the specified Uri instance is a UNC path (suc as \\server\folder ).

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Summary

Gets a local operating-system representation of a file name.

C# Syntax:

public string�LocalPath {get;}

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Summary

Gets the Uri.AbsolutePath and Uri.Query properties separated by a question mark (?).

C# Syntax:

public string�PathAndQuery {get;}

The Uri.PathAndQuery property contains the absolute path on the server and the query information sent with the request. It is identical to concatenating the Uri.AbsolutePath and Uri.Query properties.

The Uri.PathAndQuery property is escaped according to RFC 2396.

The following example writes the URI's path (/catalog/shownew.htm) and query (date= today) information to the console.

Uri baseUri = new Uri("http://www.contoso.com/");
 Uri myUri = new Uri(baseUri, "catalog/shownew.htm?date=today");
 
 Console.WriteLine(myUri.PathAndQuery);
   

    

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Summary

Gets the port number of the specified URI.

C# Syntax:

public int�Port {get;}

The port number defines the protocol port used for contacting the server referenced in the URI. If a port is not is not specified as part of the URI, the Uri.Port property returns the default value for the protocol.

The following example writes the URI's port number to the console. In this case, the value is the default port number for HTTP, port 80.

Uri baseUri = new Uri("http://www.contoso.com/");
 Uri myUri = new Uri(baseUri,"catalog/shownew.htm?date=today");
 
 Console.WriteLine(myUri.Port);
   

    

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Summary

Gets any query information included in the specified URI.

C# Syntax:

public string�Query {get;}

The Uri.Query property contains any query information included in the URI. Query information is separated from the path information by a question mark (?) and continues to the end of the URI. The query information returned includes the leading question mark.

The query information is escaped according to RFC 2396.

The following example writes the query ?date= today to the console.

Uri baseUri = new Uri("http://www.contoso.com/");
 Uri myUri = new Uri(baseUri, "catalog/shownew.htm?date=today");
 
 Console.WriteLine(myUri.Query);
   
	. . . 
Uri baseUri = new Uri("http://www.contoso.com/");
 Uri myUri = new Uri(baseUri, "catalog/shownew.htm?date=today");
 
 Console.WriteLine(myUri.Query);
   

    

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Summary

Gets the scheme name of the specified URI.

C# Syntax:

public string�Scheme {get;}

The following table lists the valid scheme names for the Uri.Scheme property.

Scheme	Description
file	The resource is a file on the local computer.
ftp	The resource is through FTP.
gopher	The resource is accessed through the Gopher protocol.
http	The resource is accessed through HTTP.
https	The resource is accessed through secure HTTP.
mailto	The resource is an e-mail address and accessed through SMTP.
news	The resources is accessed through NNTP.

The following example writes the scheme name (http) to the console for the URI http://www.contoso.com/ .

Uri baseUri = new Uri("http://www.contoso.com/");
 Uri myUri = new Uri(baseUri, "catalog/shownew.htm?date=today");
 
 Console.WriteLine(myUri.Scheme);
   

    

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Summary

Gets an array of the segments that make up the specified URI.

C# Syntax:

public string[]�Segments {get;}

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Summary

Indicates that the URI string was escaped before the Uri instance was created.

C# Syntax:

public bool�UserEscaped {get;}

The Uri.UserEscaped property is set to true to indicate that the string used to create the Uri instance was escaped before it was passed to the constructor; that is, the dontEscape parameter of the constructor call was set to true.

The following example writes the value (true) of the Uri.UserEscaped property to the console.

Uri myUri = new Uri("http://www.contoso.com/thick%20and%20thin.htm",true);

 Console.WriteLine(myUri.UserEscaped);
   

    

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Summary

Gets the user name, password, and other user-specific information associated with the specified URI.

C# Syntax:

public string�UserInfo {get;}

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected virtual void Canonicalize();

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Summary

Determines whether the specified host name is valid.

C# Syntax:

public static UriHostNameType�CheckHostName( ���string�name );

name

The host name to validate.

Return Value:

true if the host name is valid; otherwise, false.

The Uri.CheckHostName method checks that the host name provided meets the requirements for a valid Internet host name. It does not, however, perform a host-name lookup to verify the existence of the host.

The following example checks the host name is checked for validity.

Console.WriteLine(Uri.CheckHostName("www.contoso.com"));
   

    

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Summary

Determines whether the specified scheme name is valid.

C# Syntax:

public static bool�CheckSchemeName( ���string�schemeName );

schemeName

The scheme name to validate.

Return Value:

true if the scheme name is valid; otherwise, false.

The CheckSchemeName method checks the scheme name for validity according to RFC 2396. The scheme name must begin with a letter, and must contain only letters, digits, and the characters ".", "+", or "-".

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected virtual void CheckSecurity();

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Inherited
See base class member description: System.MarshalByRefObject.CreateObjRef

Summary

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.

C# Syntax:

public virtual ObjRef�CreateObjRef( ���Type�requestedType );

requestedType

The Type of the object that the new ObjRef will reference.

Return Value:

Information required to generate a proxy.

Exceptions

Exception Type	Condition
RemotingException	This instance is not a valid remoting object.

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Summary

Compares two Uri instances for equality.

C# Syntax:

public override bool�Equals( ���object�comparand );

comparand

The Uri instance to compare with the current instance.

Return Value:

true if the two Uri instances contain the same URI; otherwise, false.

The Uri.Equals method compares two URI instances without regard to any fragments that they might contain. For instance, given the URIs http://www.contoso.com/index.htm#search and http://www.contoso.com/index.htm the Uri.Equals method would return true.

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected virtual void Escape();

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Summary

Converts a string to its escaped representation.

C# Syntax:

protected static string�EscapeString( ���string�str );

str

The string to transform to its escaped representation.

Return Value:

The escaped representation of the string.

The Uri.EscapeString method converts all characters with an ASCII value greater than 127 to hexidecimal representation.

The string is escaped according to RFC 2396.

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Inherited
See base class member description: System.Object.Finalize

C# Syntax:

~Uri();

For more information on members inherited from System.Object click on the link above.

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Summary

Returns the decimal value of a hexadecimal digit.

C# Syntax:

public static int�FromHex( ���char�digit );

digit

The hexadecimal digit (0-9, a-f, A-F) to convert.

Return Value:

A number from 1 - 15 that corresponds to the specified hexadecimal digit.

Exceptions

Exception Type	Condition
ArgumentException	digit is not a valid hexadecimal digit (0-9, a-f, A-F).

The Uri.FromHex method converts a character representing a hexadecimal digit (0-9, a-f, A-F) to its decimal value (0-15). If digit is not a valid hexadecimal digit, ArgumentException is thrown.

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Summary

Returns the hash code for the specified URI.

C# Syntax:

public override int�GetHashCode();

Return Value:

The hash value generated for the URI.

The Uri.GetHashCode method generates the URI's hash value without including any fragment identifiers. For example, the URIs http://www.contoso.com/index.htm#search and http://www.contoso.com/index.htm yield the same hash code.

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Summary

Returns the specified portion of a URI.

C# Syntax:

public string�GetLeftPart( ���UriPartial�part );

part

One of the UriPartial values that specifies the the end of the portion of the URI to return.

Return Value:

A string containing the specified portion of the URI.

The Uri.GetLeftPart method returns a string containing the left-most portion of the URI, ending with the portion specified by part. The string returned includes delimiters but does not include any fragments or queries or their delimiters, except in certain cases.

Uri.GetLeftPart includes delimiters in the following cases:

• UriPartial.Scheme has the scheme delimiter added.
• UriPartial.Authority does not have the path delimiter added.
• UriPartial.Path includes any delimiters in the original URI up to the query or fragment delimiter.

The following examples show a URI and the results of calling Uri.GetLeftPart with UriPartial.Scheme, UriPartial.Authority, or UriPartial.Path.

URI	Scheme	Authority	Path
http://www.contoso.com/index.htm#main	http://	http://www.contoso.com	http://www.contoso.com/
mailto:user@contoso.com?subject=uri	mailto:		mailto:user@contoso.com
nntp://news.contoso.com/123456@contoso.com	nntp://	nntp://news.contoso.com	nntp://news.contoso.com/123456@contoso.com
news:123456@contoso.com	news:		news:123456@contoso.com
file://server/filename.ext	file://	file://server	file://server/filename.ext
file:/filename.ext	file:		file:/filename.ext

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Inherited
See base class member description: System.MarshalByRefObject.GetLifetimeService

Summary

Retrieves the current lifetime service object that controls the lifetime policy for this instance.

C# Syntax:

public object�GetLifetimeService();

Return Value:

An object of type ILease used to control the lifetime policy for this instance.

For more information about lifetime services, see the LifetimeServices class.

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Inherited
See base class member description: System.Object.GetType

C# Syntax:

public Type�GetType();

For more information on members inherited from System.Object click on the link above.

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Summary

Converts a specified character into its hexadecimal equivalent.

C# Syntax:

public static string�HexEscape( ���char�character );

character

The character to convert to hexadecimal representation.

Return Value:

The hexadecimal representation of the specified character.

Exceptions

Exception Type	Condition
ArgumentOutOfRangeException	character is greater than 255.

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Summary

Converts a specified hexadecimal representation of a character to the character.

C# Syntax:

public static char�HexUnescape( ���string�pattern, ���ref�int index );

pattern

The hexadecimal representation of a character.

index

The location in pattern where the hexadecimal representation of a character begins.

Return Value:

The character represented by the hexadecimal encoding at position index. If the character at index is not hexadecimal encoded, the character at index is returned. The value of index is incremented to point to the character following the one returned.

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Inherited
See base class member description: System.MarshalByRefObject.InitializeLifetimeService

Summary

Obtains a lifetime service object to control the lifetime policy for this instance.

C# Syntax:

public virtual object�InitializeLifetimeService();

Return Value:

An object of type ILease used to control the lifetime policy for this instance. This is the current lifetime service object for this instance if one exists; otherwise, a new lifetime service object initialized to the value of the LifetimeServices.LeaseManagerPollTime property.

For more information about lifetime services, see the LifetimeServices class.

The following code example demonstrates creating a lease.

 public class MyClass : MarshalByRefObject
 {
   public override Object InitializeLifetimeService()
   {
     ILease lease = (ILease)base.InitializeLifetimeService();
     if (lease.CurrentState == LeaseState.Initial)
     {
          lease.InitialLeaseTime = TimeSpan.FromMinutes(1);
          lease.SponsorshipTimeout = TimeSpan.FromMinutes(2);
           lease.RenewOnCallTime = TimeSpan.FromSeconds(2);
     }
       return lease;
   }
 }

    

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected virtual bool IsBadFileSystemCharacter( ���char�character );

character

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected static bool IsExcludedCharacter( ���char�character );

character

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Summary

Determines whether a specified character is a valid hexadecimal digit.

C# Syntax:

public static bool�IsHexDigit( ���char�character );

character

The character to validate.

Return Value:

true if the character is a valid hexadecimal digit; otherwise false.

Hexadecimal digits are the digits 0-9 and the letters A-F or a-f.

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Summary

Determines whether a string is hexadecimal encoded.

C# Syntax:

public static bool�IsHexEncoding( ���string�pattern, ���int�index );

pattern

The string to check.

index

The location in pattern to check for hexadecimal encoding.

Return Value:

true if pattern is hexadecimal encoded at the specified location; otherwise, false.

The Uri.IsHexEncoding method checks for hexadecimal encoding that follows the pattern "%hexhex" in a string, where "hex" is a digit from 0-9 or or a letter from A-F (case-insensitive).

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected virtual bool IsReservedCharacter( ���char�character );

character

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Summary

Determines the difference between two Uri instances.

C# Syntax:

public string�MakeRelative( ���Uri�toUri );

toUri

The URI to compare to the current URI.

Return Value:

If the two URIs are the same except for the path information, then that difference; if the two have additional differences, the absolute URI of toUri.

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Inherited
See base class member description: System.Object.MemberwiseClone

C# Syntax:

protected object�MemberwiseClone();

For more information on members inherited from System.Object click on the link above.

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected virtual void Parse();

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Summary

Returns the display string for the specified Uri instance.

C# Syntax:

public override string�ToString();

Return Value:

The string containing the unescaped display name of the Uri.

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Summary

This type supports the Shared Source CLI infrastructure and is not intended to be used directly from your code.

C# Syntax:

protected virtual string Unescape( ���string�path );

path

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