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WebRequest.Create Method (String)

Initializes a new WebRequest instance for the specified URI scheme.

Namespace:  System.Net
Assemblies:   System.Net.Requests (in System.Net.Requests.dll)
  System (in System.dll)

static member Create : 
        requestUriString:string -> WebRequest

Parameters

requestUriString
Type: System.String

The URI that identifies the Internet resource.

Return Value

Type: System.Net.WebRequest
A WebRequest descendant for the specific URI scheme.

ExceptionCondition
NotSupportedException

The request scheme specified in requestUriString has not been registered.

ArgumentNullException

requestUriString is a null reference (Nothing in Visual Basic).

SecurityException

The caller does not have permission to connect to the requested URI or a URI that the request is redirected to.

UriFormatException
NoteNote

In the .NET for Windows Store apps or the Portable Class Library, catch the base class exception, FormatException, instead.

The URI specified in requestUriString is not a valid URI.

The Create method returns a descendant of the WebRequest class determined at run time as the closest registered match for requestUri.

For example, when a URI beginning with http:// or https:// is passed in requestUri, an HttpWebRequest is returned by Create. If a URI beginning with ftp:// is passed instead, the Create method will return a FileWebRequest instance. If a URI beginning with file:// is passed instead, the Create method will return a FileWebRequest instance.

The pre-registered reserve types already registered include the following:

  • http://

  • https://

  • ftp://

  • file://

The .NET Framework includes support for the http://, https://, ftp://, and file:// URI schemes. Custom WebRequest descendants to handle other requests are registered with the RegisterPrefix method.

The Create method uses the requestUriString parameter to create a Uri instance that it passes to the new WebRequest.

NoteNote

This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing in the .NET Framework.

The following example uses Create to instantiate an HttpWebRequest instance. A string representing the target URL is used as the constructor parameter.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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