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UrlIdentityPermissionAttribute Class

Allows security actions for UrlIdentityPermission to be applied to code using declarative security. This class cannot be inherited.

For a list of all members of this type, see UrlIdentityPermissionAttribute Members.

System.Object
   System.Attribute
      System.Security.Permissions.SecurityAttribute
         System.Security.Permissions.CodeAccessSecurityAttribute
            System.Security.Permissions.UrlIdentityPermissionAttribute

[Visual Basic]
<AttributeUsage(AttributeTargets.Assembly Or AttributeTargets.Class _
   Or AttributeTargets.Struct Or AttributeTargets.Constructor Or _
   AttributeTargets.Method)>
<Serializable>
NotInheritable Public Class UrlIdentityPermissionAttribute
   Inherits CodeAccessSecurityAttribute
[C#]
[AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class
   | AttributeTargets.Struct | AttributeTargets.Constructor |
   AttributeTargets.Method)]
[Serializable]
public sealed class UrlIdentityPermissionAttribute :
   CodeAccessSecurityAttribute
[C++]
[AttributeUsage(AttributeTargets::Assembly |
   AttributeTargets::Class | AttributeTargets::Struct |
   AttributeTargets::Constructor | AttributeTargets::Method)]
[Serializable]
public __gc __sealed class UrlIdentityPermissionAttribute :
   public CodeAccessSecurityAttribute
[JScript]
public
   AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class |
   AttributeTargets.Struct | AttributeTargets.Constructor |
   AttributeTargets.Method)
 Serializable
class UrlIdentityPermissionAttribute extends
   CodeAccessSecurityAttribute

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Remarks

The complete URL is considered, including the protocol (HTTP, HTTPS, FTP) and the file. For example, http://www.fourthcoffee.com/process/grind.htm is a complete URL.

The scope of the declaration that is allowed depends on the SecurityAction that is used.

The security information declared by a security attribute is stored in the metadata of the attribute target and is accessed by the system at run time. Security attributes are used only for declarative security. For imperative security, use the corresponding permission class.

Example

[Visual Basic, C#, C++] The following example of a declarative attribute shows the correct way to request UrlIdentityPermission and states that you must have the specified URL identity to run your code. Code will execute only if run from the specified URL.

[Visual Basic] 
<Assembly:UrlIdentityPermissionAttribute(SecurityAction.RequestMinimum, _
Url := "http://example.microsoft.com/sample/sampleapp.exe")> 
'In Visual Basic, you must specify that you are using the assembly scope when making a request.

[C#] 
[assembly:UrlIdentityPermissionAttribute(SecurityAction.RequestMinimum, 
 Url="http://example.microsoft.com/sample/sampleapp.exe")]
 //In C#, you must specify that you are using the assembly scope when making a request. 

[C++] 
[assembly:UrlIdentityPermissionAttribute(SecurityAction::RequestMinimum, 
 Url=S"http://example.microsoft.com/sample/sampleapp.exe")];
 //In C++, you must specify that you are using the assembly scope when making a request. 

[Visual Basic, C#, C++] The following example shows how to demand that the calling code has the specified URL identity at link time. Code will execute only if run from the specified URL.

[Visual Basic] 
<UrlIdentityPermissionAttribute(SecurityAction.Demand, _
 Url := "http://example.microsoft.com/sample/sampleapp.exe")> _
 Public Class SampleClass

[C#] 
[UrlIdentityPermissionAttribute(SecurityAction.Demand, Url="http://example.microsoft.com/sample/sampleapp.exe")]


[C++] 
[UrlIdentityPermissionAttribute(SecurityAction::Demand, Url=S"http://example.microsoft.com/sample/sampleapp.exe")]

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Namespace: System.Security.Permissions

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Assembly: Mscorlib (in Mscorlib.dll)

See Also

UrlIdentityPermissionAttribute Members | System.Security.Permissions Namespace | Extending Metadata Using Attributes | UrlIdentityPermission | Url | UrlMembershipCondition

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