GacMembershipCondition Klasse

Definition

Namespace:

System.Security.Policy

Assembly:

System.Security.Permissions.dll

Paket:

System.Security.Permissions v9.0.0-rc.1.24431.7

Quelle:

GacMembershipCondition.cs

Bestimmt, ob eine Assembly zu einer Codegruppe gehört, indem deren Mitgliedschaft im globalen Assemblycache überprüft wird. Diese Klasse kann nicht vererbt werden.

C#

public sealed class GacMembershipCondition : System.Security.ISecurityEncodable, System.Security.Policy.IMembershipCondition

Vererbung

Object

GacMembershipCondition

Implementiert

ISecurityEncodable ISecurityPolicyEncodable IMembershipCondition

Beispiele

Im folgenden Beispiel wird die Verwendung der GacMembershipCondition -Klasse veranschaulicht.

C#

using System;
using System.Security; 
using System.Security.Policy; 
using System.Collections;

public class GacMembershipConditionDemo
{
    // Demonstrate the Copy method, which creates an identical
    // copy of the current permission.
    private bool CopyDemo()
    {
        Console.WriteLine(
            "************************************************************");
        GacMembershipCondition Gac1 = new GacMembershipCondition();
        Console.WriteLine("Original membership condition = ");
        Console.WriteLine(Gac1.ToXml().ToString());
        try
        {
            IMembershipCondition membershipCondition = Gac1.Copy();
            Console.WriteLine("Result of Copy = ");
            Console.WriteLine(
                ((GacMembershipCondition)membershipCondition).ToXml().ToString()
                );
        }
        catch (Exception e)
        {
            Console.WriteLine("Copy failed : " + Gac1.ToString() + e);
            return false;
        }

        return true;
    }
    // Demonstrate the Check method, which determines whether the specified 
    // evidence satisfies the membership condition.
    private bool CheckDemo()
    {
        Console.WriteLine(
            "************************************************************");
        GacMembershipCondition Gac1 = new GacMembershipCondition();
        GacInstalled myGac = new GacInstalled();
        try
        {
            Object [] hostEvidence = {myGac};
            Object [] assemblyEvidence = {};

            Evidence myEvidence = new Evidence(hostEvidence,assemblyEvidence);
            bool retCode = Gac1.Check(myEvidence);
            Console.WriteLine("Result of Check = " + retCode.ToString() + "\n");
        }
        catch (Exception e)
        {
            Console.WriteLine("Check failed : " + Gac1.ToString() + e);
            return false;
        }

        return true;
    }

    // Demonstrate the GetHashCode method, which returns a hash code
    // for the specified membership condition.
    private bool GetHashCodeDemo()
    {
        Console.WriteLine(
            "************************************************************");
        GacMembershipCondition Gac1 = new GacMembershipCondition();
        try
        {
            Console.WriteLine(
                "Result of GetHashCode for a GacMembershipCondition = " + 
                Gac1.GetHashCode().ToString() + "\n");
        }
        catch (Exception e)
        {
            Console.WriteLine("GetHashCode failed : " + Gac1.ToString() + e);
            return false;
        }

        return true;
    }

    // Demonstrate the ToXml and FromXml methods, including the overloads.
    // ToXml creates an XML encoding of the membership condition and its 
    // current state; FromXml reconstructs a membership condition with the 
    // specified state from the XML encoding.
    private bool ToFromXmlDemo()
    {
        Console.WriteLine(
            "************************************************************");
        try
        {
            GacMembershipCondition Gac1 = new GacMembershipCondition();
            GacMembershipCondition Gac2 = new GacMembershipCondition();

            // Roundtrip a GacMembershipCondition to and from an XML encoding.
            Gac2.FromXml(Gac1.ToXml());
            bool result = Gac2.Equals(Gac1);
            if (result)
            {
                Console.WriteLine(
                    "Result of ToXml() = " + Gac2.ToXml().ToString());
                Console.WriteLine(
                    "Result of ToFromXml roundtrip = " + Gac2.ToString());
            }
            else
            {
                Console.WriteLine(Gac2.ToString());
                Console.WriteLine(Gac1.ToString());
                return false;
            }

            GacMembershipCondition Gac3 = new GacMembershipCondition();
            GacMembershipCondition Gac4 = new GacMembershipCondition();
            IEnumerator policyEnumerator = SecurityManager.PolicyHierarchy();
            while (policyEnumerator.MoveNext())
            {
                PolicyLevel currentLevel = 
                    (PolicyLevel)policyEnumerator.Current;
                if (currentLevel.Label == "Machine")
                {
                    Console.WriteLine("Result of ToXml(level) = " + 
                        Gac3.ToXml(currentLevel));
                    Gac4.FromXml(Gac3.ToXml(), currentLevel);
                    Console.WriteLine("Result of FromXml(element, level) = " + 
                        Gac4.ToString());
                }
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("ToFromXml failed. " + e);
            return false;
        }

        return true;
    }

    // Invoke all demos.
    public bool RunDemo()
    {

        bool returnCode =true;
        bool tempReturnCode;

        // Call the Copy demo.
        if (tempReturnCode = CopyDemo())
            Console.Out.WriteLine("Copy demo completed successfully.");
        else 
            Console.Out.WriteLine("Copy demo failed.");

        returnCode = tempReturnCode && returnCode;

        // Call the Check demo.
        if (tempReturnCode = CheckDemo())
            Console.Out.WriteLine("Check demo completed successfully.");
        else 
            Console.Out.WriteLine("Check demo failed.");

        returnCode = tempReturnCode && returnCode;

        // Call the GetHashCode demo.
        if (tempReturnCode = GetHashCodeDemo())
            Console.Out.WriteLine("GetHashCode demo completed successfully.");
        else 
            Console.Out.WriteLine("GetHashCode demo failed.");

        returnCode = tempReturnCode && returnCode;

        // Call the ToFromXml demo.	
        if (tempReturnCode = ToFromXmlDemo())
            Console.Out.WriteLine("ToFromXml demo completed successfully.");
        else 
            Console.Out.WriteLine("ToFromXml demo failed.");

        returnCode = tempReturnCode && returnCode;
        return (returnCode);	
    }

    // Test harness.
    public static void Main(String[] args)
    {
        try
        {
            GacMembershipConditionDemo testcase = 
                new GacMembershipConditionDemo();
            bool returnCode = testcase.RunDemo();
            if (returnCode)
            {
                Console.Out.WriteLine(
                    "The GacMembershipCondition demo completed successfully.");
                Console.Out.WriteLine("Press the Enter key to exit.");
                string consoleInput = Console.ReadLine();
                System.Environment.ExitCode = 100;
            }
            else
            {
                Console.Out.WriteLine("The GacMembershipCondition demo failed.");
                Console.Out.WriteLine("Press the ENTER key to exit.");
                string consoleInput = Console.ReadLine();
                System.Environment.ExitCode = 101;
            }
        }
        catch (Exception e)
        {
            Console.Out.WriteLine("The GacIdentityPermission demo failed.");
            Console.WriteLine(e.ToString());
            Console.Out.WriteLine("Press the Enter key to exit.");
            string consoleInput = Console.ReadLine();
            System.Environment.ExitCode = 101;
        }
    }
}

Hinweise

Allen Assemblys, die im globalen Assemblycache installiert sind, wird der Berechtigungssatz FullTrust gewährt.

Konstruktoren

GacMembershipCondition()

Initialisiert eine neue Instanz der GacMembershipCondition-Klasse.

Methoden

Check(Evidence)	Gibt an, ob der angegebene Beweis die Mitgliedschaftsbedingung erfüllt.
Copy()	Erstellt eine äquivalente Kopie der Mitgliedschaftsbedingung.
Equals(Object)	Gibt an, ob das aktuelle Objekt und das angegebene Objekt äquivalent sind.
FromXml(SecurityElement)	Rekonstruiert ein Sicherheitsobjekt anhand der angegebenen XML-Codierung.
FromXml(SecurityElement, PolicyLevel)	Rekonstruiert ein Sicherheitsobjekt mithilfe des angegebenen Richtlinienebenenkontexts anhand der angegebenen XML-Codierung.
GetHashCode()	Ruft einen Hashcode für die aktuelle Mitgliedschaftsbedingung ab
GetType()	Ruft den Type der aktuellen Instanz ab. (Geerbt von Object)
MemberwiseClone()	Erstellt eine flache Kopie des aktuellen Object. (Geerbt von Object)
ToString()	Gibt eine Zeichenfolgendarstellung der Mitgliedschaftsbedingung zurück.
ToXml()	Erstellt eine XML-Codierung des Sicherheitsobjekts und seines aktuellen Zustands.
ToXml(PolicyLevel)	Erstellt mithilfe des angegebenen Richtlinienebenenkontexts eine XML-Codierung des Sicherheitsobjekts und ihres aktuellen Zustands.

Gilt für: