Evidence クラスとは？ わかりやすく解説

.NET Framework クラス ライブラリ リファレンス
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Evidence クラス

セキュリティ ポリシーがアクセス許可を決定するときに使用する一連の情報を定義します。このクラスは継承できません。

名前空間: System.Security.Policy
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

Visual Basic (宣言)
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public NotInheritable Class
 Evidence
    Implements ICollection, IEnumerable
Visual Basic (使用法)
Dim instance As Evidence
C#
[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public sealed class Evidence : ICollection,
 IEnumerable
C++
[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public ref class Evidence sealed : ICollection,
 IEnumerable
J#
/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public final class Evidence implements ICollection,
 IEnumerable
JScript
SerializableAttribute 
ComVisibleAttribute(true) 
public final class Evidence implements ICollection,
 IEnumerable
解説解説

一般的な形式の証拠には、署名や、コードの発生源である場所などが含まれますが、どのような情報を含めてもかまいません。セキュリティ ポリシーによって認識される任意の型のオブジェクトが証拠を表します。

セキュリティ ポリシーは、コード グループで構成されます。アセンブリはセキュリティ アクセス許可を付与されるコードの基本単位ですが、コード グループのメンバシップ条件を満たしている場合に、そのコード グループのメンバになります。証拠とは、ポリシーに渡される一連の情報であり、アセンブリが属しているコード グループを判断するためにメンバシップ条件によって使用されます。

Evidence クラスは、証拠を表すオブジェクト セットを格納しているコレクション (ICollection のトピックを参照) です。このクラスには、証拠の提供元 (ホストおよびアセンブリ) に対応する 2 つの証拠セットが格納されます。

ポリシーは、コードに与えるアクセス許可を評価するときに、2 つの異なる提供元から証拠を取得できます。

使用例使用例

ホストおよびアセンブリが提供する 2 つの証拠を使用して、新しい Evidence クラスを作成する方法を次のコード例に示します。

Visual Basic
Imports System
Imports System.Collections
Imports System.Security
Imports System.Security.Policy
Imports System.Security.Permissions
Imports System.Globalization
Imports Microsoft.VisualBasic



Public Class Evidence_Example

    Public Function CreateEvidence() As
 Boolean
        Dim retVal As Boolean
 = True

        Try
            ' Create empty evidence using the default contructor.
            Dim ev1 As New
 Evidence
            Console.WriteLine("Created empty evidence with the
 default constructor.")

            ' Constructor used to create null host evidence.
            Dim ev2a As New
 Evidence(Nothing)
            Console.WriteLine("Created an Evidence object with
 null host evidence.")

            ' Constructor used to create host evidence.
            Dim url As New
 Url("http://www.treyresearch.com")
            Console.WriteLine(("Adding host evidence "
 & url.ToString()))
            ev2a.AddHost(url)
            Dim ev2b As New
 Evidence(ev2a)
            Console.WriteLine("Copy evidence into new evidence")
            Dim enum1 As IEnumerator = ev2b.GetHostEnumerator()
            enum1.MoveNext()
            Console.WriteLine(enum1.Current.ToString())
            ' Constructor used to create both host and assembly evidence.
            Dim oa1() As [Object]
            Dim site As New
 Site("www.wideworldimporters.com")
            Dim oa2 As [Object]() = {url, site}
            Dim ev3a As New
 Evidence(oa1, oa2)
            enum1 = ev3a.GetHostEnumerator()
            Dim enum2 As IEnumerator = ev3a.GetAssemblyEnumerator()
            enum2.MoveNext()
            Dim obj1 As [Object] = enum2.Current
            enum2.MoveNext()
            Console.WriteLine(("URL = " & obj1.ToString()
 & "  Site = " & enum2.Current.ToString()))
            ' Constructor used to create null host and null assembly
 evidence.
            Dim ev3b As New
 Evidence(Nothing, Nothing)
            Console.WriteLine("Create new evidence with null host
 and assembly evidence")

        Catch e As Exception
            Console.WriteLine("Fatal error: {0}",
 e.ToString())
            Return False
        End Try

        Return retVal
    End Function 'CreateEvidence

    Public Function DemonstrateEvidenceMembers()
 As Evidence
        Dim myEvidence As New
 Evidence
        Dim sPubKeyBlob As String
 = "00240000048000009400000006020000" & "00240000525341310004000001000100"
 & "19390E945A40FB5730204A25FA5DC4DA" & "B18688B412CB0EDB87A6EFC50E2796C9" & "B41AD3040A7E46E4A02516C598678636"
 & "44A0F74C39B7AB9C38C01F10AF4A5752" & "BFBCDF7E6DD826676AD031E7BCE63393" & "495BAD2CA4BE03B529A73C95E5B06BE7" & "35CA0F622C63E8F54171BD73E4C8F193" & "CB2664163719CA41F8159B8AC88F8CD3"
        Dim pubkey As [Byte]() = HexsToArray(sPubKeyBlob)

        ' Create a strong name.
        Dim mSN As New StrongName(New
 StrongNamePublicKeyBlob(pubkey), "SN01", New
 Version("0.0.0.0"))

        ' Create assembly and host evidence.
        Console.WriteLine("Adding assembly evidence.")
        myEvidence.AddAssembly("SN01")
        myEvidence.AddAssembly(New Version("0.0.0.0"))
        myEvidence.AddAssembly(mSN)
        Console.WriteLine(("Count of evidence items = "
 & myEvidence.Count.ToString()))
        Dim url As New Url("http://www.treyresearch.com")
        Console.WriteLine(("Adding host evidence "
 & url.ToString()))
        myEvidence.AddHost(url)
        PrintEvidence(myEvidence).ToString()
        Console.WriteLine(("Count of evidence items = "
 & myEvidence.Count.ToString()))
        Console.WriteLine(ControlChars.Lf & "Copy the evidence
 to an array using CopyTo, then display the array.")
        Dim evidenceArray(myEvidence.Count - 1) As
 Object
        myEvidence.CopyTo(evidenceArray, 0)
        Dim obj As Object
        For Each obj In
 evidenceArray
            Console.WriteLine(obj.ToString())
        Next obj
        Console.WriteLine(ControlChars.Lf & "Display the contents
 of the properties.")
        Console.WriteLine("Locked is the only property normally
 used by code.")
        Console.WriteLine("IsReadOnly, IsSynchronized, and SyncRoot
 properties are not normally used.")
        Console.WriteLine((ControlChars.Lf & "The default
 value for the Locked property = " & myEvidence.Locked.ToString()))
        Console.WriteLine(ControlChars.Lf & "Get the hashcode
 for the evidence.")
        Console.WriteLine(("HashCode = " & myEvidence.GetHashCode().ToString()))
        Console.WriteLine(ControlChars.Lf & "Get the type
 for the evidence.")
        Console.WriteLine(("Type = " & myEvidence.GetType().ToString()))
        Console.WriteLine(ControlChars.Lf & "Merge new evidence
 with the current evidence.")
        Dim oa1() As [Object]
        Dim site As New
 Site("www.wideworldimporters.com")
        Dim oa2 As [Object]() = {url, site}
        Dim newEvidence As New
 Evidence(oa1, oa2)
        myEvidence.Merge(newEvidence)

        Console.WriteLine(("Evidence count = " &
 PrintEvidence(myEvidence).ToString()))
        Console.WriteLine(ControlChars.Lf & "Remove URL evidence.")
        myEvidence.RemoveType(url.GetType())
        Console.WriteLine(("Evidence count is now: "
 & myEvidence.Count.ToString()))
        Console.WriteLine(ControlChars.Lf & "Make a copy of
 the current evidence.")
        Dim evidenceCopy As New
 Evidence(myEvidence)
        Console.WriteLine(("Count of new evidence items = "
 & evidenceCopy.Count.ToString()))
        Console.WriteLine(("Does the copy equal the current evidence?
 " & myEvidence.Equals(evidenceCopy)))
        Console.WriteLine(ControlChars.Lf & "Clear the current
 evidence.")
        myEvidence.Clear()
        Console.WriteLine(("Count is now " & myEvidence.Count.ToString()))
        Return myEvidence
    End Function 'DemonstrateEvidenceMembers

    Public Shared Function
 PrintEvidence(ByVal myEvidence As Evidence)
 As Integer
        Dim p As Integer
 = 0
        Console.WriteLine(ControlChars.Lf & "Current evidence
 = ")
        If myEvidence Is Nothing
 Then
            Return 0
        End If
        Dim list As IEnumerator = myEvidence.GetEnumerator()
        Dim obj As Object
        While list.MoveNext()
            Console.WriteLine(list.Current.ToString())
            p = p + 1
        End While
        Console.WriteLine(ControlChars.Lf)
        Return p
    End Function 'PrintEvidence

    ' Convert a hexidecimal string to an array.
    Public Shared Function
 HexsToArray(ByVal sHexString As String)
 As Byte()
        Dim array(sHexString.Length / 2) As
 [Byte]
        Dim i As Integer
        For i = 0 To sHexString.Length - 2
 Step 2
            array((i / 2)) = [Byte].Parse(sHexString.Substring(i, 2), NumberStyles.HexNumber)
        Next i
        Return array
    End Function 'HexsToArray




    ' Main method.
    Public Shared Sub Main()
        Try
            Dim EvidenceTest As New
 Evidence_Example
            Dim ret As Boolean
 = EvidenceTest.CreateEvidence()
            If ret Then
                Console.WriteLine("Evidence successfully created.")
            Else
                Console.WriteLine("Evidence creation failed.")
            End If

            EvidenceTest.DemonstrateEvidenceMembers()
        Catch e As Exception
            Console.WriteLine(e.ToString())
            Environment.ExitCode = 101
        End Try
    End Sub 'Main
End Class 'Evidence_Example
C#
using System;
using System.Collections;
using System.Security;
using System.Security.Policy;
using System.Security.Permissions;
using System.Globalization;

public class Evidence_Example
{
    public bool CreateEvidence()
    {
        bool retVal = true;

        try
        {
            // Create empty evidence using the default contructor.
            Evidence ev1 = new Evidence();
            Console.WriteLine("Created empty evidence with the default
 constructor.");

            // Constructor used to create null host evidence.
            Evidence ev2a = new Evidence(null);
            Console.WriteLine("Created an Evidence object with null
 host evidence.");

            // Constructor used to create host evidence.
            Url url = new Url("http://www.treyresearch.com");
            Console.WriteLine("Adding host evidence " + url.ToString());
            ev2a.AddHost(url);
            Evidence ev2b = new Evidence(ev2a);
            Console.WriteLine("Copy evidence into new evidence");
            IEnumerator enum1 = ev2b.GetHostEnumerator();
            enum1.MoveNext();
            Console.WriteLine(enum1.Current.ToString());
            
            // Constructor used to create both host and assembly evidence.
            Object [] oa1 = {};
            Site site = new Site("www.wideworldimporters.com");
            Object [] oa2 = { url, site };
            Evidence ev3a = new Evidence(oa1, oa2);
            enum1 = ev3a.GetHostEnumerator();
            IEnumerator enum2 = ev3a.GetAssemblyEnumerator();
            enum2.MoveNext();
            Object obj1 = enum2.Current;
            enum2.MoveNext();
            Console.WriteLine("URL = " + obj1.ToString() + "  Site
 = " + enum2.Current.ToString());
            
            // Constructor used to create null host and null assembly
 evidence.
            Evidence ev3b = new Evidence(null,
 null);
            Console.WriteLine("Create new evidence with null
 host and assembly evidence");
            
        }
        catch (Exception e)
        {
            Console.WriteLine("Fatal error: {0}", e.ToString());
            return false;
        }

        return retVal;
    }
    public Evidence DemonstrateEvidenceMembers()
    {
        Evidence myEvidence = new Evidence();
        string sPubKeyBlob =    "00240000048000009400000006020000"
 + 
            "00240000525341310004000001000100" + 
            "19390E945A40FB5730204A25FA5DC4DA" + 
            "B18688B412CB0EDB87A6EFC50E2796C9" + 
            "B41AD3040A7E46E4A02516C598678636" + 
            "44A0F74C39B7AB9C38C01F10AF4A5752" + 
            "BFBCDF7E6DD826676AD031E7BCE63393" + 
            "495BAD2CA4BE03B529A73C95E5B06BE7" + 
            "35CA0F622C63E8F54171BD73E4C8F193" + 
            "CB2664163719CA41F8159B8AC88F8CD3";
        Byte[] pubkey = HexsToArray(sPubKeyBlob);

        // Create a strong name.
        StrongName mSN = new StrongName(new
 StrongNamePublicKeyBlob(pubkey), "SN01", new Version("0.0.0.0"));

        // Create assembly and host evidence.
        Console.WriteLine("Adding assembly evidence.");
        myEvidence.AddAssembly("SN01");
        myEvidence.AddAssembly(new Version("0.0.0.0"));
        myEvidence.AddAssembly(mSN);
        Console.WriteLine("Count of evidence items = " + myEvidence.Count.ToString());
        Url url = new Url("http://www.treyresearch.com");
        Console.WriteLine("Adding host evidence " + url.ToString());
        myEvidence.AddHost(url);
        PrintEvidence(myEvidence).ToString();
        Console.WriteLine("Count of evidence items = " + myEvidence.Count.ToString());
        Console.WriteLine("\nCopy the evidence to an array using
 CopyTo, then display the array.");
        object[] evidenceArray = new object[myEvidence.Count];
        myEvidence.CopyTo(evidenceArray, 0);
        foreach (object obj in evidenceArray)
        {
            Console.WriteLine(obj.ToString());
        }
        Console.WriteLine("\nDisplay the contents of the properties.");
        Console.WriteLine("Locked is the only property normally used by code.");
        Console.WriteLine("IsReadOnly, IsSynchronized, and SyncRoot properties
 are not normally used.");
        Console.WriteLine("\nThe default value for
 the Locked property = " + myEvidence.Locked.ToString());
        
        Console.WriteLine("\nGet the hashcode for the evidence.");
        Console.WriteLine("HashCode = " + myEvidence.GetHashCode().ToString());
        Console.WriteLine("\nGet the type for the evidence.");
        Console.WriteLine("Type = " + myEvidence.GetType().ToString());
        Console.WriteLine("\nMerge new evidence with the
 current evidence.");
        Object [] oa1 = {};
        Site site = new Site("www.wideworldimporters.com");
        Object [] oa2 = { url, site };
        Evidence newEvidence = new Evidence(oa1, oa2);
        myEvidence.Merge(newEvidence);
        Console.WriteLine("Evidence count = " + PrintEvidence(myEvidence).ToString());
        Console.WriteLine("\nRemove URL evidence.");
        myEvidence.RemoveType(url.GetType());
        Console.WriteLine("Evidence count is now: " + myEvidence.Count.ToString());
        Console.WriteLine("\nMake a copy of the current evidence.");
        Evidence evidenceCopy = new Evidence(myEvidence);
        Console.WriteLine("Count of new evidence items =
 " + evidenceCopy.Count);
        Console.WriteLine("Does the copy equal the current evidence? "
 + myEvidence.Equals(evidenceCopy));
        Console.WriteLine("\nClear the current evidence.");
        myEvidence.Clear();
        Console.WriteLine("Count is now " + myEvidence.Count.ToString());
        return myEvidence;
    }
    public static int PrintEvidence(Evidence
 myEvidence)
    {
        int p = 0;
        Console.WriteLine("\nCurrent evidence = ");
        if (null == myEvidence) return
 0;
        IEnumerator list = myEvidence.GetEnumerator();
        while (list.MoveNext())
        {
            Console.WriteLine(list.Current.ToString());
        }

        Console.WriteLine("\n");
        return p;
    }
    // Convert a hexidecimal string to an array.
    public static byte[] HexsToArray(string
 sHexString)
    {
        Byte[] array = new Byte[sHexString.Length/2];
        for (int i = 0; i < sHexString.Length;
 i += 2)
        {
            array[i / 2] = Byte.Parse(sHexString.Substring(i, 2), NumberStyles.HexNumber);
        }
        return array;
    }



    // Main method.
    public static void Main()
    {
        try
        {
            Evidence_Example EvidenceTest = new Evidence_Example();
            bool ret = EvidenceTest.CreateEvidence();
            if (ret)
            {
                Console.WriteLine("Evidence successfully created.");
            }
            else
            {
                Console.WriteLine("Evidence creation failed.");
            }
            
            EvidenceTest.DemonstrateEvidenceMembers();
        }
        catch(Exception e)
        {
    
            Console.WriteLine(e.ToString());
            Environment.ExitCode = 101;
        }
    }
}
C++
using namespace System;
using namespace System::Collections;
using namespace System::Security;
using namespace System::Security::Policy;
using namespace System::Security::Permissions;
using namespace System::Globalization;
public ref class Evidence_Example
{
public:
   bool CreateEvidence()
   {
      bool retVal = true;
      try
      {
         // Create empty evidence using the default contructor.
         Evidence^ ev1 = gcnew Evidence;
         Console::WriteLine( "Created empty evidence with the default
 constructor." );

         // Constructor used to create null host evidence.
         Evidence^ ev2a = gcnew Evidence( nullptr );
         Console::WriteLine( "Created an Evidence object with null
 host evidence." );

         // Constructor used to create host evidence.
         Url^ url = gcnew Url( "http://www.treyresearch.com"
 );
         Console::WriteLine( "Adding host evidence {0}", url );
         ev2a->AddHost( url );
         Evidence^ ev2b = gcnew Evidence( ev2a );
         Console::WriteLine( "Copy evidence into new evidence"
 );
         IEnumerator^ enum1 = ev2b->GetHostEnumerator();
         enum1->MoveNext();
         Console::WriteLine( enum1->Current );

         // Constructor used to create both host and assembly evidence.
         array<Object^>^oa1 = {};
         Site^ site = gcnew Site( "www.wideworldimporters.com" );
         array<Object^>^oa2 = {url,site};
         Evidence^ ev3a = gcnew Evidence( oa1,oa2 );
         enum1 = ev3a->GetHostEnumerator();
         IEnumerator^ enum2 = ev3a->GetAssemblyEnumerator();
         enum2->MoveNext();
         Object^ obj1 = enum2->Current;
         enum2->MoveNext();
         Console::WriteLine( "URL = {0}  Site = {1}", obj1, enum2->Current
 );
         
         // Constructor used to create null host and null assembly evidence.
         Evidence^ ev3b = gcnew Evidence( nullptr,nullptr );
         Console::WriteLine( "Create new evidence with null
 host and assembly evidence" );
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( "Fatal error: {0}", e );
         return false;
      }

      return retVal;
   }

   Evidence^ DemonstrateEvidenceMembers()
   {
      Evidence^ myEvidence = gcnew Evidence;
      String^ sPubKeyBlob = "00240000048000009400000006020000"
      "00240000525341310004000001000100"
      "19390E945A40FB5730204A25FA5DC4DA"
      "B18688B412CB0EDB87A6EFC50E2796C9"
      "B41AD3040A7E46E4A02516C598678636"
      "44A0F74C39B7AB9C38C01F10AF4A5752"
      "BFBCDF7E6DD826676AD031E7BCE63393"
      "495BAD2CA4BE03B529A73C95E5B06BE7"
      "35CA0F622C63E8F54171BD73E4C8F193"
      "CB2664163719CA41F8159B8AC88F8CD3";
      array<Byte>^pubkey = HexsToArray( sPubKeyBlob );

      // Create a strong name.
      StrongName^ mSN = gcnew StrongName( gcnew StrongNamePublicKeyBlob( pubkey ),"SN01",gcnew
 Version( "0.0.0.0" ) );

      // Create assembly and host evidence.
      Console::WriteLine( "Adding assembly evidence." );
      myEvidence->AddAssembly( "SN01" );
      myEvidence->AddAssembly( gcnew Version( "0.0.0.0" ) );
      myEvidence->AddAssembly( mSN );
      Console::WriteLine( "Count of evidence items = {0}", myEvidence->Count
 );

      Url^ url = gcnew Url( "http://www.treyresearch.com"
 );
      Console::WriteLine( "Adding host evidence {0}", url );
      myEvidence->AddHost( url );
      PrintEvidence( myEvidence ).ToString();
      Console::WriteLine( "Count of evidence items = {0}", myEvidence->Count
 );

      Console::WriteLine( "\nCopy the evidence to an array using
 CopyTo, then display the array." );
      array<Object^>^evidenceArray = gcnew array<Object^>(myEvidence->Count);
      myEvidence->CopyTo( evidenceArray, 0 );
      for each (Object^ obj in evidenceArray)
      {
         Console::WriteLine(obj->ToString());
      }

      Console::WriteLine( "\nDisplay the contents of the properties." );
      Console::WriteLine( "Locked is the only property normally used by code."
 );
      Console::WriteLine( "IsReadOnly, IsSynchronized, and SyncRoot properties
 are not normally used." );
      
      Console::WriteLine( "\nThe default value for
 the Locked property = {0}", myEvidence->Locked );

      Console::WriteLine( "\nGet the hashcode for the evidence."
 );
      Console::WriteLine( "HashCode = {0}", myEvidence->GetHashCode()
 );

      Console::WriteLine( "\nGet the type for the evidence."
 );
      Console::WriteLine( "Type = {0}", myEvidence->GetType() );

      Console::WriteLine( "\nMerge new evidence with the
 current evidence." );
      array<Object^>^oa1 = {};
      Site^ site = gcnew Site( "www.wideworldimporters.com" );
      array<Object^>^oa2 = {url,site};
      Evidence^ newEvidence = gcnew Evidence( oa1,oa2 );
      myEvidence->Merge( newEvidence );
      Console::WriteLine( "Evidence count = {0}", PrintEvidence( myEvidence
 ) );

      Console::WriteLine( "\nRemove URL evidence." );
      myEvidence->RemoveType( url->GetType() );
      Console::WriteLine( "Evidence count is now: {0}", myEvidence->Count
 );

      Console::WriteLine( "\nMake a copy of the current evidence." );
      Evidence^ evidenceCopy = gcnew Evidence( myEvidence );
      Console::WriteLine( "Count of new evidence items =
 {0}", evidenceCopy->Count );
      Console::WriteLine( "Does the copy equal the current evidence? {0}",
 myEvidence->Equals( evidenceCopy ) );

      Console::WriteLine( "\nClear the current evidence." );
      myEvidence->Clear();
      Console::WriteLine( "Count is now {0}", myEvidence->Count );

      return myEvidence;
   }

   static int PrintEvidence( Evidence^ myEvidence
 )
   {
      int p = 0;
      Console::WriteLine( "\nCurrent evidence = " );
      if ( nullptr == myEvidence )
            return 0;

      IEnumerator^ list = myEvidence->GetEnumerator();
      IEnumerator^ myEnum1 = list;
      while ( myEnum1->MoveNext() )
      {
         Object^ obj = safe_cast<Object^>(myEnum1->Current);
         Console::WriteLine( obj );
         p++;
      }

      Console::WriteLine( "\n" );
      return p;
   }

   // Convert a hexadecimal string to an array.
   static array<Byte>^ HexsToArray( String^ sHexString )
   {
      array<Byte>^arr = gcnew array<Byte>(sHexString->Length / 2);
      for ( int i = 0; i < sHexString->Length;
 i += 2 )
      {
         arr[ i / 2 ] = Byte::Parse( sHexString->Substring( i, 2 ), NumberStyles::HexNumber
 );

      }
      return arr;
   }
};


// Main method.
int main()
{
   try
   {
      Evidence_Example^ EvidenceTest = gcnew Evidence_Example;
      bool ret = EvidenceTest->CreateEvidence();
      if ( ret )
      {
         Console::WriteLine( "Evidence successfully created." );
      }
      else
      {
         Console::WriteLine( "Evidence creation failed." );
      }
      EvidenceTest->DemonstrateEvidenceMembers();
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( e );
      Environment::ExitCode = 101;
   }
}
J#
import System.*;
import System.Collections.*;
import System.Security.*;
import System.Security.Policy.*;
import System.Security.Permissions.*;
import System.Globalization.*;
import System.Byte;

public class EvidenceExample
{
    public boolean CreateEvidence()
    {
        boolean retVal = true;

        try {
            // Create empty evidence using the default contructor.
            Evidence ev1 = new Evidence();
            Console.WriteLine("Created empty evidence with the " 
                + " default constructor.");

            // Constructor used to create null host evidence.
            Evidence ev2a = new Evidence(null);
            Console.WriteLine("Created an Evidence object with " 
                + " null host evidence.");

            // Constructor used to create host evidence.
            Url url = new Url("http://www.treyresearch.com");
            Console.WriteLine(("Adding host evidence " + url.ToString()));
            ev2a.AddHost(url);
            Evidence ev2b = new Evidence(ev2a);
            Console.WriteLine("Copy evidence into new evidence");

            IEnumerator enum1 = ev2b.GetHostEnumerator();
            enum1.MoveNext();
            Console.WriteLine(enum1.get_Current().ToString());

            // Constructor used to create both host and assembly evidence.
            Object oa1[] = null;
            Site site = new Site("www.wideworldimporters.com");
            Object oa2[] =  { url, site };
            Evidence ev3a = new Evidence(oa1, oa2);
            enum1 = ev3a.GetHostEnumerator();
            IEnumerator enum2 = ev3a.GetAssemblyEnumerator();
            enum2.MoveNext();
            Object obj1 = enum2.get_Current();
            enum2.MoveNext();
            Console.WriteLine(("URL = " + obj1.ToString() + "  Site
 = " 
                + enum2.get_Current().ToString()));

            // Constructor used to create null host and null assembly
 evidence.
            Evidence ev3b = new Evidence(null,
 null);
            Console.WriteLine("Create new evidence with null
 host and " 
                + " assembly evidence");
        }
        catch (System.Exception e) {
            Console.WriteLine("Fatal error: {0}", e.ToString());
            return false;
        }
        return retVal;
    } //CreateEvidence

    public Evidence DemonstrateEvidenceMembers()
    {
        Evidence myEvidence = new Evidence();
        String sPubKeyBlob = "00240000525341310004000001000100" 
            + "19390E945A40FB5730204A25FA5DC4DA" 
            + "B18688B412CB0EDB87A6EFC50E2796C9" 
            + "B41AD3040A7E46E4A02516C598678636" 
            + "44A0F74C39B7AB9C38C01F10AF4A5752" 
            + "BFBCDF7E6DD826676AD031E7BCE63393" 
            + "495BAD2CA4BE03B529A73C95E5B06BE7" 
            + "35CA0F622C63E8F54171BD73E4C8F193" 
            + "CB2664163719CA41F8159B8AC88F8CD3";
        Byte pubkey[] = HexsToArray(sPubKeyBlob);

        // Create a strong name.
        StrongName mSN = new StrongName(
            new StrongNamePublicKeyBlob((ubyte[])pubkey), "SN01",
 
                new Version("0.0.0.0"));

        // Create assembly and host evidence.
        Console.WriteLine("Adding assembly evidence.");
        myEvidence.AddAssembly("SN01");
        myEvidence.AddAssembly(new Version("0.0.0.0"));
        myEvidence.AddAssembly(mSN);
        Console.WriteLine(("Count of evidence items = " 
            + myEvidence.get_Count()));

        Url url = new Url("http://www.treyresearch.com");
        Console.WriteLine(("Adding host evidence " + url.ToString()));
        myEvidence.AddHost(url);
        String.valueOf(PrintEvidence(myEvidence));
        Console.WriteLine(("Count of evidence items = " 
            + myEvidence.get_Count()));

        Console.WriteLine("\nCopy the evidence to an array using
 CopyTo," 
            + " then display the array.");
        Object evidenceArray[] = new Object[myEvidence.get_Count()];
        myEvidence.CopyTo(evidenceArray, 0);
        for (int objCount = 0; objCount <
 evidenceArray.length; objCount++) {
            Object obj = evidenceArray[objCount];
            Console.WriteLine(obj.ToString());
        }

        Console.WriteLine("\nDisplay the contents of the properties.");
        Console.WriteLine("Locked is the only property normally used by code.");
        Console.WriteLine("IsReadOnly, IsSynchronized, and SyncRoot " 
            + " properties are not normally used.");

        Console.WriteLine(("\nThe default value for
 the Locked property = " 
            + System.Convert.ToString(myEvidence.get_Locked())));

        Console.WriteLine("\nGet the hashcode for the evidence.");
        Console.WriteLine(("HashCode = " + myEvidence.GetHashCode()));

        Console.WriteLine("\nGet the type for the evidence.");
        Console.WriteLine(("Type = " + myEvidence.GetType().ToString()));

        Console.WriteLine("\nMerge new evidence with the
 current evidence.");
        Object oa1[] = null;
        Site site = new Site("www.wideworldimporters.com");
        Object oa2[] =  { url, site };
        Evidence newEvidence = new Evidence(oa1, oa2);
        myEvidence.Merge(newEvidence);
        Console.WriteLine(("Evidence count = " + PrintEvidence(myEvidence)));

        Console.WriteLine("\nRemove URL evidence.");
        myEvidence.RemoveType(url.GetType());
        Console.WriteLine(("Evidence count is now: " + myEvidence.get_Count()));

        Console.WriteLine("\nMake a copy of the current evidence.");
        Evidence evidenceCopy = new Evidence(myEvidence);
        Console.WriteLine(("Count of new evidence items =
 " 
            + evidenceCopy.get_Count()));
        Console.WriteLine(("Does the copy equal the current evidence? "
 
            + System.Convert.ToString(myEvidence.Equals(evidenceCopy))));

        Console.WriteLine("\nClear the current evidence.");
        myEvidence.Clear();
        Console.WriteLine(("Count is now " + myEvidence.get_Count()));
        return myEvidence;
    } //DemonstrateEvidenceMembers

    public static int PrintEvidence(Evidence
 myEvidence)
    {
        int p = 0;
        Console.WriteLine("\nCurrent evidence = ");
        if (null == myEvidence) {
            return 0;
        }
        IEnumerator list = myEvidence.GetEnumerator();

        while (list.MoveNext()) {
            Console.WriteLine(String.valueOf(list.get_Current()));
        }
        Console.WriteLine("\n");
        return p;
    } //PrintEvidence

    public static System.Byte[] HexsToArray(String
 sHexString)
    {
        Byte array[] = new Byte[sHexString.get_Length() / 2];
        for (int i = 0; i < sHexString.get_Length();
 i += 2) {
            array[i / 2] = (Byte)Byte.Parse(sHexString.Substring(i, 2), 
                NumberStyles.HexNumber);
        }
        return array;
    } //HexsToArray

    public static void main(String[]
 args)
    {
        try {
            EvidenceExample EvidenceTest = new EvidenceExample();
            boolean ret = EvidenceTest.CreateEvidence();
            if (ret) {
                Console.WriteLine("Evidence successfully created.");
            }
            else {
                Console.WriteLine("Evidence creation failed.");
            }
            EvidenceTest.DemonstrateEvidenceMembers();
        }
        catch (System.Exception e) {
            Console.WriteLine(e.ToString());
            Environment.set_ExitCode(101);
        }
    } //main
} //EvidenceExample
継承階層継承階層
System.Object
  System.Security.Policy.Evidence
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバの場合は、スレッド セーフであるとは限りません。
プラットフォームプラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報バージョン情報
.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0
参照参照
関連項目
Evidence メンバ
System.Security.Policy 名前空間

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「Evidence クラス」の関連用語

1
Evidence.Equals メソッド
.NET Framework クラス ライブラリ リファレンス
78% |||||

2
SecurityManager.ResolvePolicyGroups メソッド
.NET Framework クラス ライブラリ リファレンス
76% |||||

3
IEExecuteRemote.ExecuteAsAssembly メソッド
.NET Framework クラス ライブラリ リファレンス
76% |||||

4
Evidence コンストラクタ ()
.NET Framework クラス ライブラリ リファレンス
74% |||||

5
CompilerParameters.Evidence プロパティ
.NET Framework クラス ライブラリ リファレンス
72% |||||

6
CompilerResults.Evidence プロパティ
.NET Framework クラス ライブラリ リファレンス
72% |||||

7
BaseVsaEngine.Evidence プロパティ
.NET Framework クラス ライブラリ リファレンス
70% |||||

8
VsaEngine.Evidence プロパティ
.NET Framework クラス ライブラリ リファレンス
70% |||||

9
VsaLoader.Evidence プロパティ
.NET Framework クラス ライブラリ リファレンス
70% |||||

10
XmlSerializer.FromMappings メソッド
.NET Framework クラス ライブラリ リファレンス
70% |||||

Evidence クラスのお隣キーワード

EXCEPINFO.dwHelpContext フィールド

EXCEPINFO.pfnDeferredFillIn フィールド

EXCEPINFO.pvReserved フィールド

EventWatcherOptions プロパティ

EventWatcherOptions メソッド

EventWatcherOptions メンバ

Evidence クラス

Evidence コンストラクタ

Evidence プロパティ

Evidence メソッド

Evidence メンバ

Evidence.AddAssembly メソッド

Evidence.AddHost メソッド

検索ランキング

   

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