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‎snippets/cpp/VS_Snippets_CLR_System/system.Security.Policy.Evidence/CPP/evidence_evidence.cpp‎

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//<Snippet1>
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using namespace System;
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using namespace System::Collections;
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using namespace System::Security;
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using namespace System::Security::Policy;
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using namespace System::Security::Permissions;
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using namespace System::Globalization;
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public ref class Evidence_Example
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{
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public:
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bool CreateEvidence()
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{
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bool retVal = true;
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try
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{
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// Create empty evidence using the default contructor.
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//<Snippet15>
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Evidence^ ev1 = gcnew Evidence;
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Console::WriteLine( "Created empty evidence with the default constructor." );
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//</Snippet15>
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// Constructor used to create null host evidence.
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Evidence^ ev2a = gcnew Evidence( nullptr );
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Console::WriteLine( "Created an Evidence object with null host evidence." );
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// Constructor used to create host evidence.
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//<Snippet2>
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Url^ url = gcnew Url( "http://www.treyresearch.com" );
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Console::WriteLine( "Adding host evidence {0}", url );
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ev2a->AddHost( url );
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Evidence^ ev2b = gcnew Evidence( ev2a );
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Console::WriteLine( "Copy evidence into new evidence" );
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IEnumerator^ enum1 = ev2b->GetHostEnumerator();
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enum1->MoveNext();
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Console::WriteLine( enum1->Current );
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//</Snippet2>
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// Constructor used to create both host and assembly evidence.
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//<Snippet3>
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array<Object^>^oa1 = {};
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Site^ site = gcnew Site( "www.wideworldimporters.com" );
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array<Object^>^oa2 = {url,site};
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Evidence^ ev3a = gcnew Evidence( oa1,oa2 );
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enum1 = ev3a->GetHostEnumerator();
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IEnumerator^ enum2 = ev3a->GetAssemblyEnumerator();
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enum2->MoveNext();
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Object^ obj1 = enum2->Current;
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enum2->MoveNext();
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Console::WriteLine( "URL = {0} Site = {1}", obj1, enum2->Current );
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//</Snippet3>
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// Constructor used to create null host and null assembly evidence.
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Evidence^ ev3b = gcnew Evidence( (array<Object^>^)nullptr, (array<Object^>^)nullptr );
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Console::WriteLine( "Create new evidence with null host and assembly evidence" );
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}
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catch ( Exception^ e )
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{
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Console::WriteLine( "Fatal error: {0}", e );
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return false;
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}
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return retVal;
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}
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Evidence^ DemonstrateEvidenceMembers()
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{
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Evidence^ myEvidence = gcnew Evidence;
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String^ sPubKeyBlob = "00240000048000009400000006020000"
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"00240000525341310004000001000100"
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"19390E945A40FB5730204A25FA5DC4DA"
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"B18688B412CB0EDB87A6EFC50E2796C9"
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"B41AD3040A7E46E4A02516C598678636"
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"44A0F74C39B7AB9C38C01F10AF4A5752"
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"BFBCDF7E6DD826676AD031E7BCE63393"
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"495BAD2CA4BE03B529A73C95E5B06BE7"
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"35CA0F622C63E8F54171BD73E4C8F193"
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"CB2664163719CA41F8159B8AC88F8CD3";
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array<Byte>^pubkey = HexsToArray( sPubKeyBlob );
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// Create a strong name.
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StrongName^ mSN = gcnew StrongName( gcnew StrongNamePublicKeyBlob( pubkey ),"SN01",gcnew Version( "0.0.0.0" ) );
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// Create assembly and host evidence.
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//<Snippet4>
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Console::WriteLine( "Adding assembly evidence." );
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myEvidence->AddAssembly( "SN01" );
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myEvidence->AddAssembly( gcnew Version( "0.0.0.0" ) );
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myEvidence->AddAssembly( mSN );
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Console::WriteLine( "Count of evidence items = {0}", myEvidence->Count );
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//</Snippet4>
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//<Snippet5>
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Url^ url = gcnew Url( "http://www.treyresearch.com" );
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Console::WriteLine( "Adding host evidence {0}", url );
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myEvidence->AddHost( url );
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PrintEvidence( myEvidence ).ToString();
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Console::WriteLine( "Count of evidence items = {0}", myEvidence->Count );
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//</Snippet5>
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//<Snippet6>
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Console::WriteLine( "\nCopy the evidence to an array using CopyTo, then display the array." );
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array<Object^>^evidenceArray = gcnew array<Object^>(myEvidence->Count);
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myEvidence->CopyTo( evidenceArray, 0 );
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for each (Object^ obj in evidenceArray)
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{
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Console::WriteLine(obj->ToString());
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}
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//</Snippet6>
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Console::WriteLine( "\nDisplay the contents of the properties." );
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Console::WriteLine( "Locked is the only property normally used by code." );
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Console::WriteLine( "IsReadOnly, IsSynchronized, and SyncRoot properties are not normally used." );
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//<Snippet7>
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Console::WriteLine( "\nThe default value for the Locked property = {0}", myEvidence->Locked );
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//</Snippet7>
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//<Snippet8>
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Console::WriteLine( "\nGet the hashcode for the evidence." );
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Console::WriteLine( "HashCode = {0}", myEvidence->GetHashCode() );
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//</Snippet8>
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//<Snippet9>
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Console::WriteLine( "\nGet the type for the evidence." );
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Console::WriteLine( "Type = {0}", myEvidence->GetType() );
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//</Snippet9>
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//<Snippet10>
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Console::WriteLine( "\nMerge new evidence with the current evidence." );
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array<Object^>^oa1 = {};
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Site^ site = gcnew Site( "www.wideworldimporters.com" );
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array<Object^>^oa2 = {url,site};
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Evidence^ newEvidence = gcnew Evidence( oa1,oa2 );
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myEvidence->Merge( newEvidence );
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Console::WriteLine( "Evidence count = {0}", PrintEvidence( myEvidence ) );
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//</Snippet10>
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//<Snippet11>
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Console::WriteLine( "\nRemove URL evidence." );
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myEvidence->RemoveType( url->GetType() );
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Console::WriteLine( "Evidence count is now: {0}", myEvidence->Count );
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//</Snippet11>
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//<Snippet12>
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Console::WriteLine( "\nMake a copy of the current evidence." );
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Evidence^ evidenceCopy = gcnew Evidence( myEvidence );
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Console::WriteLine( "Count of new evidence items = {0}", evidenceCopy->Count );
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Console::WriteLine( "Does the copy equal the current evidence? {0}", myEvidence->Equals( evidenceCopy ) );
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//</Snippet12>
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//<Snippet13>
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Console::WriteLine( "\nClear the current evidence." );
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myEvidence->Clear();
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Console::WriteLine( "Count is now {0}", myEvidence->Count );
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//</Snippet13>
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return myEvidence;
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}
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static int PrintEvidence( Evidence^ myEvidence )
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{
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//<Snippet14>
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int p = 0;
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Console::WriteLine( "\nCurrent evidence = " );
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if ( nullptr == myEvidence )
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return 0;
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IEnumerator^ list = myEvidence->GetEnumerator();
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IEnumerator^ myEnum1 = list;
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while ( myEnum1->MoveNext() )
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{
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Object^ obj = safe_cast<Object^>(myEnum1->Current);
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Console::WriteLine( obj );
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p++;
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}
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//</Snippet14>
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Console::WriteLine( "\n" );
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return p;
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}
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// Convert a hexadecimal string to an array.
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static array<Byte>^ HexsToArray( String^ sHexString )
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{
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array<Byte>^arr = gcnew array<Byte>(sHexString->Length / 2);
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for ( int i = 0; i < sHexString->Length; i += 2 )
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{
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arr[ i / 2 ] = Byte::Parse( sHexString->Substring( i, 2 ), NumberStyles::HexNumber );
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}
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return arr;
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}
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};
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// Main method.
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int main()
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{
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try
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{
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Evidence_Example^ EvidenceTest = gcnew Evidence_Example;
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bool ret = EvidenceTest->CreateEvidence();
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if ( ret )
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{
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Console::WriteLine( "Evidence successfully created." );
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}
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else
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{
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Console::WriteLine( "Evidence creation failed." );
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}
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EvidenceTest->DemonstrateEvidenceMembers();
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}
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catch ( Exception^ e )
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{
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Console::WriteLine( e );
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Environment::ExitCode = 101;
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}
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}
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//</Snippet1>

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