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ToBase64Transform Class
Visual Studio 2010
Converts a CryptoStream to base 64.
Assembly: mscorlib (in mscorlib.dll)
The ToBase64Transform type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | CanReuseTransform | Gets a value indicating whether the current transform can be reused. |
![]() | CanTransformMultipleBlocks | Gets a value that indicates whether multiple blocks can be transformed. |
![]() | InputBlockSize | Gets the input block size. |
![]() | OutputBlockSize | Gets the output block size. |
| Name | Description | |
|---|---|---|
![]() | Clear | Releases all resources used by the ToBase64Transform. |
![]() | Dispose() | Releases all resources used by the current instance of the ToBase64Transform class. |
![]() | Dispose(Boolean) | Releases the unmanaged resources used by the ToBase64Transform and optionally releases the managed resources. |
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Releases the unmanaged resources used by the ToBase64Transform. (Overrides Object::Finalize().) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
![]() | TransformBlock | Converts the specified region of the input byte array to base 64 and copies the result to the specified region of the output byte array. |
![]() | TransformFinalBlock | Converts the specified region of the specified byte array to base 64. |
The following code example demonstrates how to use members of the ToBase64Transform class.
using namespace System; using namespace System::IO; using namespace System::Security::Cryptography; ref class Members { public: [STAThread] static void Main() { String^ appPath = (String::Concat( System::IO::Directory::GetCurrentDirectory(), L"\\" )); // Insert your file names into this method call. EncodeFromFile( String::Concat( appPath, L"members.cpp" ), String::Concat( appPath, L"members.enc" ) ); Console::WriteLine( L"This sample completed successfully; " L"press Enter to exit." ); Console::ReadLine(); } private: // Read in the specified source file and write out an encoded target file. static void EncodeFromFile( String^ sourceFile, String^ targetFile ) { // Verify members.cpp exists at the specified directory. if ( !File::Exists( sourceFile ) ) { Console::Write( L"Unable to locate source file located at " ); Console::WriteLine( L"{0}.", sourceFile ); Console::Write( L"Please correct the path and run the " ); Console::WriteLine( L"sample again." ); return; } // Retrieve the input and output file streams. FileStream^ inputFileStream = gcnew FileStream( sourceFile,FileMode::Open,FileAccess::Read ); FileStream^ outputFileStream = gcnew FileStream( targetFile,FileMode::Create,FileAccess::Write ); // Create a new ToBase64Transform object to convert to base 64. ToBase64Transform^ base64Transform = gcnew ToBase64Transform; // Create a new byte array with the size of the output block size. array<Byte>^outputBytes = gcnew array<Byte>( base64Transform->OutputBlockSize); // Retrieve the file contents into a byte array. array<Byte>^inputBytes = gcnew array<Byte>(inputFileStream->Length); inputFileStream->Read( inputBytes, 0, inputBytes->Length ); // Verify that multiple blocks can not be transformed. if ( !base64Transform->CanTransformMultipleBlocks ) { // Initializie the offset size. int inputOffset = 0; // Iterate through inputBytes transforming by blockSize. int inputBlockSize = base64Transform->InputBlockSize; while ( inputBytes->Length - inputOffset > inputBlockSize ) { base64Transform->TransformBlock( inputBytes, inputOffset, inputBytes->Length - inputOffset, outputBytes, 0 ); inputOffset += base64Transform->InputBlockSize; outputFileStream->Write( outputBytes, 0, base64Transform->OutputBlockSize ); } // Transform the final block of data. outputBytes = base64Transform->TransformFinalBlock( inputBytes, inputOffset, inputBytes->Length - inputOffset ); outputFileStream->Write( outputBytes, 0, outputBytes->Length ); Console::WriteLine( L"Created encoded file at {0}", targetFile ); } // Determine if the current transform can be reused. if ( !base64Transform->CanReuseTransform ) { // Free up any used resources. base64Transform->Clear(); } // Close file streams. inputFileStream->Close(); outputFileStream->Close(); } }; int main() { Members::Main(); } // // This sample produces the following output: // // Created encoded file at C:\ConsoleApplication1\\membersvcs.enc // This sample completed successfully; press Enter to exit.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
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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