UTF7Encoding.GetDecoder Method ()

 

Obtains a decoder that converts a UTF-7 encoded sequence of bytes into a sequence of Unicode characters.

Namespace:   System.Text
Assembly:  mscorlib (in mscorlib.dll)

public override Decoder GetDecoder()

Return Value

Type: System.Text.Decoder

A Decoder that converts a UTF-7 encoded sequence of bytes into a sequence of Unicode characters.

The Decoder.GetChars method converts sequential blocks of bytes into sequential blocks of characters, in a manner similar to the GetChars method of this class. However, a Decoder maintains state information between calls so it can correctly decode byte sequences that span blocks. The Decoder also preserves trailing bytes at the end of data blocks and uses the trailing bytes in the next decoding operation. Therefore, GetDecoder and GetEncoder are useful for network transmission and file operations, because those operations often deal with blocks of data instead of a complete data stream.

The following code example demonstrates how to use the GetDecoder method to obtain a decoder to convert the UTF-7 encoded bytes into a sequence of characters.

using System;
using System.Text;

class UTF7EncodingExample {
    public static void Main() {
        Char[] chars;
        Byte[] bytes = new Byte[] {
            99, 43, 65, 119, 67, 103, 111, 65, 45
        };

        Decoder utf7Decoder = Encoding.UTF7.GetDecoder();

        int charCount = utf7Decoder.GetCharCount(bytes, 0, bytes.Length);
        chars = new Char[charCount];
        int charsDecodedCount = utf7Decoder.GetChars(bytes, 0, bytes.Length, chars, 0);

        Console.WriteLine(
            "{0} characters used to decode bytes.", charsDecodedCount
        );

        Console.Write("Decoded chars: ");
        foreach (Char c in chars) {
            Console.Write("[{0}]", c);
        }
        Console.WriteLine();
    }
}

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
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