UTF7Encoding.GetDecoder Method
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Obtains a decoder that converts a UTF-7 encoded sequence of bytes into a sequence of Unicode characters.
public:
override System::Text::Decoder ^ GetDecoder();
public override System.Text.Decoder GetDecoder ();
override this.GetDecoder : unit -> System.Text.Decoder
Public Overrides Function GetDecoder () As Decoder
A Decoder that converts a UTF-7 encoded sequence of bytes into a sequence of Unicode characters.
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 namespace System;
using namespace System::Text;
using namespace System::Collections;
int main()
{
array<Char>^chars;
array<Byte>^bytes = {99,43,65,119,67,103,111,65,45};
Decoder^ utf7Decoder = Encoding::UTF7->GetDecoder();
int charCount = utf7Decoder->GetCharCount( bytes, 0, bytes->Length );
chars = gcnew array<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: " );
IEnumerator^ myEnum = chars->GetEnumerator();
while ( myEnum->MoveNext() )
{
Char c = safe_cast<Char>(myEnum->Current);
Console::Write( "[{0}]", c.ToString() );
}
Console::WriteLine();
}
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();
}
}
Imports System.Text
Class UTF7EncodingExample
Public Shared Sub Main()
Dim chars() As Char
Dim bytes() As Byte = {99, 43, 65, 119, 67, 103, 111, 65, 45}
Dim utf7Decoder As Decoder = Encoding.UTF7.GetDecoder()
Dim charCount As Integer = utf7Decoder.GetCharCount(bytes, 0, bytes.Length)
chars = New Char(charCount - 1) {}
Dim charsDecodedCount As Integer = utf7Decoder.GetChars(bytes, 0, bytes.Length, chars, 0)
Console.WriteLine("{0} characters used to decode bytes.", charsDecodedCount)
Console.Write("Decoded chars: ")
Dim c As Char
For Each c In chars
Console.Write("[{0}]", c)
Next c
Console.WriteLine()
End Sub
End Class
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.
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
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