Encoding.Convert 方法
定义
重要
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将字节数组从一个编码转换为另一个编码。
重载
Convert(Encoding, Encoding, Byte[], Int32, Int32) |
将字节数组中的字节范围从一个编码转换为另一个编码。 |
Convert(Encoding, Encoding, Byte[]) |
将整个字节数组从一个编码转换为另一个编码。 |
Convert(Encoding, Encoding, Byte[], Int32, Int32)
- Source:
- Encoding.cs
- Source:
- Encoding.cs
- Source:
- Encoding.cs
将字节数组中的字节范围从一个编码转换为另一个编码。
public:
static cli::array <System::Byte> ^ Convert(System::Text::Encoding ^ srcEncoding, System::Text::Encoding ^ dstEncoding, cli::array <System::Byte> ^ bytes, int index, int count);
public static byte[] Convert (System.Text.Encoding srcEncoding, System.Text.Encoding dstEncoding, byte[] bytes, int index, int count);
static member Convert : System.Text.Encoding * System.Text.Encoding * byte[] * int * int -> byte[]
Public Shared Function Convert (srcEncoding As Encoding, dstEncoding As Encoding, bytes As Byte(), index As Integer, count As Integer) As Byte()
参数
- srcEncoding
- Encoding
源数组的编码,bytes
。
- dstEncoding
- Encoding
输出数组的编码。
- bytes
- Byte[]
要转换的字节数组。
- index
- Int32
要转换的第一个元素 bytes
的索引。
- count
- Int32
要转换的字节数。
返回
Byte[]
一个类型 Byte 数组,其中包含将一系列字节从 srcEncoding
转换为 dstEncoding
的结果(以 bytes
为单位)。
例外
index
和 count
未在字节数组中指定有效范围。
适用于
Convert(Encoding, Encoding, Byte[])
- Source:
- Encoding.cs
- Source:
- Encoding.cs
- Source:
- Encoding.cs
将整个字节数组从一个编码转换为另一个编码。
public:
static cli::array <System::Byte> ^ Convert(System::Text::Encoding ^ srcEncoding, System::Text::Encoding ^ dstEncoding, cli::array <System::Byte> ^ bytes);
public static byte[] Convert (System.Text.Encoding srcEncoding, System.Text.Encoding dstEncoding, byte[] bytes);
static member Convert : System.Text.Encoding * System.Text.Encoding * byte[] -> byte[]
Public Shared Function Convert (srcEncoding As Encoding, dstEncoding As Encoding, bytes As Byte()) As Byte()
参数
- srcEncoding
- Encoding
bytes
的编码格式。
- dstEncoding
- Encoding
目标编码格式。
- bytes
- Byte[]
要转换的字节数。
返回
Byte[]
一个类型 Byte 数组,其中包含将 bytes
从 srcEncoding
转换为 dstEncoding
的结果。
例外
示例
以下示例将 Unicode 编码的字符串转换为 ASCII 编码的字符串。 由于 ASCII 属性返回的 ASCII 编码对象使用替换回退,Pi 字符不是 ASCII 字符集的一部分,因此 Pi 字符将替换为问号,如示例中的输出所示。
using namespace System;
using namespace System::Text;
int main()
{
String^ unicodeString = "This string contains the unicode character Pi (\u03a0)";
// Create two different encodings.
Encoding^ ascii = Encoding::ASCII;
Encoding^ unicode = Encoding::Unicode;
// Convert the string into a byte array.
array<Byte>^unicodeBytes = unicode->GetBytes( unicodeString );
// Perform the conversion from one encoding to the other.
array<Byte>^asciiBytes = Encoding::Convert( unicode, ascii, unicodeBytes );
// Convert the new Byte into[] a char and[] then into a string.
array<Char>^asciiChars = gcnew array<Char>(ascii->GetCharCount( asciiBytes, 0, asciiBytes->Length ));
ascii->GetChars( asciiBytes, 0, asciiBytes->Length, asciiChars, 0 );
String^ asciiString = gcnew String( asciiChars );
// Display the strings created before and after the conversion.
Console::WriteLine( "Original String*: {0}", unicodeString );
Console::WriteLine( "Ascii converted String*: {0}", asciiString );
}
// The example displays the following output:
// Original string: This string contains the unicode character Pi (Π)
// Ascii converted string: This string contains the unicode character Pi (?)
using System;
using System.Text;
class Example
{
static void Main()
{
string unicodeString = "This string contains the unicode character Pi (\u03a0)";
// Create two different encodings.
Encoding ascii = Encoding.ASCII;
Encoding unicode = Encoding.Unicode;
// Convert the string into a byte array.
byte[] unicodeBytes = unicode.GetBytes(unicodeString);
// Perform the conversion from one encoding to the other.
byte[] asciiBytes = Encoding.Convert(unicode, ascii, unicodeBytes);
// Convert the new byte[] into a char[] and then into a string.
char[] asciiChars = new char[ascii.GetCharCount(asciiBytes, 0, asciiBytes.Length)];
ascii.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);
string asciiString = new string(asciiChars);
// Display the strings created before and after the conversion.
Console.WriteLine("Original string: {0}", unicodeString);
Console.WriteLine("Ascii converted string: {0}", asciiString);
}
}
// The example displays the following output:
// Original string: This string contains the unicode character Pi (Π)
// Ascii converted string: This string contains the unicode character Pi (?)
Imports System.Text
Class Example
Shared Sub Main()
Dim unicodeString As String = "This string contains the unicode character Pi (" & ChrW(&H03A0) & ")"
' Create two different encodings.
Dim ascii As Encoding = Encoding.ASCII
Dim unicode As Encoding = Encoding.Unicode
' Convert the string into a byte array.
Dim unicodeBytes As Byte() = unicode.GetBytes(unicodeString)
' Perform the conversion from one encoding to the other.
Dim asciiBytes As Byte() = Encoding.Convert(unicode, ascii, unicodeBytes)
' Convert the new byte array into a char array and then into a string.
Dim asciiChars(ascii.GetCharCount(asciiBytes, 0, asciiBytes.Length)-1) As Char
ascii.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0)
Dim asciiString As New String(asciiChars)
' Display the strings created before and after the conversion.
Console.WriteLine("Original string: {0}", unicodeString)
Console.WriteLine("Ascii converted string: {0}", asciiString)
End Sub
End Class
' The example displays the following output:
' Original string: This string contains the unicode character Pi (Π)
' Ascii converted string: This string contains the unicode character Pi (?)