本文整理汇总了C#中System.Text.UTF8Encoding类的典型用法代码示例。如果您正苦于以下问题：C# UTF8Encoding类的具体用法？C# UTF8Encoding怎么用？C# UTF8Encoding使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
UTF8Encoding类属于System.Text命名空间，在下文中一共展示了UTF8Encoding类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
//引入命名空间
using System;
using System.Text;
class Example
{
public static void Main()
{
// Create a UTF-8 encoding.
UTF8Encoding utf8 = new UTF8Encoding();
// A Unicode string with two characters outside an 8-bit code range.
String unicodeString =
"This Unicode string has 2 characters outside the " +
"ASCII range:\n" +
"Pi (\u03a0), and Sigma (\u03a3).";
Console.WriteLine("Original string:");
Console.WriteLine(unicodeString);
// Encode the string.
Byte[] encodedBytes = utf8.GetBytes(unicodeString);
Console.WriteLine();
Console.WriteLine("Encoded bytes:");
for (int ctr = 0; ctr < encodedBytes.Length; ctr++) {
Console.Write("{0:X2} ", encodedBytes[ctr]);
if ((ctr + 1) % 25 == 0)
Console.WriteLine();
}
Console.WriteLine();
// Decode bytes back to string.
String decodedString = utf8.GetString(encodedBytes);
Console.WriteLine();
Console.WriteLine("Decoded bytes:");
Console.WriteLine(decodedString);
}
}输出：
Original string: This Unicode string has 2 characters outside the ASCII range: Pi (π), and Sigma (Σ). Encoded bytes: 54 68 69 73 20 55 6E 69 63 6F 64 65 20 73 74 72 69 6E 67 20 68 61 73 20 32 20 63 68 61 72 61 63 74 65 72 73 20 6F 75 74 73 69 64 65 20 74 68 65 20 41 53 43 49 49 20 72 61 6E 67 65 3A 20 0D 0A 50 69 20 28 CE A0 29 2C 20 61 6E 64 20 53 69 67 6D 61 20 28 CE A3 29 2E Decoded bytes: This Unicode string has 2 characters outside the ASCII range: Pi (π), and Sigma (Σ).
示例2: Main
//引入命名空间
using System;
using System.IO;
using System.Text;
public class Example
{
public static void Main()
{
// Create a UTF-8 encoding that supports a BOM.
Encoding utf8 = new UTF8Encoding(true);
// A Unicode string with two characters outside an 8-bit code range.
String unicodeString =
"This Unicode string has 2 characters outside the " +
"ASCII range:\n" +
"Pi (\u03A0)), and Sigma (\u03A3).";
Console.WriteLine("Original string:");
Console.WriteLine(unicodeString);
Console.WriteLine();
// Encode the string.
Byte[] encodedBytes = utf8.GetBytes(unicodeString);
Console.WriteLine("The encoded string has {0} bytes.",
encodedBytes.Length);
Console.WriteLine();
// Write the bytes to a file with a BOM.
var fs = new FileStream(@".\UTF8Encoding.txt", FileMode.Create);
Byte[] bom = utf8.GetPreamble();
fs.Write(bom, 0, bom.Length);
fs.Write(encodedBytes, 0, encodedBytes.Length);
Console.WriteLine("Wrote {0} bytes to the file.", fs.Length);
fs.Close();
Console.WriteLine();
// Open the file using StreamReader.
var sr = new StreamReader(@".\UTF8Encoding.txt");
String newString = sr.ReadToEnd();
sr.Close();
Console.WriteLine("String read using StreamReader:");
Console.WriteLine(newString);
Console.WriteLine();
// Open the file as a binary file and decode the bytes back to a string.
fs = new FileStream(@".\UTF8Encoding.txt", FileMode.Open);
Byte[] bytes = new Byte[fs.Length];
fs.Read(bytes, 0, (int)fs.Length);
fs.Close();
String decodedString = utf8.GetString(bytes);
Console.WriteLine("Decoded bytes:");
Console.WriteLine(decodedString);
}
}输出：
Original string: This Unicode string has 2 characters outside the ASCII range: Pi (π), and Sigma (Σ). The encoded string has 88 bytes. Wrote 91 bytes to the file. String read using StreamReader: This Unicode string has 2 characters outside the ASCII range: Pi (π), and Sigma (Σ). Decoded bytes: This Unicode string has 2 characters outside the ASCII range: Pi (π), and Sigma (Σ).