本文整理匯總了C#中System.Text.UTF8Encoding.GetPreamble方法的典型用法代碼示例。如果您正苦於以下問題：C# UTF8Encoding.GetPreamble方法的具體用法？C# UTF8Encoding.GetPreamble怎麽用？C# UTF8Encoding.GetPreamble使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Text.UTF8Encoding的用法示例。
在下文中一共展示了UTF8Encoding.GetPreamble方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: Main
//引入命名空間
using System;
using System.Text;
class Example
{
public static void Main()
{
// The default constructor does not provide a preamble.
UTF8Encoding UTF8NoPreamble = new UTF8Encoding();
UTF8Encoding UTF8WithPreamble = new UTF8Encoding(true);
Byte[] preamble;
preamble = UTF8NoPreamble.GetPreamble();
Console.WriteLine("UTF8NoPreamble");
Console.WriteLine(" preamble length: {0}", preamble.Length);
Console.Write(" preamble: ");
ShowArray(preamble);
Console.WriteLine();
preamble = UTF8WithPreamble.GetPreamble();
Console.WriteLine("UTF8WithPreamble");
Console.WriteLine(" preamble length: {0}", preamble.Length);
Console.Write(" preamble: ");
ShowArray(preamble);
}
public static void ShowArray(Byte[] bytes)
{
foreach (var b in bytes)
Console.Write("{0:X2} ", b);
Console.WriteLine();
}
}輸出：
UTF8NoPreamble preamble length: 0 preamble: UTF8WithPreamble preamble length: 3 preamble: EF BB BF
示例2: Main
//引入命名空間
using System;
using System.IO;
using System.Text;
public class Example
{
public static void Main()
{
String s = "This is a string to write to a file using UTF-8 encoding.";
// Write a file using the default constructor without a BOM.
var enc = new UTF8Encoding();
Byte[] bytes = enc.GetBytes(s);
WriteToFile(@".\NoPreamble.txt", enc, bytes);
// Use BOM.
enc = new UTF8Encoding(true);
WriteToFile(@".\Preamble.txt", enc, bytes);
}
private static void WriteToFile(String fn, Encoding enc, Byte[] bytes)
{
var fs = new FileStream(fn, FileMode.Create);
Byte[] preamble = enc.GetPreamble();
fs.Write(preamble, 0, preamble.Length);
Console.WriteLine("Preamble has {0} bytes", preamble.Length);
fs.Write(bytes, 0, bytes.Length);
Console.WriteLine("Wrote {0} bytes to {1}.", fs.Length, fn);
fs.Close();
Console.WriteLine();
}
}輸出：
Preamble has 0 bytes Wrote 57 bytes to NoPreamble.txt. Preamble has 3 bytes Wrote 60 bytes to Preamble.txt.