FileInfo.CreateText()编码有关问题

FileInfo.CreateText()编码问题
用下面的代码写入文件编码为：ansi

C# code

            FileInfo fi = new FileInfo(FILE_NAME);            if (!fi.Exists)            {                using (StreamWriter sw = fi.CreateText())                {                    sw.WriteLine("hello word");                    sw.Close();                }            }

用下面的代码写入文件编码为：utf-8

C# code

            using (StreamWriter sw = new StreamWriter(FILE_NAME, true, Encoding.UTF8))            {                sw.WriteLine("hello word");                sw.Close();            }

如何通过FileInfo来实现UTF-8编码？ CreateText()并无重载。

如何先 FileInfo.Create()。然后再 new StreamWriter(FILE_NAME, true, Encoding.UTF8))。文件会是独占状态。


[解决办法]

C# code

using System;using System.IO;using System.Text;class Test {    public static void Main()     {         string path = @"c: test.txt";         FileInfo fi = new FileInfo(path);        // Delete the file if it exists.        if (fi.Exists)         {             fi.Delete();         }        //Create the file.        using (FileStream fs = fi.Create())         {             Byte[] info =                 new UTF8Encoding(true).GetBytes("This is some text in the file.");            //Add some information to the file.             fs.Write(info, 0, info.Length);         }        //Open the stream and read it back.        using (StreamReader sr = fi.OpenText())         {            string s = "";            while ((s = sr.ReadLine()) != null)             {                 Console.WriteLine(s);             }         }     }}FileInfo.OpenText 方法：创建使用 UTF8 编码、从现有文本文件中进行读取的 StreamReader。返回值：使用 UTF8 编码的新 StreamReader。 FileInfo.CreateText 方法：创建写入新文本文件的 StreamWriter。 返回值：新的StreamWriter。下面说明 CreateText 方法和OpenText 方法。using System;using System.IO;class Test {    public static void Main()     {        string path = @"c: test.txt";        FileInfo fi = new FileInfo(path);        if (!fi.Exists)         {            //Create a file to write to.            using (StreamWriter sw = fi.CreateText())             {                sw.WriteLine("Hello");                sw.WriteLine("And");                sw.WriteLine("Welcome");            }        }        //Open the file to read from.        using (StreamReader sr = fi.OpenText())         {            string s = "";            while ((s = sr.ReadLine()) != null)             {                Console.WriteLine(s);            }        }    }} 

 

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