Question

为什么读出的文件是这样？？？

.txt
This is a Test !

我的代码如下:

byte[] mydate = new byte[100];
char[] mychar = new char[100];

FileStream aFile = null;
aFile = new FileStream(@"E:\ztx\website\File\abce.txt", FileMode.Open);
aFile.Seek(0, SeekOrigin.Begin);
aFile.Read(mydate, 0, 100);

Decoder ex = Encoding.UTF8.GetDecoder();
ex.GetChars(mydate, 0, mydate.Length, mychar, 0);
Response.Write(mychar);
aFile.Close();
return;

页面显示结果:System.Char[]

Answer 1

你读文件用StreamReader，写文件用：StreamWriter比较方便一点
例子：
//创建文件
public static void CreateFile()
{
StreamWriter sw;
sw = File.CreateText("c:\\test.txt");
sw.WriteLine("This is the first line!");
sw.WriteLine("This is the Second line!");
sw.Close();
Console.WriteLine("文件建立成功！");
}
//读文件
private static void ReadFile(string path)
{
StreamReader sr;
sr = File.OpenText(path);
string line;
line = sr.ReadLine();
while(line != null)
{
Console.WriteLine(line);
line = sr.ReadLine();
}
sr.Close();
}
//追加文件
private static void AppendFile(string path)
{
StreamWriter sw;
sw = File.AppendText(path);
sw.WriteLine("哈哈，追加成功了！");
sw.Close();
Console.WriteLine("追加文件成功！");
}

Answer 2

mydate是你读出的结果，也就是this is test，但是你对这个字符串进行了获得Char的操作，所以得到的是char型数据

Answer 3

Response.Write(new string(mychar));
//作为字符数组是不能够字节写出的

或则干脆这样
MyFileStream = new FileStream("sometext.txt", FileMode.Open);
FileSize = MyFileStream.Length;

byte[] Buffer = new byte[(int)FileSize];
MyFileStream.Read(Buffer, 0, (int)FileSize);
MyFileStream.Close();

//Response.Write("<b>File Contents: </b>");
Response.BinaryWrite(Buffer);

Answer 4

你读出的文件进行了二进制数组的操作
所以结果不是this is test