用C#读取文件的不同方法
在这里，我们正在读取两个不同的文件-
读取文本文件-
示例
using System;
using System.IO;
namespace FileApplication {
class Program {
static void Main(string[] args) {
try {
using (StreamReader sr = new StreamReader("d:/new.txt")) {
string line;
//读取并显示文件中的行，直到
//到达文件末尾。
while ((line = sr.ReadLine()) != null) {
Console.WriteLine(line);
}
}
} catch (Exception e) {
//让用户知道出了什么问题。
Console.WriteLine("无法读取该文件：");
Console.WriteLine(e.Message);
}
Console.ReadKey();
}
}
}输出结果
无法读取该文件： Could not find a part of the path "/home/cg/root/4281363/d:/new.txt".
读取二进制文件-
示例
using System.IO;
namespace BinaryFileApplication {
class Program {
static void Main(string[] args) {
BinaryWriter bw;
BinaryReader br;
int i = 25;
double d = 3.14157;
bool b = true;
string s = "I am happy";
//创建文件
try {
bw = new BinaryWriter(new FileStream("mydata", FileMode.Create));
} catch (IOException e) {
Console.WriteLine(e.Message + "\n Cannot create file.");
return;
}
//写入文件
try {
bw.Write(i);
bw.Write(d);
bw.Write(b);
bw.Write(s);
} catch (IOException e) {
Console.WriteLine(e.Message + "\n Cannot write to file.");
return;
}
bw.Close();
//从文件读取
try {
br = new BinaryReader(new FileStream("mydata", FileMode.Open));
} catch (IOException e) {
Console.WriteLine(e.Message + "\n Cannot open file.");
return;
}
try {
i = br.ReadInt32();
Console.WriteLine("Integer data: {0}", i);
d = br.ReadDouble();
Console.WriteLine("Double data: {0}", d);
b = br.ReadBoolean();
Console.WriteLine("Boolean data: {0}", b);
s = br.ReadString();
Console.WriteLine("String data: {0}", s);
} catch (IOException e) {
Console.WriteLine(e.Message + "\n Cannot read from file.");
return;
}
br.Close();
Console.ReadKey();
}
}
}