如何逐行读取文本内容？

[jqryga1221]

用StreamReader或是File类？

[zykj_2000]

MSDN中的例子
示例
[Visual Basic, C#, C++] 下面的示例从文件中读取行，一直读到文件尾。
[Visual Basic]
Imports System
Imports System.IO
Imports System.Text

Public Class Test

Public Shared Sub Main()
Dim path As String = "c:\temp\MyTest.txt"

Try
If File.Exists(path) Then
File.Delete(path)
End If

Dim sw As StreamWriter = New StreamWriter(path)
sw.WriteLine("This")
sw.WriteLine("is some text")
sw.WriteLine("to test")
sw.WriteLine("Reading")
sw.Close()

Dim sr As StreamReader = New StreamReader(path)

Do While sr.Peek() >= 0
Console.WriteLine(sr.ReadLine())
Loop
sr.Close()
Catch e As Exception
Console.WriteLine("The process failed: {0}", e.ToString())
End Try
End Sub
End Class
[C#]
using System;
using System.IO;

class Test
{
public static void Main()
{
string path = @"c:\temp\MyTest.txt";
try
{
if (File.Exists(path))
{
File.Delete(path);
}

using (StreamWriter sw = new StreamWriter(path))
{
sw.WriteLine("This");
sw.WriteLine("is some text");
sw.WriteLine("to test");
sw.WriteLine("Reading");
}

using (StreamReader sr = new StreamReader(path))
{
while (sr.Peek() >= 0)
{
Console.WriteLine(sr.ReadLine());
}
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}

[yuezhong]

StreamReader sr=new StreamReader( 路径 ）；
string strLine = sr.ReadLine();
while(strLine!= null)
{
strLine = sr.ReadLine();
｝

[YYKXQ]

StreamReader sr=new StreamReader("文本文件路径\\文件名",System.Text.Encoding.Default);
//调用ReadLine方法一行一行的读
string str=sr.ReadLine();//第一行
string str1=sr.ReadLine();//第二行
...