请教如何在C#中删除一个文本文件最后一行
请教如何在C#中删除一个文本文件最后一行..呵呵

[解决办法]
参考这个：
http://topic.csdn.net/t/20041207/10/3621707.html
[解决办法]
参考 如下
byte[] buffer1,buffer2;
int iPosition=0;
FileStream fs = new FileStream(@ "C:\test.txt ",FileMode.Open, FileAccess.ReadWrite);
if (fs.Length> =1)
{
buffer1 = new byte[fs.Length];
fs.Seek(0, SeekOrigin.Begin);
fs.Read(buffer1, 0, buffer1.Length);
for (int i = buffer1.Length - 1; i > = 0; i--)
{
if (buffer1[i] == 10)//判断是否换行符
{
iPosition = i;
break;
}
}
buffer2 = new byte[iPosition];
for (int i = 0; i < buffer2.Length-1; i++)
{
buffer2[i] = buffer1[i];
}
fs.Close();
File.Delete(@ "C:\test.txt ");
fs = new FileStream(@ "C:\temp.txt ",FileMode.CreateNew);
fs.Seek(0, SeekOrigin.Begin);
fs.Write(buffer2, 0, buffer2.Length);
fs.Close();
File.Move(@ "C:\temp.txt ", @ "C:\test.txt ");

}
--------------------------------------------
太困了 写的不是很严谨 还有些情况没有写出判断
例如 最末尾是换行符的情况
[解决办法]
其实还是要从第一行访问起，直到最后一行！
[解决办法]
楼上兄弟给的很详细了
[解决办法]
sealed class program{
static void Main(){
string fileName = @ "c:\test.txt ";
string[] allLines = System.IO.File.ReadAllLines(fileName);
System.Array.Resize(ref allLines, allLines.Length - 1);
System.IO.File.WriteAllLines(fileName, allLines);
}
}

// only for .net v2.0
[解决办法]
在C/C++下好像有相应的函数,,
[解决办法]
private void delete()
{
private ArrayList _arrBarcode = new ArrayList();

if (System.IO.File.Exists( "文件 "))
{
System.IO.StreamReader objectReader = new System.IO.StreamReader( "文件 ", System.Text.Encoding.UTF8);
while (sLine != null)
{
sLine = objectReader.ReadLine();
if (sLine != null)
_arrBarcode.Add(sLine);
}

objectReader.Close();
}
}
[解决办法]
private void delete()
{
private ArrayList _arrBarcode = new ArrayList();
private string sLine = " ";
if (System.IO.File.Exists( "文件 "))
{
System.IO.StreamReader objectReader = new System.IO.StreamReader( "文件 ", System.Text.Encoding.UTF8);
while (sLine != null)
{
sLine = objectReader.ReadLine();
if (sLine != null)
_arrBarcode.Add(sLine);
}
objectReader.Close();
}
_arrBarcode.RemoveAt(_arrBarcode.Count - 1);
if (_arrBarcode.Count > 0)
{
System.IO.StreamWriter objectWriter = new System.IO.StreamWriter( "文件, false, System.Text.Encoding.UTF8);
for (int i = 0; i < _arrBarcode.Count; i++)

{
sLine = _arrBarcode[i].ToString() + "\r\n ";
if (sLine.Trim() != " ")
{
objectWriter.Write(sLine);
}
}
objectWriter.Close();
}
}

[解决办法]
如果只是删除最后一行，不需要循环，但是也需要读取，修改，写入这个过程

StreamReader sr = new StreamReader(@ "g:\test.txt ", System.Text.Encoding.Default);
string str = sr.ReadToEnd();
sr.Close();
if (str.LastIndexOf( "\r\n ") > -1)
{
str = str.Remove(str.LastIndexOf( "\r\n "));
//str = str.Remove(str.LastIndexOf( "\r\n "), str.Length - str.LastIndexOf( "\r\n ")); //vs2003用这个
}
else
{
str = " ";
}
StreamWriter sw = new StreamWriter(@ "g:\test.txt ", false, System.Text.Encoding.Default);
sw.Write(str);
sw.Flush();
sw.Close();
[解决办法]
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[解决办法]
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