asp.net c写文件函数实例代码

asp教程.net c写文件函数实例代码
streamwriter 和 streamreader 向流写入字符并从流读取字符。下面的代码示例打开 log.txt 文件（如果文件不存在则创建文件）以进行输入，并将信息附加到文件尾。然后将文件的内容写入标准输出，以便显示出来。

[c#]
using system;
using system.io;
class dirappend
{
public static void main(string[] args)
{
streamwriter w = file.appendtext("log.txt");
log ("test1", w);
log ("test2", w);
// close the writer and underlying file.
w.close();
// open and read the file.
streamreader r = file.opentext("log.txt");
dumplog (r);
}

public static void log (string logmessage, textwriter w)
{
w.write("rnlog entry : ");
w.writeline("{0} {1}", datetime.now.tolongtimestring(),
datetime.now.tolongdatestring());
w.writeline(" :");
w.writeline(" :{0}", logmessage);
w.writeline ("-------------------------------");
// update the underlying file.
w.flush();
}

public static void dumplog (streamreader r)
{
// while not at the end of the file, read and write lines.
string line;
while ((line=r.readline())!=null)
{
console.writeline(line);
}
r.close();
}
}

读取文件二

using (filestream fs = new filestream(file, filemode.open,fileaccess.readwrite))
            {
                xmldocument toxml = new xmldocument();
                toxml.load(fs);
                //do some modification for the xml.
                fs.flush();
                toxml.save(fs);
            }

更多详细内容请查看：http://www.zzzyk.com/net/c/33608.htm

读取文件三

写文件

        public static void writefile(string filepath, string str)
        {
            streamwriter sr;
            if (file.exists(filepath)) //如果文件存在,则创建file.appendtext对象
            {
                sr = file.appendtext(filepath);
             }
            else   //如果文件不存在,则创建file.createtext对象
            {
                sr = file.createtext(filepath);
            }
            sr.writeline(str);
            sr.close();
         }

补充：asp.net教程,C语言