c# 文本的读取和写入

文本读取

//文本第一行第一个默认有个字符集，读取来是乱码  保留带有BOM的UTF-8就ok了
public static string ReadTxt(string filename)
{
            try
            {
                //string sTime = DateTime.Now.ToString("yyyyMMdd");
                //string str = logPath + "log" + sTime + ".txt";
                string str = logPath + filename;
                StreamReader sr = new StreamReader(str, Encoding.UTF8);
                String line; String st = "";
                while ((line = sr.ReadLine()) != null)
                {
                    st += line.ToString() + "
";
                }
                sr.Close();
                return st;
            }
            catch (IOException e)
            {
                return "暂无数据";
            }
}

文本写入

/// 

/// 创建文本并传值写入文档
/// 
/// 值
/// 类型
/// 操作状态
public static void WriteFileLog(string log, string logClass)
{
            string sTime = DateTime.Now.ToString("yyyyMMdd");
            try
            {
                //System.AppDomain.CurrentDomain.BaseDirectory +
                string str = logPath;
                DirectoryInfo TheFolder = new DirectoryInfo(str);
                if (TheFolder.Exists)
                {
                }
                else
                {
                    Directory.CreateDirectory(str);
                }

                using (FileStream fs = new FileStream(@str + logClass + sTime + ".txt", FileMode.Append, FileAccess.Write, FileShare.Delete | FileShare.ReadWrite))
                {
                    //获得字节数组 

                    //byte[] data = new UTF8Encoding().GetBytes(recdPtr.m_userid + "--" + DateTime.Now.ToString() + "---注册" + "
");
                    byte[] data = Encoding.UTF8.GetBytes("" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "" + log + "" + Environment.NewLine);
                    //开始写入
                    fs.Write(data, 0, data.Length);

                    //清空缓冲区、关闭流
                    fs.Flush();
                    fs.Close();

                }
            }
            catch
            {

            }
}