ASP.NET 文件操作类

1.读取文件

2.写入文件

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace BigData.Common.File
{
    /// <summary>
    /// 文件操作类
    /// </summary>
    public class FileHelper
    {
        /// <summary>
        /// 写入一行数据
        /// </summary>
        /// <param name="path"></param>
        /// <param name="str"></param>
        /// <param name="isAppend"></param>
        /// <returns></returns>
        public static bool WriteLine(string path, string str, bool isAppend = true)
        {
            try
            {
                StreamWriter sw = new StreamWriter(path, isAppend);
                sw.WriteLine(str);
                sw.Flush();
                sw.Close();
            }
            catch (Exception)
            {
                return false;
            }

            return true;
        }

        /// <summary>
        /// 读取文件所有内容
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static string ReadAll(string path)
        {
            string result = string.Empty;
            try
            {
                StreamReader sr = new StreamReader(path);
                result = sr.ReadToEnd();
                sr.Close();
            }
            catch (Exception)
            {
                return string.Empty;
            }

            return result;
        }

        /// <summary>
        /// 写入文本
        /// </summary>
        /// <param name="path"></param>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool WriteToTxt(string path, string str)
        {
            try
            {
                FileStream fs = new FileStream(path, FileMode.Append);
                byte[] bs = Encoding.Default.GetBytes(str);
                fs.Write(bs, 0, bs.Length);
                fs.Flush();
                fs.Close();
            }
            catch (Exception)
            {
                return false;
            }

            return true;
        }

        /// <summary>
        /// 读取文本
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static string ReadTxt(string path)
        {
            string result = string.Empty;
            try
            {
                FileStream fs = new FileStream(path, FileMode.OpenOrCreate);
                byte[] bs = new byte[fs.Length];
                fs.Read(bs, 0, bs.Length);
                result = Encoding.Default.GetString(bs);
                fs.Close();
            }
            catch (Exception)
            {
                return string.Empty;
            }

            return result;
        }
    }
}