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, , 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, , bs.Length);

                result = Encoding.Default.GetString(bs);

                fs.Close();

            }

            catch (Exception)

            {

                return string.Empty;

            }

            return result;

        }

    }

}