using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace Utils.Files
{
	public class ReadWriteFile
	{
		/// <summary>
		/// 读取指定文件（路径与文件名）的内容
		/// <para>文件不存在时，返回string.Empty</para>
		/// </summary>
		/// <param name="path">路径与文件名</param>
		/// <returns>文件的内容</returns>
		public static string ReadFile(string path)
		{
			var fileStrings = string.Empty;

			try {
				FileStream fs = new FileStream(path, FileMode.Open);
				StreamReader sr = new StreamReader(fs, Encoding.Default);
				while (true) {
					if (sr.EndOfStream)
						break;
					fileStrings = sr.ReadToEnd();
				}
				sr.Close();
				fs.Close();
			} catch (FileNotFoundException) {
			}

			return fileStrings;
		}

		/// <summary>
		/// 重写指定文件的数据
		/// <para>如果文件不存在则创建一个新的文件。路径必须存在。</para>
		/// </summary>
		/// <param name="path">路径与文件名</param>
		/// <param name="content">文件内容</param>
		public static void WriteFile(string path, string content)
		{
			FileStream fs = new FileStream(path, FileMode.Create);
			StreamWriter sw = new StreamWriter(fs);
			//开始写入
			sw.Write(content);
			//清空缓冲区
			sw.Flush();
			//关闭流
			sw.Close();
			fs.Close();
		}

	}
}