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using System;
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using System.IO;
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using System.Text;
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namespace ZJ_BYD.Untils
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{
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public class StrHelper
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{
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///<summary>
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///生成随机字符串
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///</summary>
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///<param name="length">目标字符串的长度</param>
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///<param name="useNum">是否包含数字，1=包含，默认为包含</param>
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///<param name="useLow">是否包含小写字母，1=包含，默认为包含</param>
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///<param name="useUpp">是否包含大写字母，1=包含，默认为包含</param>
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///<param name="useSpe">是否包含特殊字符，1=包含，默认为不包含</param>
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///<param name="custom">要包含的自定义字符，直接输入要包含的字符列表</param>
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///<returns>指定长度的随机字符串</returns>
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public static string GetRandomString(int length, bool useNum, bool useLow, bool useUpp, bool useSpe)
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{
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byte[] b = new byte[4];
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new System.Security.Cryptography.RNGCryptoServiceProvider().GetBytes(b);
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Random r = new Random(BitConverter.ToInt32(b, 0));
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string s = null, str = "";
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if (useNum == true) { str += "0123456789"; }
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if (useLow == true) { str += "abcdefghijklmnopqrstuvwxyz"; }
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if (useUpp == true) { str += "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; }
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if (useSpe == true) { str += "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"; }
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for (int i = 0; i < length; i++)
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{
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s += str.Substring(r.Next(0, str.Length - 1), 1);
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}
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return s;
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}
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/// <summary>
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/// 写入文本文档
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/// </summary>
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/// <param name="s"></param>
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public static bool WriteText(string path, string content)
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{
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try
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{
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FileStream fs = new FileStream(path, FileMode.Create);
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StreamWriter sw = new StreamWriter(fs);
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//开始写入
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sw.Write(content);
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//清空缓冲区
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sw.Flush();
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//关闭流
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sw.Close();
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fs.Close();
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return true;
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}
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catch (Exception ex)
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{
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LogHelper.WriteErrorLog("写入文本文件异常", ex);
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return false;
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}
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}
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/// <summary>
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/// 读取文本文档
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/// </summary>
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/// <returns></returns>
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public static string ReadText(string path)
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{
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var content = "";
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try
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{
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FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
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var sw = new StreamReader(fileStream, Encoding.Default);
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while (!sw.EndOfStream)
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{
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content = sw.ReadLine();
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}
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sw.Close();
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}
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catch (Exception ex)
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{
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LogHelper.WriteErrorLog("读取文本文件异常", ex);
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return null;
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}
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return content;
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}
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}
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}
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