commonhelper 通用类：计时器、数组去重、自动生成日志编号、生成随机数、处理字符串

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;

namespace Infrastructure
{
/// <summary>
/// 常用公共类
/// </summary>
public class CommonHelper
{
#region Stopwatch计时器
/// <summary>
/// 计时器开始
/// </summary>
/// <returns></returns>
public static Stopwatch TimerStart()
{
Stopwatch watch = new Stopwatch();
watch.Reset();
watch.Start();
return watch;
}
/// <summary>
/// 计时器结束
/// </summary>
/// <param name="watch"></param>
/// <returns></returns>
public static string TimerEnd(Stopwatch watch)
{
watch.Stop();
double costtime = watch.ElapsedMilliseconds;
return costtime.ToString();
}
#endregion

#region 删除数组中的重复项
/// <summary>
/// 删除数组中的重复项
/// </summary>
/// <param name="values"></param>
/// <returns></returns>
public static string[] RemoveDup(string[] values)
{
List<string> list = new List<string>();
for (int i = 0; i < values.Length; i++)//遍历数组成员
{
if (!list.Contains(values[i]))
{
list.Add(values[i]);
};
}
return list.ToArray();
}
#endregion

#region 自动生成日期编号
/// <summary>
/// 自动生成编号 201008251145409865
/// </summary>
/// <returns></returns>
public static string CreateNo()
{
Random random = new Random();
string strRandom = random.Next(1000, 10000).ToString(); //生成编号
string code = DateTime.Now.ToString("yyyyMMddHHmmss") + strRandom;//形如
return code;
}
#endregion

#region 生成0-9随机数
/// <summary>
/// 生成0-9随机数
/// </summary>
/// <param name="codeNum">生成长度</param>
/// <returns></returns>
public static string RndNum(int codeNum)
{
StringBuilder sb = new StringBuilder(codeNum);
Random rand = new Random();
for (int i = 1; i < codeNum + 1; i++)
{
int t = rand.Next(9);
sb.AppendFormat("{0}", t);
}
return sb.ToString();

}
#endregion

#region 删除最后一个字符之后的字符
/// <summary>
/// 删除最后结尾的一个逗号
/// </summary>
public static string DelLastComma(string str)
{
return str.Substring(0, str.LastIndexOf(","));
}
/// <summary>
/// 删除最后结尾的指定字符后的字符
/// </summary>
public static string DelLastChar(string str, string strchar)
{
return str.Substring(0, str.LastIndexOf(strchar));
}
/// <summary>
/// 删除最后结尾的长度
/// </summary>
/// <param name="str"></param>
/// <param name="Length"></param>
/// <returns></returns>
public static string DelLastLength(string str, int Length)
{
if (string.IsNullOrEmpty(str))
return "";
str = str.Substring(0, str.Length - Length);
return str;
}
#endregion
}
}