C#常用自定义函数小结

本文实例总结了几个c#常用的自定义函数，非常实用。分享给大家供大家参考。具体如下：

1.将数组转成字符串

/// <summary>
/// 将数组转成字符串
/// </summary>
/// <param name="glue">分隔符</param>
/// <param name="pieces">要字符串数组</param>
private string implode(char glue,string[] pieces) 
{
  string result = string.empty;
  int count = pieces.length;
  for (int i = 0; i < count;i++ )
  {
    if(i==0){
      result = pieces[i];
    }else{
      result = result + glue.tostring() + pieces[i];
    }        
  }      
  return result;    
}

2.datetime时间格式转换为unix时间戳格式

/// <summary>
/// datetime时间格式转换为unix时间戳格式
/// </summary>
/// <param name=”time”></param>
/// <returns></returns>
private int convertdatetimeint(system.datetime time)
{
  system.datetime starttime = timezone.currenttimezone.tolocaltime(new system.datetime(1970, 1, 1));
  return (int)(time - starttime).totalseconds;
}

3.生成某个范围内的随机数

/// <summary>
/// 获得某个范围内的随机数
/// </summary>
/// <param name="start">随机数的下界</param>
/// <param name="end">随机数的上界</param>
/// <returns>[minvalue, maxvalue)范围内的随机整数</returns>
private int getrandomint(int minvalue, int maxvalue)
{
  random r = new random(chaos_getrandomseed());
  return r.next(minvalue, maxvalue);
}

/// <summary>
/// 加密随机数生成器，生成随机种子
/// </summary>
/// <returns></returns>
private static int chaos_getrandomseed()
{
  byte[] bytes = new byte[4];
  system.security.cryptography.rngcryptoserviceprovider rng = new system.security.cryptography.rngcryptoserviceprovider();
  rng.getbytes(bytes);
  return bitconverter.toint32(bytes, 0);
}

希望本文所述对大家的c#程序设计有所帮助