四种方法把string[]转换为int[]

         static   void  Main( string [] args)
        {
             // 测试字符串
            StringBuilder test;
             string [] str;
             for  ( int  j  =   0 ; j  <   6 ; j ++ )
            {
                test  =   new  StringBuilder();
                 for  ( int  i  =   1 ; i  <=  ( int )Math.Pow( 10 ,j + 1 ); i ++ )
                {
                    test.Append(i  +   " , " );
                }
                test.Append( " 1 " );
                Console.WriteLine( " 元素个数为 " + ( int )Math.Pow( 10 , j  +   1 ) + " : " );

                str  =  test.ToString().Split( ' , ' );
                StringToInt(str);
                StringToIntByLinq(str);
                StringToIntByArr(str);
                StringToIntByList(str);
                Console.WriteLine();
            }

            Console.Read();
        }

         // 最简单的，用循环
         public   static   void  StringToInt( string [] str)
        {
             long  t1  =  DateTime.Now.Ticks;
             int [] intArr  =   new   int [str.Length];
             for  ( int  i  =   0 ; i  <  str.Length;i ++  )
            {
                intArr[i]  = Convert.ToInt32(str[i]);
            }
            Console.WriteLine( " Loop Cost Time: "   +  (DateTime.Now.Ticks  -  t1));
        }

         // 用Linq
         public   static   void  StringToIntByLinq( string [] str)
        {
             long  t1  =  DateTime.Now.Ticks;
             int [] intArr  =  str.Select(o  =>  Convert.ToInt32(o)).ToArray < int > ();
            Console.WriteLine( " Linq Cost Time: "   +  (DateTime.Now.Ticks  -  t1));
        }

         // 用.NET中的数组转换方法
         public   static   void  StringToIntByArr( string [] str)
        {
             long  t1  =  DateTime.Now.Ticks;
             int [] intArr  =  Array.ConvertAll < string ,  int > (str, Convert.ToInt32);
            Console.WriteLine( " Arr  Cost Time: "   +  (DateTime.Now.Ticks  -  t1));
        }

         // 用泛型
         public   static   void  StringToIntByList( string [] str)
        {
             long  t1  =  DateTime.Now.Ticks;
             int [] intList  =  str.ToList < string > ().ConvertAll < int > (Convert.ToInt32).ToArray < int > ();
            Console.WriteLine( " List Cost Time: "   +  (DateTime.Now.Ticks  -  t1));
        }