C# string分割转int[] string分割转List

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int[] selects= Array.ConvertAll<string, int>(IDList.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries), s => s.StringToInt32());  //string分割转int[] 
List<int> selects = Array.ConvertAll<string, int>(IDList.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries), s => s.StringToInt32() ).Distinct().ToList();  //string分割转list<int>

StringToInt32()是string的扩展方法

    /// <summary>
    /// 扩展类
    /// </summary>
    public static class Extension
    {
        public static int StringToInt32(this string str)
        {
            int num = -1;
            if (int.TryParse(str, out num))
            {
                return num;
            }
            else
            {
                return -1;
            }           
        }
    }

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