第 6 章 crifanLib.cs之Array

    //given a string array 'origStrArr', get a sub string array from 'startIdx', length is 'len'
    public string[] getSubStrArr(string[] origStrArr, int startIdx, int len)
    {
        string[] subStrArr = new string[] { };
        if ((origStrArr != null) && (origStrArr.Length > 0) && (len > 0))
        {
            List<string> strList = new List<string>();
            int endPos = startIdx + len;
            if (endPos > origStrArr.Length)
            {
                endPos = origStrArr.Length;
            }

            for (int i = startIdx; i < endPos; i++)
            {
                //refer: http://zhidao.baidu.com/question/296384408.html
                strList.Add(origStrArr[i]);
            }

            subStrArr = new string[len];
            strList.CopyTo(subStrArr);
        }

        return subStrArr;
    }

    

string[] fieldExpressions = getSubStrArr(expressions, 1, expressions.Length - 1);