获取导出题号范围

/// <summary>
/// 获取导出题号范围
/// </summary>
/// <param name="strRangeText">导出题号范围表达式，如：0，3，5-9，20</param>
/// <returns>List<int>导出题号范围</returns>
private bool getImportNumber(string strRangeText,out List<int> lineList)
{
    lineList = new List<int>();
    if (strRangeText == null)
    {
        lineList.Clear();
        return false;
    }
    string[] strArr = strRangeText.Split(new char[] { ',', '，' }, StringSplitOptions.RemoveEmptyEntries);
    if (strArr == null)
    {
        lineList.Clear();
        return false;
    }
    for (int i = 0; i < strArr.Length; i++)
    {
        string str = strArr[i];
        if (!str.Trim().Contains('-'))
        {
            try
            {
                int lineNumber = Convert.ToInt32(str.Trim());
                if (lineNumber > -1)
                {
                    lineList.Add(lineNumber);
                }
            }
            catch
            {
                lineList.Clear();
                return false;
            }
        }
        else
        {
            string[] strArr2 = str.Trim().Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries);
            if (strArr2.Length > 1)
            {
                try
                {
                    int intFromPage = Convert.ToInt32(strArr2[0]);
                    int intToPage = Convert.ToInt32(strArr2[strArr2.Length - 1]);
                    for (int page = intFromPage; page <= intToPage; page++)
                    {
                        lineList.Add(page);
                    }
                }
                catch
                {
                    lineList.Clear();
                    return false;
                }
            }
            else
            {
                lineList.Clear();
                return false;
            }
        }
    }
    if (lineList.Count > 0)
    {
        return true;
    }
    else
    {
        return false;
    }
}