string 转 int 函数

     public decimal DealWithNullValueWithDecimal(string txtBox)
    {
        if (string.IsNullOrEmpty(txtBox.Trim()))
        {
            return 0;
        }
        else
        {
            decimal dec = 0m;
            try {
                dec = Convert.ToDecimal(txtBox.Trim().ToString());
            }
            catch(Exception ex)
            {
                Alert("转换出错");
            }
            finally
            {
              
            }
            return dec;
        }
    }