using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HighWayIot.Winform.Business
{
    public class GeneralUtils
    {
        /// <summary>
        /// 在数组前面加一个空字符串
        /// </summary>
        /// <param name="str"></param>
        public static string[] HeadAddEmptyString(string[] str)
        {
            Array.Resize(ref str, str.Length + 1);
            Array.Copy(str, 0, str, 1, str.Length - 1);
            str[0] = string.Empty;
            return str;
        }

        /// <summary>
        /// 转换string为int?
        /// </summary>
        /// <param name="intValue"></param>
        /// <returns></returns>
        public static int? StringNullOrToInt(string intValue)
        {
            if (string.IsNullOrEmpty(intValue.Trim()))
            {
                return null;
            }
            if (int.TryParse(intValue, out int result))
            {
                return result;
            }
            else
            {
                return null;
            }
        }

        public static string IntEmptyOrToString(int? value)
        {
            if (value == null)
            {
                return string.Empty;
            }
            else
            {
                return value.ToString();
            }
        }
    }
}