appconst.cs

usb-com for sms 自己开发的类 可以借鉴下

using System;

namespace IPP.SMS
{
	/// <summary>
	/// Summary description for AppConst.
	/// </summary>
	public class AppConst
	{

		public AppConst()
		{
		}

		#region 系统中判断未赋值的判断，只可以用于比较判断，不能用于赋值

		public const string StringNull="";
		public const int IntNull=-999;	
		public const decimal DecimalNull=-999;

		public static DateTime DateTimeNull = DateTime.Parse("1900-01-01");

		#endregion
		public const string AllSelectString="--- ALL ---";
		public const string DecimalFormat = "#####0.00";
		public const string DateFormat = "yyyy-MM-dd";
		public const string DateFormatLong = "yyyy-MM-dd hh:mm:ss";

		public const string ConnectionString = "server=10.10.130.20;User ID=sa;Password=.net;database=yourdb";
		
	}
}