using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls;public partial class NET_Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { string Date = "2009-8-20 11:20:24"; string Now = Convert.ToDateTime(Date).AddSeconds(-3).ToString(); Response.Write(Now); } }
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;public partial class NET_Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string Date = "2009-8-20 11:20:24";
string Now = Convert.ToDateTime(Date).AddSeconds(-3).ToString();
Response.Write(Now);
}
}
DateTime dt = DateTime.Now;
Console.WriteLine(dt);
Console.WriteLine(dt.AddSeconds(3));
Convert.ToDateTime("2009-8-20 11:20:24").AddSeconds(-3)
Console.WriteLine(dt);
Console.WriteLine(dt.AddSeconds(-3));
DateTime.Now.AddSeconds(-3)这个不知道行不?
再写个sql的declare @Date datetime
set @Date='2009-8-20 11:20:24'
select convert(varchar(20),dateadd(second,-3,@Date),120)
DateTime nowTime = DateTime.Parse(nowTime).AddSeconds(3);
DateTime dt = DateTime.Now;
Console.WriteLine(dt);
Console.WriteLine(dt.AddSeconds(-3));
DateTime dt = DateTime.Now;
Console.WriteLine(dt);
Console.WriteLine(dt.AddSeconds(-3));正解