Содержание

1 Assign DateTime value to asp:Label (C#)
2 Calculates the number of days until a given date
3 DateTime and TimeSpan
4 DateTime.Now.ToShortDateString()
5 Hello World

Assign DateTime value to asp:Label (C#)

   <source lang="csharp">

<%@Page Language="C#" %> <script runat="server">

  void Page_Load(Object Sender, EventArgs e) {
     DateTime Now = DateTime.Now;
     int intHour = Now.Hour;
     Label1.Text = "The time is now " + Now.ToString("T") + "";
     if (intHour < 12) {
        Label1.Text +="Good morning!";
     } else if (intHour > 12 & intHour < 18) {
        Label1.Text +="Good afternoon!";
     } else {
        Label1.Text +="Good evening!";
     }
  }

</script> <html><body>

  <form runat="server">
     <asp:Label id="Label1" runat="server"/>
  </form>

</body></html></source>

Calculates the number of days until a given date

   <source lang="csharp">

File: DaysUntilDates.asmx

<%@ WebService Language="C#" CodeBehind="~/App_Code/DaysUntilDates.cs" Class="DaysUntilDates" %> File: \App_Code\DaysUntilDates.cs using System; using System.Web; using System.Collections; using System.Web.Services; using System.Web.Services.Protocols;

[WebService(Namespace = "http://tempuri.ru/", Description="Calculates the number of days until a given date.")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] public class DaysUntilDates : System.Web.Services.WebService {

   [WebMethod]
   public int DaysUntil(DateTime date)
   {
       return DaysUntilDate(date.Month, date.Day);
   }
   [WebMethod]
   public int DaysUntilHalloween()
   {
       return DaysUntilDate(10, 31);
   }
   [WebMethod]
   public int DaysUntilChristmas()
   {
       return DaysUntilDate(12, 25);
   }
   private int DaysUntilDate(int month, int day)
   {
       DateTime targetDate;
       targetDate = DateTime.Parse(month.ToString() + "/"
                  + day.ToString() + "/"
                  + DateTime.Today.Year);
       if (DateTime.Today > targetDate)
       {
           targetDate = targetDate.AddYears(1);
       }
       TimeSpan timeUntil = targetDate - DateTime.Today;
       return timeUntil.Days;
   }

}</source>

DateTime and TimeSpan

   <source lang="csharp">

<%@ Page %> <script language="C#" runat="server"> private void Page_Load(object sender, System.EventArgs e) {

 DateTime startTime, endTime;
 string output = "";
 TimeSpan span;
 
 startTime=DateTime.Now;
 for (int i=1;i<10000;i++)
 {
   output += i.ToString() + " ";
 }
 endTime=DateTime.Now;
 span=new TimeSpan(endTime.Ticks-startTime.Ticks);

Response.Write("

Time Using Concatenation: " + span.TotalSeconds.ToString() + "

");

 startTime=DateTime.Now;
 System.Text.StringBuilder sb = new System.Text.StringBuilder(10000);
 for (int i=1;i<10000;i++)
 {
   sb.Append(i.ToString());
   sb.Append(" ");
 }
 endTime=DateTime.Now;
 span=new TimeSpan(endTime.Ticks-startTime.Ticks);

Response.Write("

Time Using StringBuilder: " + span.TotalSeconds.ToString() + "

");

} </script></source>

DateTime.Now.ToShortDateString()

   <source lang="csharp">

<%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server">

  protected void Page_Load(object sender, EventArgs e)
  {
     labDate.Text = DateTime.Now.ToShortDateString();
  }

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">

   <title>Hello World Inline</title>

</head> <body>

   <form id="form1" runat="server">

Hello World

   The date is <asp:Label ID="labDate" runat="server"></asp:Label>
   </form>

</body> </html></source>

Format DateTime

   <source lang="csharp">

<%@ Page %> <script language="C#" runat="server">

 private void Page_Load(object sender, System.EventArgs e)
 {
   Label1.Text=DateTime.Now.ToString("hh:mm:ss");
   System.Threading.Thread.Sleep(5000);
   Label2.Text=DateTime.Now.ToString("hh:mm:ss");
 }

</script> <html>

 <body>
   <form id="form1" method="post" runat="server">
     <asp:Label ID="Label1" Runat="server" />

     <asp:Label ID="Label2" Runat="server" />
   </form>
 </body>

</html></source>

Format DateTime variable (C#)

   <source lang="csharp">

<%@ Page %> <script language="C#" runat="server"> private void Page_Load(object sender, System.EventArgs e) {

 Response.Write("Default: " + System.DateTime.Now + "
");
 Response.Write("Local Time: " + System.DateTime.Now.ToLocalTime() + "
");
 Response.Write("Long Date: " + System.DateTime.Now.ToLongDateString() + "
");
 Response.Write("Long Time: " + System.DateTime.Now.ToLongTimeString() + "
");
 Response.Write("Short Date: " + System.DateTime.Now.ToShortDateString() + "
");
 Response.Write("Short Time: " + System.DateTime.Now.ToShortTimeString() + "
");
 Response.Write("ToString Default: " + System.DateTime.Now.ToString() + "
");
 Response.Write("Universal Time: " + System.DateTime.Now.ToUniversalTime() + "
"); // returns a datetime, which can still be formatted
 
 Response.Write("d - Short Date: " + System.DateTime.Now.ToString("d") + "
");
 Response.Write("D - Long Date: " + System.DateTime.Now.ToString("D") + "
");
 Response.Write("t - Short Time: " + System.DateTime.Now.ToString("t") + "
");
 Response.Write("T - Long Time: " + System.DateTime.Now.ToString("T") + "
");
 Response.Write("f - Full date/time (short time): " + System.DateTime.Now.ToString("f") + "
");
 Response.Write("F - Full date/time (long time): " + System.DateTime.Now.ToString("F") + "
");
 Response.Write("g - General: " + System.DateTime.Now.ToString("g") + "
");
 Response.Write("G - General: " + System.DateTime.Now.ToString("G") + "
");
 Response.Write("M/m - Month day: " + System.DateTime.Now.ToString("M") + "
");
 Response.Write("u - Universal Sortable: " + System.DateTime.Now.ToString("u") + "
");
 Response.Write("Y/y - Year month: " + System.DateTime.Now.ToString("y") + "
");
 Response.Write("d, day of month: " + System.DateTime.Now.ToString(" d") + "
"); // can"t use just "d"
 Response.Write("dd, zero-padded day of month: " + System.DateTime.Now.ToString("dd") + "
");
 Response.Write("ddd, abbreviated day of week: " + System.DateTime.Now.ToString("ddd") + "
");
 Response.Write("dddd, full day of week: " + System.DateTime.Now.ToString("dddd") + "
");
 Response.Write("h, hour: " + System.DateTime.Now.ToString(" h") + "
"); // can"t use just "h"
 Response.Write("hh, hour, zero padded " + System.DateTime.Now.ToString("hh") + "
");
 Response.Write("H, hour, 24-hr " + System.DateTime.Now.ToString(" H") + "
"); // can"t use just "H"
 Response.Write("H, hour, 24-hr, zero padded " + System.DateTime.Now.ToString("HH") + "
");
 
 Response.Write("m, minute: " + System.DateTime.Now.ToString(" m") + "
"); // can"t use just "m"
 Response.Write("M, month: " + System.DateTime.Now.ToString(" M") + "
"); // can"t use just "M"
 Response.Write("MM, month, zero padded: " + System.DateTime.Now.ToString("MM") + "
"); 
 Response.Write("MMM, month abbreviated: " + System.DateTime.Now.ToString("MMM") + "
"); 
 Response.Write("MMMM, month full name: " + System.DateTime.Now.ToString("MMMM") + "
"); 
 
 Response.Write("y, year (omits century): " + System.DateTime.Now.ToString(" y") + "
"); // can"t use just "y"
 Response.Write("yy, 2-digit year, zero padded: " + System.DateTime.Now.ToString("yy") + "
"); 
 Response.Write("yyyy, 4-digit year, zero padded: " + System.DateTime.Now.ToString("yyyy") + "
");

} </script></source>

Format DateTime variable (VB)

   <source lang="csharp">

<%@ Page %> <script Language="vb" runat="server"> Private Sub Page_Load(sender As Object, e As System.EventArgs)

 Response.Write("Default: " & System.DateTime.Now & "
")
 Response.Write("Local Time: " & System.DateTime.Now.ToLocalTime() & "
")
 Response.Write("Long Date: " & System.DateTime.Now.ToLongDateString() & "
")
 Response.Write("Long Time: " & System.DateTime.Now.ToLongTimeString() & "
")
 Response.Write("Short Date: " & System.DateTime.Now.ToShortDateString() & "
")
 Response.Write("Short Time: " & System.DateTime.Now.ToShortTimeString() & "
")
 Response.Write("ToString Default: " & System.DateTime.Now.ToString() & "
")
 Response.Write("Universal Time: " & System.DateTime.Now.ToUniversalTime() & "
") " returns a datetime, which can still be formatted
 
 " Using Format Strings
 Response.Write("d - Short Date: " & System.DateTime.Now.ToString("d") & "
")
 Response.Write("D - Long Date: " & System.DateTime.Now.ToString("D") & "
")
 Response.Write("t - Short Time: " & System.DateTime.Now.ToString("t") & "
")
 Response.Write("T - Long Time: " & System.DateTime.Now.ToString("T") & "
")
 Response.Write("f - Full date/time (short time): " & System.DateTime.Now.ToString("f") & "
")
 Response.Write("F - Full date/time (long time): " & System.DateTime.Now.ToString("F") & "
")
 Response.Write("g - General: " & System.DateTime.Now.ToString("g") & "
")
 Response.Write("G - General: " & System.DateTime.Now.ToString("G") & "
")
 Response.Write("M/m - Month day: " & System.DateTime.Now.ToString("M") & "
")
 Response.Write("u - Universal Sortable: " & System.DateTime.Now.ToString("u") & "
")
 Response.Write("Y/y - Year month: " & System.DateTime.Now.ToString("y") & "
")
 " Custom Format Strings
 Response.Write("d, day of month: " & System.DateTime.Now.ToString(" d") & "
") " can"t use just "d"
 Response.Write("dd, zero-padded day of month: " & System.DateTime.Now.ToString("dd") & "
")
 Response.Write("ddd, abbreviated day of week: " & System.DateTime.Now.ToString("ddd") & "
")
 Response.Write("dddd, full day of week: " & System.DateTime.Now.ToString("dddd") & "
")
 Response.Write("h, hour: " & System.DateTime.Now.ToString(" h") & "
") " can"t use just "h"
 Response.Write("hh, hour, zero padded " & System.DateTime.Now.ToString("hh") & "
")
 Response.Write("H, hour, 24-hr " & System.DateTime.Now.ToString(" H") & "
") " can"t use just "H"
 Response.Write("H, hour, 24-hr, zero padded " & System.DateTime.Now.ToString("HH") & "
")
 
 Response.Write("m, minute: " & System.DateTime.Now.ToString(" m") & "
") " can"t use just "m"
 Response.Write("M, month: " & System.DateTime.Now.ToString(" M") & "
") " can"t use just "M"
 Response.Write("MM, month, zero padded: " & System.DateTime.Now.ToString("MM") & "
") 
 Response.Write("MMM, month abbreviated: " & System.DateTime.Now.ToString("MMM") & "
") 
 Response.Write("MMMM, month full name: " & System.DateTime.Now.ToString("MMMM") & "
") 
 
 Response.Write("y, year (omits century): " & System.DateTime.Now.ToString(" y") & "
") " can"t use just "y"
 Response.Write("yy, 2-digit year, zero padded: " & System.DateTime.Now.ToString("yy") & "
") 
 Response.Write("yyyy, 4-digit year, zero padded: " & System.DateTime.Now.ToString("yyyy") & "
")

End Sub "Page_Load </script></source>

Set the asp:Label in code behind based on current time (VB.net)

   <source lang="csharp">

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="MyPage" %> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">

   <title>Untitled Page</title>

</head> <body>

   <form id="form1" runat="server">

<asp:Label ID="lblMessage" runat="server"></asp:Label>

   </form>

</body> </html>

File: Default.aspx.vb

Partial Class MyPage

   Inherits System.Web.UI.Page
   Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
       If DateTime.Now.Hour >= 6 And DateTime.Now.Hour < 12 Then
           lblMessage.Text = "Good morning."
       End If
       If DateTime.Now.Hour >= 12 And DateTime.Now.Hour <= 17 Then
           lblMessage.Text = "Good afternoon."
       End If
       If DateTime.Now.Hour > 17 Or DateTime.Now.Hour < 6 Then
           lblMessage.Text = "Good evening."
       End If
   End Sub

End Class</source>

Today.Ticks

   <source lang="csharp">

<%@ Page %> <script language="vb" runat="server">

 Sub Page_Load(sender As Object, e As EventArgs)
   Dim ticks As Long
   ticks=DateTime.Now.Ticks-DateTime.Today.Ticks
   Dim ts As New TimeSpan(ticks)
   Hours.Text=ts.Hours.ToString()
   Minutes.Text=ts.Minutes.ToString()
   Seconds.Text=ts.Seconds.ToString()
 End Sub

</script> <html>

 <body>
   <form id="form1" method="post" runat="server">
     Since the start of the day
     <asp:Label ID="Hours" Runat="server" />
     hours,
     <asp:Label ID="Minutes" Runat="server" />
     minutes and
     <asp:Label ID="Seconds" Runat="server" />
     seconds have passed.
   </form>
 </body>

</html></source>

ASP.NET Tutorial/Development/DateTime

Содержание

Assign DateTime value to asp:Label (C#)

Calculates the number of days until a given date

DateTime and TimeSpan

DateTime.Now.ToShortDateString()

Hello World

Format DateTime

Format DateTime variable (C#)

Format DateTime variable (VB)

Set the asp:Label in code behind based on current time (VB.net)

Today.Ticks

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