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DateRangeEventHandler Delegate

Represents the method that will handle the DateChanged or DateSelected event of a MonthCalendar.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public delegate void DateRangeEventHandler (
	Object sender,
	DateRangeEventArgs e
)
/** @delegate */
public delegate void DateRangeEventHandler (
	Object sender, 
	DateRangeEventArgs e
)
Not applicable.

Parameters

sender

The source of the event.

e

A DateRangeEventArgs that contains the event data.

When you create a DateRangeEventArgs delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see Events and Delegates.

The following example displays a form containing a MonthCalendar control that displays one calendar year. The example demonstrates setting properties like BackColor, ForeColor, TitleBackColor, TitleForeColor, CalendarDimensions, and TrailingForeColor to customize the look of the calendar control. Other properties like AnnuallyBoldedDates, BoldedDates, and MonthlyBoldedDates are set to customize which dates are bolded. The example also sets properties to change the calendar format, including FirstDayOfWeek, MaxDate, MinDate, and MaxSelectionCount. The DateSelected and DateChanged events are also handled and their status displayed on the form.

using System;
using System.Drawing;
using System.Windows.Forms;

public class Form1 : System.Windows.Forms.Form
{
    private System.Windows.Forms.MonthCalendar monthCalendar1;
    private System.Windows.Forms.TextBox textBox1;

    [STAThread]
    static void Main() 
    {
        Application.Run(new Form1());
    }

    public Form1()
    {
        this.textBox1 = new System.Windows.Forms.TextBox();
        this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
        this.textBox1.Location = new System.Drawing.Point(48, 488);
        this.textBox1.Multiline = true;
        this.textBox1.ReadOnly = true;
        this.textBox1.Size = new System.Drawing.Size(824, 32);

        // Create the calendar.
        this.monthCalendar1 = new System.Windows.Forms.MonthCalendar();

        // Set the calendar location.
        this.monthCalendar1.Location = new System.Drawing.Point(47, 16);

        // Change the color.
        this.monthCalendar1.BackColor = System.Drawing.SystemColors.Info;
        this.monthCalendar1.ForeColor = System.Drawing.Color.FromArgb(
                                 ((System.Byte)(192)), ((System.Byte)(0)), ((System.Byte)(192)));
        this.monthCalendar1.TitleBackColor = System.Drawing.Color.Purple;
        this.monthCalendar1.TitleForeColor = System.Drawing.Color.Yellow;
        this.monthCalendar1.TrailingForeColor = System.Drawing.Color.FromArgb(
                                 ((System.Byte)(192)), ((System.Byte)(192)), ((System.Byte)(0)));

        // Add dates to the AnnuallyBoldedDates array.
        this.monthCalendar1.AnnuallyBoldedDates = 
            new System.DateTime[] { new System.DateTime(2002, 4, 20, 0, 0, 0, 0),
                                    new System.DateTime(2002, 4, 28, 0, 0, 0, 0),
                                    new System.DateTime(2002, 5, 5, 0, 0, 0, 0),
                                    new System.DateTime(2002, 7, 4, 0, 0, 0, 0),
                                    new System.DateTime(2002, 12, 15, 0, 0, 0, 0),
                                    new System.DateTime(2002, 12, 18, 0, 0, 0, 0)};

        // Add dates to BoldedDates array.
        this.monthCalendar1.BoldedDates = new System.DateTime[] {new System.DateTime(2002, 9, 26, 0, 0, 0, 0)};

        // Add dates to MonthlyBoldedDates array.
        this.monthCalendar1.MonthlyBoldedDates = 
           new System.DateTime[] {new System.DateTime(2002, 1, 15, 0, 0, 0, 0),
                                  new System.DateTime(2002, 1, 30, 0, 0, 0, 0)};

        // Configure the calendar to display 3 rows by 4 columns of months.
        this.monthCalendar1.CalendarDimensions = new System.Drawing.Size(4, 3);

        // Set week to begin on Monday.
        this.monthCalendar1.FirstDayOfWeek = System.Windows.Forms.Day.Monday;

        // Set the maximum visible date on the calendar to 12/31/2010.
        this.monthCalendar1.MaxDate = new System.DateTime(2010, 12, 31, 0, 0, 0, 0);

        // Set the minimum visible date on calendar to 12/31/2010.
        this.monthCalendar1.MinDate = new System.DateTime(1999, 1, 1, 0, 0, 0, 0);

        // Only allow 21 days to be selected at the same time.
        this.monthCalendar1.MaxSelectionCount = 21;

        // Set the calendar to move one month at a time when navigating using the arrows.
        this.monthCalendar1.ScrollChange = 1;

        // Do not show the "Today" banner.
        this.monthCalendar1.ShowToday = false;

        // Do not circle today's date.
        this.monthCalendar1.ShowTodayCircle = false;
            
        // Show the week numbers to the left of each week.
        this.monthCalendar1.ShowWeekNumbers = true;

        // Add event handlers for the DateSelected and DateChanged events
        this.monthCalendar1.DateSelected += new System.Windows.Forms.DateRangeEventHandler(this.monthCalendar1_DateSelected);
        this.monthCalendar1.DateChanged += new System.Windows.Forms.DateRangeEventHandler(this.monthCalendar1_DateChanged);

        // Set up how the form should be displayed and add the controls to the form.
        this.ClientSize = new System.Drawing.Size(920, 566);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {this.textBox1, this.monthCalendar1});
        this.Text = "Month Calendar Example";
    }

    private void monthCalendar1_DateSelected(object sender, System.Windows.Forms.DateRangeEventArgs e)
    {
        // Show the start and end dates in the text box.
        this.textBox1.Text = "Date Selected: Start = " +
            e.Start.ToShortDateString() + " : End = " + e.End.ToShortDateString();
    }

    private void monthCalendar1_DateChanged(object sender, System.Windows.Forms.DateRangeEventArgs e)
    {
        // Show the start and end dates in the text box.
        this.textBox1.Text = "Date Changed: Start =  " +
            e.Start.ToShortDateString() + " : End = " + e.End.ToShortDateString();
    }
}

import System.*;
import System.Drawing.*;
import System.Windows.Forms.*;

public class Form1 extends System.Windows.Forms.Form
{
    private System.Windows.Forms.MonthCalendar monthCalendar1;
    private System.Windows.Forms.TextBox textBox1;

    /** @attribute STAThread()
     */
    public static void main(String[] args)
    {
        Application.Run(new Form1());
    } //main

    public Form1()
    {
        this.textBox1 = new System.Windows.Forms.TextBox();
        this.textBox1.set_BorderStyle(
            System.Windows.Forms.BorderStyle.FixedSingle);
        this.textBox1.set_Location(new System.Drawing.Point(48, 488));
        this.textBox1.set_Multiline(true);
        this.textBox1.set_ReadOnly(true);
        this.textBox1.set_Size(new System.Drawing.Size(824, 32));
        // Create the calendar.
        this.monthCalendar1 = new System.Windows.Forms.MonthCalendar();
        // Set the calendar location.
        this.monthCalendar1.set_Location(new System.Drawing.Point(47, 16));
        // Change the color.
        this.monthCalendar1.set_BackColor(
            System.Drawing.SystemColors.get_Info());
        this.monthCalendar1.set_ForeColor(
            System.Drawing.Color.FromArgb(192, 0, 192));
        this.monthCalendar1.set_TitleBackColor(System.Drawing.Color.get_Purple());
        this.monthCalendar1.set_TitleForeColor(System.Drawing.Color.get_Yellow());
        this.monthCalendar1.set_TrailingForeColor(
            System.Drawing.Color.FromArgb(192, 192, 0));
        // Add dates to the AnnuallyBoldedDates array.
        this.monthCalendar1.set_AnnuallyBoldedDates(new System.DateTime[] {
            new System.DateTime(2002, 4, 20, 0, 0, 0, 0),
            new System.DateTime(2002, 4, 28, 0, 0, 0, 0),
            new System.DateTime(2002, 5, 5, 0, 0, 0, 0),
            new System.DateTime(2002, 7, 4, 0, 0, 0, 0),
            new System.DateTime(2002, 12, 15, 0, 0, 0, 0),
            new System.DateTime(2002, 12, 18, 0, 0, 0, 0) });
        // Add dates to BoldedDates array.
        this.monthCalendar1.set_BoldedDates(new System.DateTime[] {
            new System.DateTime(2002, 9, 26, 0, 0, 0, 0) });
        // Add dates to MonthlyBoldedDates array.
        this.monthCalendar1.set_MonthlyBoldedDates(new System.DateTime[] {
            new System.DateTime(2002, 1, 15, 0, 0, 0, 0),
            new System.DateTime(2002, 1, 30, 0, 0, 0, 0) });
        // Configure the calendar to display 3 rows by 4 columns of months.
        this.monthCalendar1.set_CalendarDimensions(new System.Drawing.Size(4, 3));
        // Set week to begin on Monday.
        this.monthCalendar1.set_FirstDayOfWeek(System.Windows.Forms.Day.Monday);
        // Set the maximum visible date on the calendar to 12/31/2010.
        this.monthCalendar1.set_MaxDate(
            new System.DateTime(2010, 12, 31, 0, 0, 0, 0));
        // Set the minimum visible date on calendar to 12/31/2010.
        this.monthCalendar1.set_MinDate(
            new System.DateTime(1999, 1, 1, 0, 0, 0, 0));
        // Only allow 21 days to be selected at the same time.
        this.monthCalendar1.set_MaxSelectionCount(21);
        // Set the calendar to move one month at a time when navigating
        // using the arrows.
        this.monthCalendar1.set_ScrollChange(1);
        // Do not show the "Today" banner.
        this.monthCalendar1.set_ShowToday(false);
        // Do not circle today's date.
        this.monthCalendar1.set_ShowTodayCircle(false);
        // Show the week numbers to the left of each week.
        this.monthCalendar1.set_ShowWeekNumbers(true);
        // Add event handlers for the DateSelected and DateChanged events
        this.monthCalendar1.add_DateSelected(
            new System.Windows.Forms.DateRangeEventHandler(
            this.monthCalendar1_DateSelected));
        this.monthCalendar1.add_DateChanged(
            new System.Windows.Forms.DateRangeEventHandler(
            this.monthCalendar1_DateChanged));
        // Set up how the form should be displayed and add the controls to
        // the form.
        this.set_ClientSize(new System.Drawing.Size(920, 566));
        this.get_Controls().AddRange(new System.Windows.Forms.Control[] {
            this.textBox1, this.monthCalendar1 });
        this.set_Text("Month Calendar Example");
    } //Form1

    private void monthCalendar1_DateSelected(Object sender,
        System.Windows.Forms.DateRangeEventArgs e)
    {
        // Show the start and end dates in the text box.
        this.textBox1.set_Text("Date Selected: Start = "
            + e.get_Start().ToShortDateString() + " : End = "
            + e.get_End().ToShortDateString());
    } //monthCalendar1_DateSelected

    private void monthCalendar1_DateChanged(Object sender,
        System.Windows.Forms.DateRangeEventArgs e)
    {
        // Show the start and end dates in the text box.
        this.textBox1.set_Text("Date Changed: Start =  "
            + e.get_Start().ToShortDateString() + " : End = "
            + e.get_End().ToShortDateString());
    } //monthCalendar1_DateChanged
} //Form1

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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