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MonthCalendar.DateChanged-Ereignis

Aktualisiert: November 2007

Tritt ein, wenn sich das im MonthCalendar ausgewählte Datum ändert.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public event DateRangeEventHandler DateChanged
/** @event */
public void add_DateChanged (DateRangeEventHandler value)
/** @event */
public void remove_DateChanged (DateRangeEventHandler value)

JScript unterstützt keine Ereignisse.

Das DateChanged-Ereignis tritt ein, wenn ein Datum ausgewählt wird, wobei die Auswahl per Maus, Tastatur oder Code erfolgen kann. Das DateSelected-Ereignis ist ähnlich, es tritt allerdings nur am Ende einer Datumsauswahl mit der Maus ein.

Weitere Informationen über die Behandlung von Ereignissen finden Sie unter Behandeln von Ereignissen.

Im folgenden Codebeispiel wird ein SelectionRange erstellt, und dessen Start-Eigenschaft und End-Eigenschaft werden festgelegt. Außerdem wird der SelectionRange-Eigenschaft des MonthCalendar-Steuerelements der SelectionRange zugewiesen. Wenn das DateChanged-Ereignis ausgelöst wird, werden der Start-Eigenschaftenwert und der End-Eigenschaftenwert in den Textfeldern angezeigt. Für dieses Beispiel ist es erforderlich, dass ein Form mit zwei TextBox-Steuerelementen, einem Button und einem MonthCalendar-Steuerelement vorhanden ist.

private void button1_Click(object sender, System.EventArgs e)
{
   // Create a SelectionRange object and set its Start and End properties.
   SelectionRange sr = new SelectionRange();
   sr.Start = DateTime.Parse(this.textBox1.Text);
   sr.End = DateTime.Parse(this.textBox2.Text);
   /* Assign the SelectionRange object to the 
      SelectionRange property of the MonthCalendar control. */
   this.monthCalendar1.SelectionRange = sr;
}

private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e)
{
   /* Display the Start and End property values of 
      the SelectionRange object in the text boxes. */
   this.textBox1.Text = 
     monthCalendar1.SelectionRange.Start.Date.ToShortDateString();
   this.textBox2.Text = 
     monthCalendar1.SelectionRange.End.Date.ToShortDateString();
}


private void button1_Click(Object sender, System.EventArgs e)
{
    // Create a SelectionRange object and set its Start and End properties.
    SelectionRange sr = new SelectionRange();
    sr.set_Start(DateTime.Parse(this.textBox1.get_Text()));
    sr.set_End(DateTime.Parse(this.textBox2.get_Text()));

    /* Assign the SelectionRange object to the 
       SelectionRange property of the MonthCalendar control. */
    this.monthCalendar1.set_SelectionRange(sr);
} //button1_Click

private void monthCalendar1_DateChanged(Object sender, DateRangeEventArgs e)
{
    /* Display the Start and End property values of 
       the SelectionRange object in the text boxes. */
    this.textBox1.set_Text(monthCalendar1.get_SelectionRange().get_Start().
        get_Date().ToShortDateString());
    this.textBox2.set_Text(monthCalendar1.get_SelectionRange().get_End().
        get_Date().ToShortDateString());
} //monthCalendar1_DateChanged


Im folgenden Codebeispiel wird ein Formular angezeigt, das ein MonthCalendar-Steuerelement enthält, in dem ein Kalenderjahr angezeigt wird. Im Beispiel wird das Festlegen der BackColor-Eigenschaft, der ForeColor-Eigenschaft, der TitleBackColor-Eigenschaft, der TitleForeColor-Eigenschaft, der CalendarDimensions-Eigenschaft und der TrailingForeColor-Eigenschaft veranschaulicht, um das Aussehen des Kalendersteuerelements anzupassen. Andere Eigenschaften, z. B. AnnuallyBoldedDates, BoldedDates und MonthlyBoldedDates, werden so festgelegt, dass durch sie benutzerdefiniert bestimmt wird, welche Datumsangaben fett formatiert werden. Außerdem werden in dem Beispiel die FirstDayOfWeek-Eigenschaft, die MaxDate-Eigenschaft, die MinDate-Eigenschaft und die MaxSelectionCount-Eigenschaft zum Ändern des Kalenderformats verwendet. Das DateSelected-Ereignis und das DateChanged-Ereignis werden ebenfalls behandelt, und ihr Status wird im Formular angezeigt.

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


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Unterstützt in: 3.5, 3.0, 2.0, 1.1, 1.0

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Unterstützt in: 3.5, 2.0

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