C＃| DateTimePicker类

在Windows窗体中，DateTimePicker控件用于选择和显示窗体中具有特定格式的日期/时间。 FlowLayoutPanel类用于表示Windows DateTimePicker控件，还提供不同类型的属性，方法和事件。它在System.Windows.Forms命名空间下定义。您可以创建两种不同类型的DateTimePicker，作为带有以文本表示的日期的下拉列表，或者作为单击给定列表旁边的向下箭头时出现的日历。在C＃中，可以使用两种不同的方法在Windows窗体中创建DateTimePicker：

1.设计时：这是创建DateTimePicker控件的最简单方法，如以下步骤所示：

• 第1步：创建一个Windows窗体，如下图所示：
  Visual Studio->文件->新建->项目-> WindowsFormApp

  

• 步骤2：接下来，将DateTimePicker控件从工具箱拖放到窗体，如下图所示：

  

• 步骤3：拖放之后，您将转到DateTimePicker的属性，以根据需要修改DateTimePicker。

  输出：

  

2.运行时：比上述方法有些棘手。在此方法中，可以借助DateTimePicker类提供的语法以编程方式创建DateTimePicker。以下步骤显示如何动态设置创建DateTimePicker：

• 步骤1：使用DateTimePicker类提供的DateTimePicker()构造函数创建DateTimePicker。

  // Creating a DateTimePicker
  DateTimePicker d = new DateTimePicker();
  

• 步骤2：创建DateTimePicker之后，设置DateTimePicker类提供的DateTimePicker的属性。

  // Setting the location of the DateTimePicker
  d.Location = new Point(360, 162); 
  
  // Setting the size of the DateTimePicker
  d.Size = new Size(292, 26); 
  
  // Setting the maximum date of the DateTimePicker
  d.MaxDate = new DateTime(2500, 12, 20); 
  
  // Setting the minimum date of the DateTimePicker
  d.MinDate = new DateTime(1753, 1, 1); 
  
  // Setting the format of the DateTimePicker
  d.Format = DateTimePickerFormat.Long; 
  
  // Setting the name of the DateTimePicker
  d.Name = "MyPicker"; 
  
  // Setting the font of the DateTimePicker
  d.Font = new Font("Comic Sans MS", 12);
  
  // Setting the visibility of the DateTimePicker 
  d.Visible = true; 
  
  // Setting the value of the DateTimePicker
  d.Value = DateTime.Today; 
  

• 步骤3：最后，将此DateTimePicker控件添加到表单中，并使用以下语句在DateTimePicker上添加其他控件：

  // Adding this control 
  // to the form 
  this.Controls.Add(d); 
  

  例子：

  using System;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System.Data;
  using System.Drawing;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;
  using System.Windows.Forms;
    
  namespace WindowsFormsApp48 {
    
  public partial class Form1 : Form {
    
      public Form1()
      {
          InitializeComponent();
      }
    
      private void Form1_Load(object sender, EventArgs e)
      {
          // Creating and setting the
          // properties of the Label
          Label l = new Label();
          l.Location = new Point(183, 162);
          l.Size = new Size(172, 20);
          l.Text = "Select Date and Time";
          l.Font = new Font("Comic Sans MS", 12);
    
          // Adding this control
          // to the form
          this.Controls.Add(l);
    
          // Creating and setting the
          // properties of the DateTimePicker
          DateTimePicker d = new DateTimePicker();
          d.Location = new Point(360, 162);
          d.Size = new Size(292, 26);
          d.MaxDate = new DateTime(2500, 12, 20);
          d.MinDate = new DateTime(1753, 1, 1);
          d.Format = DateTimePickerFormat.Long;
          d.Name = "MyPicker";
          d.Font = new Font("Comic Sans MS", 12);
          d.Visible = true;
          d.Value = DateTime.Today;
    
          // Adding this control
          // to the form
          this.Controls.Add(d);
      }
  }
  }
  

  输出：

  

建设者

Constructor	Description
DateTimePicker()	This constructor is used to initializes a new instance of the DateTimePicker class.

领域

Fields	Description
DefaultMonthBackColor	This is field specifies the default month background color of the DateTimePicker control. This field is read-only.
DefaultTitleBackColor	This is field specifies the default title back color of the DateTimePicker control. This field is read-only.
DefaultTitleForeColor	This is field specifies the default title foreground color of the DateTimePicker control. This field is read-only.
DefaultTrailingForeColor	This is field specifies the default trailing foreground color of the DateTimePicker control. This field is read-only.
MaxDateTime	This is field specifies the maximum date value of the DateTimePicker control. This field is read-only.
MinDateTime	This is field get the minimum date value of the DateTimePicker control.

特性

Property	Description
AutoSize	This property is used to get or set a value that indicates whether the control resizes based on its contents.
AutoSizeMode	This property indicates the automatic sizing behavior of the control.
BackColor	This property is used to get or set the background color for the control.
BorderStyle	This property indicates the border style for the control.
CalendarFont	This property is used to get or set the font style applied to the calendar.
CalendarForeColor	This property is used to get or set the foreground color of the calendar.
CalendarMonthBackground	This property is used to get or set the background color of the calendar month.
CalendarTitleBackColor	This property is used to get or set the background color of the calendar title.
CalendarTitleForeColor	This property is used to get or set the foreground color of the calendar title.
CalendarTrailingForeColor	This property is used to get or set the foreground color of the calendar trailing dates.
Font	This property is used to get or set the font of the text displayed by the control.
ForeColor	This property is used to get or set the foreground color of the control.
Format	This property is used to get or set the format of the date and time displayed in the control.
Height	This property is used to get or set the height of the control.
Location	This property is used to get or set the coordinates of the upper-left corner of the DateTimePicker control relative to the upper-left corner of its form.
MaxDate	This property is used to get or set the maximum date and time that can be selected in the control.
MaximumDateTime	This property is used to get the maximum date value allowed for the DateTimePicker control.
MinDate	This property is used to get or set the minimum date and time that can be selected in the control.
MinimumDateTime	This property is used to set the minimum date value allowed for the DateTimePicker control.
Name	This property is used to get or set the name of the control.
ShowUpDown	This property is used to get or set a value indicating whether a spin button control (also known as an up-down control) is used to adjust the date/time value.
ShowCheckBox	This property is used to get or set a value indicating whether a check box is displayed to the left of the selected date.
Size	This property is used to get or set the height and width of the control.
Visible	This property is used to get or set a value indicating whether the control and all its child controls are displayed.
Value	This property is used to get or set the date/time value assigned to the control.
Width	This property is used to get or set the width of the control.