C# c # | date picker 类

c # | date picker 类

原文:https://www.geeksforgeeks.org/c-sharp-datetimepicker-class/

在 Windows 窗体中，DateTimePicker 控件用于选择和显示窗体中特定格式的日期/时间。FlowLayoutPanel 类用于表示窗口日期选择器控件，还提供不同类型的属性、方法和事件。在系统下定义。Windows.Forms 命名空间。您可以创建两种不同类型的日期选择器，一种是用文本表示日期的下拉列表，另一种是单击给定列表旁边的向下箭头时出现的日历。在 C# 中，您可以使用两种不同的方法在 windows 窗体中创建日期时间选择器:

1。设计时:创建日期时间选择器控件是最简单的方法，如以下步骤所示:

Step 1: Create a windows form as shown in the below image: Visual Studio -> File -> New -> Project -> WindowsFormApp
Step 2: Next, drag and drop the DateTimePicker control from the toolbox to the form as shown in the below image:
Step 3: After drag and drop you will go to the properties of the DateTimePicker to modify DateTimePicker according to your requirement.

输出:

2。运行时:比上面的方法稍微复杂一点。在此方法中，您可以借助 DateTimePicker 类提供的语法，以编程方式创建一个 DateTimePicker。以下步骤显示了如何动态设置创建日期时间选择器:

步骤 1: 使用 DateTimePicker() 构造函数创建一个 DateTimePicker，该构造函数由 DateTimePicker 类提供。

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

```
步骤 2: 创建日期时间选择器后，设置由日期时间选择器类提供的日期时间选择器的属性。

```cs // 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;

```
Step 3: And last add this DateTimePicker control to the form and also add other controls on the DateTimePicker using the following statements:

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

```

示例:

```cs 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:

构造器

| 构造器 | 描述 | | DateTimePicker() | 此构造函数用于初始化 DateTimePicker 类的新实例。 |

菲尔茨

性能

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