如何在 C# 中设置 DateTimePicker 的可见性?
原文:https://www . geeksforgeeks . org/如何设置 c-sharp 中 datetimepicker 的可见性/
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。在 DateTimePicker 控件中,可以使用可见属性设置该控件的可见性。如果此属性的值设置为真,则屏幕上将显示日期时间选择器控件。如果此属性的值设置为 false,则 DateTimePicker 控件不会显示在屏幕上。此属性的默认值为真。您可以通过两种不同的方式设置此属性:
1。设计时:设置日期时间选择器的可见性是最简单的方法,如以下步骤所示:
-
Step 1: Create a windows form as shown in the below image:
Visual Studio->File->New->Project->window formapp
-
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 and set the visibility of the DateTimePicker as shown in the below image:
输出:
2。运行时:比上面的方法稍微复杂一点。在此方法中,您可以借助给定的语法以编程方式设置 DateTimePicker 控件的可见性:
public bool Visible { get; set; }
该属性的值为系统。布尔类型,非真即假。以下步骤显示了如何动态设置日期时间选择器的可见性:
-
步骤 1: 使用 DateTimePicker 类提供的 DateTimePicker()构造函数创建一个 DateTimePicker。
```cs // Creating a DateTimePicker DateTimePicker dt = new DateTimePicker();
```
-
步骤 2: 创建日期选择器后,设置由日期选择器类提供的日期选择器的可见属性。
```cs // Setting the visibility dt.Visible = false;
```
-
Step 3: And last add this DateTimePicker control to the form using the following statement:
```cs // Adding this control to the form this.Controls.Add(dt);
```
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 lab = new Label(); lab.Location = new Point(183, 162); lab.Size = new Size(172, 20); lab.Text = "Select Date and Time"; lab.Font = new Font("Comic Sans MS", 12);
// Adding this control to the form this.Controls.Add(lab);
// Creating and setting the // properties of the DateTimePicker DateTimePicker dt = new DateTimePicker(); dt.Location = new Point(360, 162); dt.Size = new Size(292, 26); dt.MaxDate = new DateTime(2500, 12, 20); dt.MinDate = new DateTime(1753, 1, 1); dt.Format = DateTimePickerFormat.Long; dt.Name = "MyPicker"; dt.Font = new Font("Comic Sans MS", 12); dt.Visible = false; dt.Value = DateTime.Today;
// Adding this // control to the form this.Controls.Add(dt); } } } ```
输出:
在将“可见”属性设置为 false 之前:
将“可见”属性设置为 false 后:
版权属于:月萌API www.moonapi.com,转载请注明出处