C# 如何在 C#中设置 FlowLayoutPanel 的可见性？

如何在 C# 中设置 FlowLayoutPanel 的可见性？

原文:https://www . geeksforgeeks . org/如何设置 c-sharp 中的 flowlayoutpanel 的可见性/

在 Windows 窗体中，FlowLayoutPanel 控件用于在水平或垂直流动方向上排列其子控件。或者换句话说，FlowLayoutPanel 是一个容器，用于在其中水平或垂直组织不同或相同类型的控件。在 FlowLayoutPanel 控件中，可以使用可见属性设置控件及其子控件在表单中的可见性。如果该属性的值设置为真，那么屏幕上会显示 FlowLayoutPanel 控件。如果该属性的值设置为 false，则 FlowLayoutPanel 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 FlowLayoutPanel 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 -> WindowsFormApp
Step 2: Next, drag and drop the FlowLayoutPanel 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 FlowLayoutPanel and set the visibility of the FlowLayoutPanel.

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 FlowLayoutPanel 控件及其子控件的可见性:

public bool Visible { get; set; }

该属性的值为系统。布尔类型，非真即假。此属性的默认值为 false。以下步骤展示了如何动态设置 FlowLayoutPanel 的可见性:

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

```cs // Creating a FlowLayoutPanel FlowLayoutPanel f = new FlowLayoutPanel();

```
步骤 2: 创建完 FlowLayoutPanel 后，设置 FlowLayoutPanel 类提供的 FlowLayoutPanel 的 Visible 属性。

```cs // Setting the visibility f.Visible = true;

```
第 3 步:最后将此 FlowLayoutPanel 控件添加到表单中，并使用以下语句在 FlowLayoutPanel 中添加子控件:

```cs // Adding a FlowLayoutPanel // control to the form this.Controls.Add(f);

and

// Adding child controls to // the FlowLayoutPanel f.Controls.Add(r1);

```

示例:

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 WindowsFormsApp50 {

public partial class Form1 : Form {

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

        // Creating and setting the
        // properties of FlowLayoutPanel
        FlowLayoutPanel f = new FlowLayoutPanel();
        f.Location = new Point(380, 124);
        f.Size = new Size(216, 57);
        f.Name = "Mycontainer";
        f.Font = new Font("Calibri", 12);
        f.FlowDirection = FlowDirection.RightToLeft;
        f.BorderStyle = BorderStyle.Fixed3D;
        f.ForeColor = Color.BlueViolet;
        f.Visible = true;

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

        // Creating and setting the 
        // properties of radio buttons
        RadioButton r1 = new RadioButton();
        r1.Location = new Point(3, 3);
        r1.Size = new Size(95, 20);
        r1.Text = "R1";

        // Adding this control 
        // to the FlowLayoutPanel
        f.Controls.Add(r1);

        RadioButton r2 = new RadioButton();
        r2.Location = new Point(94, 3);
        r2.Size = new Size(95, 20);
        r2.Text = "R2";

        // Adding this control to 
        // the FlowLayoutPanel
        f.Controls.Add(r2);

        RadioButton r3 = new RadioButton();
        r3.Location = new Point(3, 26);
        r3.Size = new Size(95, 20);
        r3.Text = "R3";

        // Adding this control to 
        // the FlowLayoutPanel
        f.Controls.Add(r3);
    }
}
}

输出: