Radiobutton c windows forms

Последнее обновление: 31.10.2015

CheckBox

Элемент CheckBox или флажок предназначен для установки одного из двух значений: отмечен или не отмечен. Чтобы отметить флажок, надо установить
у его свойства Checked значение true.

Кроме свойства Checked у элемента CheckBox имеется свойство CheckState, которое позволяет задать для флажка
одно из трех состояний — Checked (отмечен), Indeterminate (флажок не определен — отмечен, но находится в неактивном состоянии) и Unchecked (не отмечен)

Также следует отметить свойство AutoCheck — если оно имеет значение false, то мы не можем изменять состояние флажка.
По умолчанию оно имеет значение true.

При изменении состояния флажка он генерирует событие CheckedChanged. Обрабатывая это событие, мы можем получать измененный флажок
и производить определенные действия:

private void checkBox_CheckedChanged(object sender, EventArgs e)
{
    CheckBox checkBox = (CheckBox)sender; // приводим отправителя к элементу типа CheckBox
    if (checkBox.Checked == true)
    {
        MessageBox.Show("Флажок " + checkBox.Text + "  теперь отмечен");
    }
    else 
    {
        MessageBox.Show("Флажок " + checkBox.Text + "  теперь не отмечен");
    }      
}

Radiobutton

На элемент CheckBox похож элемент RadioButton или переключатель. Переключатели располагаются группами, и включение одного переключателя
означает отключение всех остальных.

Чтобы установить у переключателя включенное состояние, надо присвоить его свойству Checked значение true.

Для создания группы переключателей, из которых можно бы было выбирать, надо поместить несколько переключателей в какой-нибудь контейнер, например,
в элементы GroupBox или Panel. Переключатели. находящиеся в разных контейнерах, будут относиться к разным группам:

Похожим образом мы можем перехватывать переключение переключателей в группе, обрабатывая событие CheckedChanged.
Связав каждый переключатель группы с одним обработчиком данного события, мы сможем получить тот переключатель, который в данный момент выбран:

private void radioButton_CheckedChanged(object sender, EventArgs e)
{
	// приводим отправителя к элементу типа RadioButton
    RadioButton radioButton = (RadioButton)sender;
    if (radioButton.Checked)
    {
        MessageBox.Show("Вы выбрали " + radioButton.Text);
    }        
}

Источник

Last Updated :
20 Mar, 2025

In Windows Forms, RadioButton control is a Graphical User Interface (GUI) used to select a single option among the group of options. For example, select a gender from the given list, so choose only one option among three options like Male or Female or Others. When we select a radio button any previously selected radio will be automatically deselected from the same group.

In Windows Forms, The radio button is part of the System.Windows.Forms namespace. These are the common key features of the radio button:

Ways to Create a Radio Button In Windows Forms

There are mainly two ways to create a radio button in Windows forms which are mentioned below.

Drag and drop ( Design-Time)
Custom Button ( Run-Time)

Drag and drop ( Design-Time)

This is the easiest way to create a radio button in Windows Forms using Visual Studio we just have to open the toolbox and drag and drop the button on the form in the designer and further we can change the appearance of the radio button using the properties. Follow these steps to create a radio button.

Step 1: Now locate the project with the name here we are using the default name which is Form1 and it will open a form in the editor that we can further modify.

In the image, we have two files that are open one Design and there is Form1.cs these two play a major role. We use the Form 1.cs file for the custom logic.

Step 2: Now open a Toolbox go to the view > Toolbox or ctrl + alt + x.

Step 3. Now open the common controls and drag and drop the RadioButton on the form where we want to it be placed.

Step 4. Now open the properties of the button press right-click on the button and it will open the properties solution explorer now we can change the button name to Click here.

Here, we can also add different labels and radio buttons and further change their properties.

Output:

Custom Button (Run Time)

In this method, we are going to modify the Form1.cs file and add custom code modification in C# with the help of the RadioButton class. The following steps show how to create a RadioButton dynamically:

Step 1: Create a radio button using the RadioButton() constructor provided by the RadioButton class.

// Creating radio button

RadioButton r1 = new RadioButton();

Step 2: After creating the RadioButton, set the properties of the RadioButton provided by the RadioButton class.

// Set the AutoSize property

r1.AutoSize = true;

// Add text in RadioButton

r1.Text = «Intern»;

// Set the location of the RadioButton

r1.Location = new Point(286, 40);

// Set Font property

r1.Font = new Font(«Berlin Sans FB», 12);

Step 3: And last add this RadioButton control to the form using Add() method.

// Add this radio button to the form

this.Controls.Add(r1);

Step 4: Now double-click on the button in Design and it will open the Form cs file where code is written in C#. Here the program file is Form 1.cs Now write this code in Form1.cs file

Form1.cs file:



namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

            // Creating and setting label
            Label l = new Label();
            l.AutoSize = true;
            l.Location = new Point(176, 40);
            l.Text = "Select Post:";
            l.Font = new Font("Berlin Sans FB", 12);

            // Adding this label to the form
            this.Controls.Add(l);

            // Creating and setting the 
            // properties of the RadioButton
            RadioButton r1 = new RadioButton();
            r1.AutoSize = true;
            r1.Text = "Intern";
            r1.Location = new Point(286, 40);
            r1.Font = new Font("Berlin Sans FB", 12);

            // Adding this label to the form
            this.Controls.Add(r1);

            // Creating and setting the 
            // properties of the RadioButton
            RadioButton r2 = new RadioButton();
            r2.AutoSize = true;
            r2.Text = "Team Leader";
            r2.Location = new Point(356, 40);
            r2.Font = new Font("Berlin Sans FB", 12);
            // Adding this label to the form
            this.Controls.Add(r2);

            // Creating and setting the 
            // properties of the RadioButton
            RadioButton r3 = new RadioButton();
            r3.AutoSize = true;
            r3.Text = "Software Engineer";
            r3.Location = new Point(480, 40);
            r3.Font = new Font("Berlin Sans FB", 12);

            // Adding this label to the form
            this.Controls.Add(r3);

        }

    }
}

Output:

Properties

Property	Description
Appearance	This property is used to set a value determining the appearance of the RadioButton.
AutoCheck	This property is used to set a value indicating whether the Checked value and the appearance of the RadioButton control automatically change when the RadioButton control is clicked.
AutoSize	This property is used to set a value that indicates whether the RadioButton control resizes based on its contents.
BackColor	This property is used to set the background colour of the RadioButton control.
CheckAlign	This property is used to set the location of the check box portion of the RadioButton.
Checked	This property is used to set a value indicating whether the RadioButton control is checked.
Font	This property is used to set the font of the text displayed by the RadioButton control.
ForeColor	This property is used to set the foreground colour of the RadioButton control.
Location	This property is used to set the coordinates of the upper-left corner of the RadioButton control relative to the upper-left corner of its form.
Name	This property is used to set the name of the RadioButton control.
Padding	This property is used to set padding within the RadioButton control.
Text	This property is used to set the text associated with this RadioButton control.
TextAlign	This property is used to set the alignment of the text on the RadioButton control.
Visible	This property is used to set a value indicating whether the RadioButton control and all its child controls are displayed.

Events

Event	Description
Click	This event occurs when the RadioButton control is clicked.
CheckedChanged	This event occurs when the value of the Checked property changes.
AppearanceChanged	This event occurs when the Appearance property value changes.
DoubleClick	This event occurs when the user double-clicks the RadioButton control.
Leave	This event occurs when the input focus leaves the RadioButton control.
MouseClick	This event occurs when the RadioButton control is clicked by the mouse.
MouseDoubleClick	This event occurs when the user double-clicks the RadioButton control with the mouse.
MouseHover	This event occurs when the mouse pointer rests on the RadioButton control.
MouseLeave	This event occurs when the mouse pointer leaves the RadioButton control.

Источник

Introduction

In this article, I am going to explain how to work with Radio Button Control in Windows Forms Applications using Visual Studio 2017. Radio Button allows a Distinct Selection of Several items. In each group of radio buttons, only one can be checked or Selected. Conceptually, this control implements an Exclusive Selection.CheckBoxes allow Multiple selections at once.

RadioButton Control

The RadioButton Provides a User Interface for an Exclusive Selection.RadioButton or option Buttons enable the user to select a single option from a group of choices when Paired with other Radio Buttons. When a user clicks on the Radio Button, it Becomes Checked and all other radio Buttons with the Same group become Unchecked.

Step 1. Start the Project

Let’s get Started, Open Visual Studio 2017—>start new project —->Windows Forms Application and name it RadioButton Control.

Step 2. Drag and Drop Control

By default, the Designer Page will be loaded now Drag and Drop the Radio Button control and Button from the Toolbox into the Form Application in Visual Studio 2017. Change the Text of the Radio Button to Red, Blue, and Green.

Step 3. Coding For Button Click Event

Follow the code given below in the screenshot. When one option is chosen from the group of options of Radio Buttons and then the Button is clicked, the Selected option will be displayed in the Message Box.

Step 4. Compile and Run-Sample output

Compile and Run the code the Following Output will be obtained as given below in the Screenshot.

Step 5. GroupBox Control

You can Add GroupBox Control or Panel control to the Form. In this Control, you can Nest RadioButton Instances. Drag and Drop GroupBox and inside it Drag and Drop Radio Button Control and Button Control. By using the Nesting Strategy, you can have Multiple groups of RadioButtons on a Single Form.

Step 6. Coding

Coding For the Button Click Event.

private void button1_Click(object sender, EventArgs e)
{
    string scolor = "";
    if (radioButton1.Checked)
    {
        scolor = radioButton1.Text;
    }
    if (radioButton2.Checked)
    {
        scolor = radioButton2.Text;
    }
    if (radioButton3.Checked)
    {
        scolor = radioButton3.Text;
    }
    MessageBox.Show(scolor);
}
private void button2_Click(object sender, EventArgs e)
{
    Getcolor(radioButton4);
    Getcolor(radioButton5);
    Getcolor(radioButton6);
}
private void Getcolor(RadioButton rdoButton)
{
    if (rdoButton.Checked)
    {
        MessageBox.Show(rdoButton.Text);
    }
}

Step 7. Sample Output

Compile and Run the code. The following Output will be obtained as given below in the Screenshot. When One Option is Chosen from Group of Options of RadioButtons then the Selected Option will be displayed in the Message Box When the Button is Clicked.

Summary

RadioButton is Similar to that Checkbox the only Difference is in RadioButton We can Select only One Option But in the Checkbox We can Select Multiple Options. Thanks For Reading My article.If there is any error or Problem with the Code feel free to comment it below. I will try to solve the problem.

Источник

Введение

RadioButton в C# — это элемент управления, позволяющий пользователю выбрать один из нескольких вариантов. Представьте себе группу переключателей в реальной жизни, например, выбор размера кофе в кофейне: маленький, средний или большой. Вы можете выбрать только один размер — это и есть суть RadioButton.

RadioButton обычно используют в Windows Forms приложениях в C#. Давайте создадим простое приложение, в котором вы сможете выбрать, например, любимый цвет.

Шаг 1: Создание проекта

Откройте Visual Studio.
Создайте новый проект Windows Forms App (.NET Framework).
Назовите его, например, RadioButtonExample.

Шаг 2: Дизайн формы

Перетащите несколько элементов RadioButton на форму из Toolbox.
Дайте им четкие имена через свойство Name, например, redRadioButton, blueRadioButton.
Установите свойство Text каждой кнопки соответственно их функциям: “Красный”, “Синий” и так далее.

Шаг 3: Работа с RadioButton

После размещения RadioButton на форме, можно управлять ими через код. Добавим код, который будет отображать выбор пользователя.

Добавление обработчика событий

Для каждой RadioButton мы добавим обработчик события CheckedChanged, который будет вызываться, когда выбрана определенная кнопка.

Для этого дважды кликните на RadioButton в дизайнере форм, Visual Studio автоматически создаст метод обработчика событий.

private void redRadioButton_CheckedChanged(object sender, EventArgs e)
{
    if (redRadioButton.Checked)
    {
        MessageBox.Show("Выбран красный цвет");
    }
}

private void blueRadioButton_CheckedChanged(object sender, EventArgs e)
{
    if (blueRadioButton.Checked)
    {
        MessageBox.Show("Выбран синий цвет");
    }
}

В этом коде при выборе RadioButton срабатывает событие CheckedChanged, и если RadioButton.Checked равно true, то есть если кнопка выбрана, появляется сообщение с текстом выбранного цвета.

Примеры использования

Пример 1: Группировка RadioButton

RadioButton можно группировать, помещая их в один контейнер, например, в GroupBox. Все кнопки в одной группе автоматически становятся взаимоисключающими — можно выбрать только одну из них.

Пример 2: Получение выбранного значения

Часто нам нужно получить значение выбранного RadioButton. Можно это сделать, проверяя свойство Checked каждой кнопки:

private void submitButton_Click(object sender, EventArgs e)
{
    if (redRadioButton.Checked)
    {
        // Код для обработки выбора "Красный"
    }
    else if (blueRadioButton.Checked)
    {
        // Код для обработки выбора "Синий"
    }
    // и так далее
}

Заключение

RadioButton в C# — это простой и удобный способ предложить пользователю выбор из нескольких вариантов, где возможен только один выбор. Использование RadioButton в ваших приложениях делает интерфейс понятным и удобным. Теперь, когда вы знаете основы работы с RadioButton в C#, вы можете легко интегрировать этот элемент управления в свои проекты, предоставляя пользователю чистый и интуитивно понятный способ выбора.

Источник

<< Back to C-SHARP

Use the RadioButton control in Windows Forms. Access the Checked property.

RadioButton allows distinct selection of several items. In each group of RadioButtons, only one can be checked or selected. Conceptually, this control implements an exclusive selection. CheckBoxes allow multiple selections at once.

Steps. To begin, you should make a new Windows Forms application in Visual Studio, and then you can add GroupBox (or Panel) controls to it. In these controls, you can nest RadioButton instances.

Tip: By using this nesting strategy, you can have multiple groups of RadioButtons on a single form.

Tip 2: You may want to add the CheckedChanged event handler on your RadioButtons.

Also: You can actually have all the RadioButtons point to the same CheckedChanged event handler using the event window in Visual Studio.

Example RadioButton program: C#

using System;
using System.Windows.Forms;

namespace WindowsFormsApplication11
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void

radioButton1_CheckedChanged

(object sender, EventArgs e)
{
// Executed when any radio button is changed.
// … It is wired up to every single radio button.
// Search for first radio button in GroupBox.
string result1 = null;
foreach (Control control in this.groupBox1.Controls)
{
if (control is RadioButton)
{
RadioButton radio = control as RadioButton;
if (radio.Checked)
{
result1 = radio.Text;
}
}
}
// Search second GroupBox.
string result2 = null;
foreach (Control control in this.groupBox2.Controls)
{
if (control is RadioButton)
{
RadioButton radio = control as RadioButton;
if (radio.Checked)
{
result2 = radio.Text;
}
}
}
this.Text = result1 + » « + result2;
}
}
}

Notes, example. We wired up all six RadioButtons to the radioButton1_CheckedChanged event handler. Thus, whenever the user clicks or changes the selection on the form, the above method will be executed.

Info: The radioButton1_CheckedChanged event handler has logic to update the title bar text whenever the user changes the selection of RadioButtons.

And: We loop over each sub-control of groupBox1 and groupBox2. When we encounter a RadioButton, we access Checked and Text.

Finally: We set the title text of the Window to our findings. This is to show the program correctly works.

Groups. In Windows Forms, the RadioButton controls are grouped according to their enclosing control. To create multiple groups of RadioButtons, you would need to add containers such as Panel or GroupBox and then put RadioButtons inside.

RadioButton, CheckBox. So when should you use a RadioButton as opposed to a CheckBox? If only one option can be logically selected, then you should use a RadioButton. If more than one (or zero) options can be selected, you should use the CheckBox.

Note: The example screenshot is only correct if the user can only have one Pet and only have one Home.

Also: For animal lovers or people who are wealthy and own many homes, the dialog would not be sufficient.

Summary. The RadioButton provides a user interface for an exclusive selection. We looked at how to use event handlers on RadioButtons. We also saw how to imperatively search RadioButtons for the checked one.

And: We discussed, conceptually, the use of RadioButtons and also their grouping behavior.

CheckBox

Radiobutton

Ways to Create a Radio Button In Windows Forms

Drag and drop ( Design-Time)

Custom Button (Run Time)

Properties

Events

Introduction

RadioButton Control

Step 1. Start the Project

Step 2. Drag and Drop Control

Step 3. Coding For Button Click Event

Step 4. Compile and Run-Sample output

Step 5. GroupBox Control

Step 6. Coding

Step 7. Sample Output

Summary

Введение

Шаг 1: Создание проекта

Шаг 2: Дизайн формы

Шаг 3: Работа с RadioButton

Добавление обработчика событий

Примеры использования

Пример 1: Группировка RadioButton

Пример 2: Получение выбранного значения

Заключение

Related Links:

Related Links