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How to create a radio button and see if it's checked?


How to create a radio button and see if it's checked?

By : user3849993
Date : October 21 2020, 11:12 AM
I wish this helpful for you To find out whether a radio button (or check box) is checked, send the BM_GETCHECK message to the control and check the return value. You will need the HWND of your control; to get that from the control ID, call GetDlgItem().
code :


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How to get the text from radio button in a radio group when radio button checked state is changed

How to get the text from radio button in a radio group when radio button checked state is changed


By : Juan Mora Romero
Date : March 29 2020, 07:55 AM
Does that help I have created two radio buttons in a radio group dynamically and one of them is checked. I need when i cheked another button then its value should be saved in string. But i have implemented checkedchangelistener for this.But its not working first time. Here is my code. , xml file
code :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<RadioGroup
    android:id="@+id/radioSex"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

    <RadioButton
        android:id="@+id/radioMale"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/radio_male" 
        android:checked="true" />

    <RadioButton
        android:id="@+id/radioFemale"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/radio_female" />

</RadioGroup>

<Button
    android:id="@+id/btnDisplay"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/btn_display" />

</LinearLayout>
package com.mkyong.android;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MyAndroidAppActivity extends Activity {
    private RadioGroup radioSexGroup;
    private RadioButton radioSexButton;
    private Button btnDisplay;

    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    addListenerOnButton();

    }

    public void addListenerOnButton() {

        radioSexGroup = (RadioGroup) findViewById(R.id.radioSex);
        btnDisplay = (Button) findViewById(R.id.btnDisplay);

        btnDisplay.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                    // get selected radio button from radioGroup
                int selectedId = radioSexGroup.getCheckedRadioButtonId();

                // find the radiobutton by returned id
                    radioSexButton = (RadioButton) findViewById(selectedId);

                Toast.makeText(MyAndroidAppActivity.this,
                    radioSexButton.getText(), Toast.LENGTH_SHORT).show();

            }

        });

    }
}
Autocheck Radio Button in JQuery (Mark a radio button as checked / unchecked based on another value)

Autocheck Radio Button in JQuery (Mark a radio button as checked / unchecked based on another value)


By : Yai Jung
Date : November 01 2020, 12:01 AM
Any of those help This is definitely one of those weird little problems that can work with slightly different versions of Jquery and slightly different syntax.
The following code shows you what now works for me and the corresponding none-working version (that works in Jquery 1.3.1):
code :
function autoCheck() {
  if (HasDescription) {
    $('input[name=AttachedJobDescription][value=True]').prop('checked', true);

    $('input[name=AttachedJobDescription][value=True]').attr('disabled', true);
    $('input[name=AttachedJobDescription][value=False]').attr('disabled', true);

  } else {
    $('input[name=AttachedJobDescription]').prop('checked', false);

    $('input[name=AttachedJobDescription][value=True]').attr('disabled', null);
    $('input[name=AttachedJobDescription][value=False]').attr('disabled', null);

  }
  HasDescription = !HasDescription;

}



function brokenAutoCheck() {
  if (HasDescription) {



    $('input[name=AttachedJobDescription][value=True]').attr('checked', true);
    $('input[name=AttachedJobDescription][value=False]').attr('checked', null);

    $('input[name=AttachedJobDescription][value=True]').attr('disabled', true);
    $('input[name=AttachedJobDescription][value=False]').attr('disabled', true);

  } else {

    $('input[name=AttachedJobDescription][value=True]').attr('checked', null);
    $('input[name=AttachedJobDescription][value=False]').attr('checked', null);

    $('input[name=AttachedJobDescription][value=True]').attr('disabled', null);
    $('input[name=AttachedJobDescription][value=False]').attr('disabled', null);

  }
  HasDescription = !HasDescription;

}
var HasDescription = true;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Yes
<input data-val="true" data-val-required="The Attached Job Description field is required." id="AttachedJobDescription" name="AttachedJobDescription" onchange="showJobDescriptionDocument();" type="radio" value="True">No
<input id="AttachedJobDescription" name="AttachedJobDescription" onchange="showJobDescriptionDocument();" type="radio" value="False">



<br>
<button type="button" onclick="autoCheck()">AutoCheck (Works)</button>
<br>
<br>
<button type="button" onclick="brokenAutoCheck()">AutoCheck (Work Once )</button>
<br>
wpf - checkbox.isvisible is ture when one of the radio button is checked or no radio button checked

wpf - checkbox.isvisible is ture when one of the radio button is checked or no radio button checked


By : samez9
Date : March 29 2020, 07:55 AM
Any of those help I am new to Wpf i have a group of 3 radio buttons for all the checkbox, it is not visible when none of the radio button is chekced or the third radio button on the group is checked. , You are right about MultiBinding. Your Xaml should look like this:
code :
<Window.Resources>
    <local:MultiBoolToVisibilityConverter x:Key="MultiBoolToVisibilityConverter"/>
</Window.Resources>
<DockPanel>
    <StackPanel DockPanel.Dock="Top">
        <RadioButton Name="rb1" Content="1"/>
        <RadioButton Name="rb2" Content="2"/>
        <RadioButton Name="rb3" Content="3"/>
    </StackPanel>
    <CheckBox DockPanel.Dock="Bottom" Content="Visible when 1 or 2 is checked.">
        <CheckBox.Visibility>
            <MultiBinding Converter="{StaticResource MultiBoolToVisibilityConverter}">
                <Binding Path="IsChecked"  ElementName="rb1" />
                <Binding Path="IsChecked"  ElementName="rb2" />
                <Binding Path="IsChecked"  ElementName="rb3" />
            </MultiBinding>
        </CheckBox.Visibility>
    </CheckBox>
</DockPanel>
public class MultiBoolToVisibilityConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        bool? firstRadioButtonIsChecked = values[0] as bool?;
        bool? secondRadioButtonIsChecked = values[1] as bool?;
        bool? thirdRadioButtonIsChecked = values[2] as bool?;

        //set your logic. this is just an example:
        if (firstRadioButtonIsChecked == true || secondRadioButtonIsChecked == true)
            return Visibility.Visible;
        return Visibility.Collapsed;

    } 

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}
Remove the default checked value in radio button and replace it with the another radio button that is click

Remove the default checked value in radio button and replace it with the another radio button that is click


By : Mister Rez
Date : March 29 2020, 07:55 AM
may help you . localStorage
Use localStorage to save the selected value then retrieve the value when page is reloaded. Note: For details on how the rest of this demo works, see this post.
code :
var xC = document.forms.container;
var xE = xC.elements;
var vR = xE.rad;
var cty = localStorage.getItem('country');
xC.addEventListener('change', saveCountry);
document.addEventListener('DOMContentLoaded', setCountry);
function saveCountry(e) {
  localStorage.setItem('country', vR.value);
  console.log("Welcome, " + vR.value);
};
function setCountry(e) {
  for (let i = 0; i < vR.length; i++) {
    if (vR[i].value === cty) {
      vR[i].checked = true;
    }
  }
  console.log("Welcome, " + vR.value);
};
var xC = document.forms.container;
var xE = xC.elements;
var vR = xE.rad;
/* 
Get the string saved in localStorage named 'country'
*/
var cty = localStorage.getItem('country');

/*| When <form> is changed
Call saveCountry()
*/
xC.addEventListener('change', saveCountry);

/*| When Page is Reloaded
Call setCountry()
*/
document.addEventListener('DOMContentLoaded', setCountry);

/*
Save the value selected in pseudo-<select> in localStorage
*/
function saveCountry(e) {
  localStorage.setItem('country', vR.value);
  console.log("Welcome, " + vR.value);
};

/*
Loop through the pseudo-<option>s
When a pseudo<option> matches the value saved...
in localStorage under the name of 'country'...
check that pseudo-<option> by assigning it...
the attribute [checked] = true
*/
function setCountry(e) {
  for (let i = 0; i < vR.length; i++) {
    if (vR[i].value === cty) {
      vR[i].checked = true;
    }
  }
  console.log("Welcome, " + vR.value);
};
html,
body {
  font: 400 small-caps 16px/1.25 Arial;
}

fieldset {
  width: fit-content;
  padding: 0;
}

legend {
  font-size: 1rem
}

details {
  width: 170px;
  cursor: pointer;
  margin: 0 4px -5px 0;
  padding: 0 5px 10px 10px;
}

summary {
  width: 100%;
  position: relative;
}


/* 
    Shows <detail>'s default arrow
    */


/*
    summary::-webkit-details-marker {
      position: absolute;
      padding: 0 0 0 5px;
      z-index: 1;
      top: 25%;
    }
    
    [open] summary::-webkit-details-marker {
      top: 5%;
    }
    
    .em {
      padding: 0 0 0 10px;
    }
    */


/*
    Hides <detail>'s default arrow
    */

summary::-webkit-details-marker {
  visibility: hidden;
  position: absolute;
  z-index: -1;
}

.em {
  padding: 0;
}


/*| Pseudo-<option>
    All pseudo-<option> are initially hidden and 
    <label class='opt'> are the only tags that will show/hide, 
    the next comment explains how.
    */

.rad {
  display: none
}

.opt {
  display: none;
  position: relative;
  z-index: 2;
  width: 100%;
  margin: 0;
  cursor: pointer;
  font-size: 0.9rem;
  box-shadow: -2px -2px 11px rgba(0, 0, 0, 0.3) inset;
}


/*| Two Conditions
    1. If <details open='true'> all <label class='opt'> are visible.
    =============================================
    2. if <input class='rad' type='radio' checked> then the 
       <label class='opt'> that proceeds the radio button is visible.
    */

[open] .opt,
.rad:checked+.opt {
  display: block;
}


/*| For Demonstration Purposes
    This ruleset changes how the console is displayed.
    */

.as-console-wrapper {
  max-height: 50%;
  font-variant: normal;
}
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Custom select box Jquery Plugin by VJ</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">

  <!--| Flag Icons
This stylesheet provides the flag icons. 
For details, go to: 
https://afeld.github.io/emoji-css/
-->

  <link href="https://afeld.github.io/emoji-css/emoji.css" rel="stylesheet">


</head>

<body>
  <form id="container">
    <fieldset>
      <legend>Country</legend>

      <!--| Pseudo-<select> 
<details> provides the dropdown behavior and
<summary> contains the pseudo-<option>
-->
      <details>
        <summary>

          <!--| 4 Pseudo-<option> 
Each <label> and <input type='radio'> pair are
synced to each other by matching the values of
<label for="ID"> and <input id="ID">. 
-->

          <!--| Trigger and State
When <label> is clicked ... <input type='radio'>
is checked. This simple "cause and effect" can
be leveraged into a system of states (ie off/on). 
For details, review the CSS. 
-->

          <input id='X' type='radio' class='rad' name='rad' value="" checked>
          <label class='opt' for='X'>
            &nbsp;&nbsp;
            <i class='em em-us'></i> United States
          </label>

          <input id='US' type='radio' class='rad' name='rad' value="United States">
          <label class='opt' for='US'>
            &nbsp;&nbsp;
            <i class='em em-us'></i> United States
          </label>

          <input id='GB' type='radio' class='rad' name='rad' value="Great Britain">
          <label class='opt' for='GB'>
            &nbsp;&nbsp;
            <i class='em em-gb'></i> Great Britain
          </label>

          <input id='IN' type='radio' class='rad' name='rad' value="India">
          <label class='opt' for='IN'>
            &nbsp;&nbsp;
            <i class='em em-flag-in'></i> India
          </label>

          <input id='NP' type='radio' class='rad' name='rad' value="Nepal">
          <label class='opt' for='NP'>
            &nbsp;&nbsp;<i class='em em-flag-np'></i>&nbsp;&nbsp;Nepal
          </label>

        </summary>
      </details>

    </fieldset>
  </form>

  <!--|For Demonstration Purposes
Provides console
-->


</body>

</html>
How will i set default radio button checked and know which radio button is checked from the radio-group in a reactive-fo

How will i set default radio button checked and know which radio button is checked from the radio-group in a reactive-fo


By : Grzegorz Dębowski
Date : March 29 2020, 07:55 AM
it helps some times Initilize the form control with the value of whatever radio button you want to be checked as default. There is no need of adding a default checked attribute in the any of the radio buttons
code :
this.form = this._fb.group({
    selectedOption: ["1", Validators.required], // this will make the second radio button checked as default.
});
this.form.get('selectedOption').value
<input (change)="foo()" id="radio-button-1" class="bx--radio-button" type="radio" formControlName="selectedOption" value="0">
// inside the method foo() check for the currently selected radio button
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