如何在C＃中选中或不选中Html单选按钮？ [英] How Can I Check Html Radio Button Is Selected Or Not In C#

问题描述

我已动态创建三个html单选按钮



在C＃中我需要检查所有单选按钮是否被选中

< input type =   radio name =  答案 id =  < span class =code-string> radiodynamic1 >  
< input type =    radio name =  答案  id =   radiodynamic2 >  
< input type =   radio name =  答案 id =   RA diodynamic3 >  
 

我有点数

  for （  int  i =  1 ; i <  =  3 ; i ++）
 {
  if （Request [  radiodynamic + i]！=  null ）
 {
  //  这里如何选中是否选中单选按钮 
 
} 
 
} 

但它无法正常工作



如何检查收音机是否选择了按钮

请帮助我

解决方案

 将属性下方的添加到单选按钮，然后检查已检查属性 代码behin 
 
< input type =   radio id =   radioExample1 runat =   server /> 
 
  //  代码隐藏 
  if （radioExample1.Checked）
 {
  //  写你的代码在这里 
} 

//让我知道它是否对你有帮助

你应该为每个按钮附加一个Javascript onclick事件处理程序：

< input type =    radio name =  答案  onclick =   answer_click（this）; value =   1> 
< input type =   radio name =  回答 onclick =   answer_click（this）; value =   2> 
< input type =   radio name =  回答 onclick =   answer_click（this）; value =   3> 

某处，定义Javascript函数 answer_click ：



< pre lang =Javascript> function answer_click（radio_button）
{
switch （radio_button.value）
{
case 1 ：
代码块 1
break ;

case 2 ：
代码块 2
break ;

case 3 ：
代码块 3
break ;

默认：
代码块 for 当radio_button .value不是 1 ， 2 ，或 3
break ;
}

I have create dynamically three html radio button

In C# I need check all radio buttons are selected or not

<input type="radio" name="Answer" id="radiodynamic1">
<input type="radio" name="Answer" id="radiodynamic2">
<input type="radio" name="Answer" id="radiodynamic3">

I have count

for (int i = 1; i <= 3; i++)
              {
                  if (Request["radiodynamic" + i] != null)
                  {
// here how can i check radio button is selected or not

}

}

but it will not work properly

how can i check if radio buttons are selected or not
Please help me

解决方案

add below property to the radio buttons and check the checked property in code behin

<input type="radio" id="radioExample1" runat="server" />

//code behind 
if (radioExample1.Checked)
{
     //write your code here
}

//let me know whether it helps you or not

You should attach a Javascript onclick event handler to each button:

<input type="radio" name="Answer" onclick="answer_click(this);" value="1">
<input type="radio" name="Answer" onclick="answer_click(this);" value="2">
<input type="radio" name="Answer" onclick="answer_click(this);" value="3">

Somewhere, define the Javascript function answer_click:

function answer_click ( radio_button )
  {
  switch ( radio_button.value )
    {
    case 1:
      code block 1
      break;

    case 2:
      code block 2
      break;

    case 3:
      code block 3
      break;

    default:
      code block for when radio_button.value is not 1, 2, or 3 
      break;
    }

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