blocks|key|1397065|text|您可以针对一个处理程序连接所有按钮的CheckedEvents。在那里，您可以很容易地获得正确的复选框。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1397066|//+Wire+all+events+into+this.
private+void+AllCheckBoxes_CheckedChanged(Object+sender,+EventArgs+e)+{
++++//+Check+of+the+raiser+of+the+event+is+a+checked+Checkbox.
++++//+Of+course+we+also+need+to+to+cast+it+first.
++++if+(((RadioButton)sender).Checked)+{
++++++++//+This+is+the+correct+control.
++++++++RadioButton+rb+=+(RadioButton)sender;
++++}
}|code-block|syntax|javascript|1397067|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.forms.checkbox.checkedchanged.aspx^0|I|D|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

You can wire the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.checkbox.checkedchanged.aspx" rel="noreferrer">CheckedEvents</a> of all the buttons against one handler. There you can easily get the correct Checkbox.

<pre><code>// Wire all events into this.
private void AllCheckBoxes_CheckedChanged(Object sender, EventArgs e) {
 // Check of the raiser of the event is a checked Checkbox.
 // Of course we also need to to cast it first.
 if (((RadioButton)sender).Checked) {
 // This is the correct control.
 RadioButton rb = (RadioButton)sender;
 }
}
</code></pre>

blocks|key|1181717|text|您可以使用LINQ：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1181718|var+checkedButton+=+container.Controls.OfType<RadioButton>()
++++++++++++++++++++++++++++++++++++++.FirstOrDefault(r+=>+r.Checked);|code-block|syntax|javascript|1181719|请注意，这要求所有单选按钮都直接位于同一容器中(例如，Panel或Form)，并且容器中只有一个组。如果不是这样，您可以在构造函数中为每个组创建List<RadioButton>，然后编写list.FirstOrDefault(r+=>+r.Checked)。|offset|length|style|CODE|1181720|entityMap^0|0|0|20|H|2M|Z|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

You could use LINQ:

<pre><code>var checkedButton = container.Controls.OfType&lt;RadioButton&gt;()
 .FirstOrDefault(r =&gt; r.Checked);
</code></pre>

Note that this requires that all of the radio buttons be directly in the same container (eg, Panel or Form), and that there is only one group in the container. If that is not the case, you could make <code>List&lt;RadioButton&gt;</code>s in your constructor for each group, then write <code>list.FirstOrDefault(r =&gt; r.Checked)</code>.

blocks|key|1181754|text|您可以对所有RadioButtons使用CheckedChanged事件。Sender将是未选中和选中的RadioButtons。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1181755|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.forms.radiobutton.checkedchanged.aspx^0|11|6|K|E|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

You can use the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.radiobutton.checkedchanged.aspx" rel="noreferrer">CheckedChanged</a> event for all your RadioButtons. <code>Sender</code> will be the unchecked and checked RadioButtons.

blocks|key|1397188|text|对于那些没有LINQ的用户：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1397189|RadioButton+GetCheckedRadio(Control+container)
{
++++foreach+(var+control+in+container.Controls)
++++{
++++++++RadioButton+radio+=+control+as+RadioButton;

++++++++if+(radio+!=+null+&&+radio.Checked)
++++++++{
++++++++++++return+radio;
++++++++}
++++}

++++return+null;
}|code-block|syntax|javascript|1397190|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For those without LINQ:

<pre><code>RadioButton GetCheckedRadio(Control container)
{
 foreach (var control in container.Controls)
 {
 RadioButton radio = control as RadioButton;

 if (radio != null &amp;&amp; radio.Checked)
 {
 return radio;
 }
 }

 return null;
}
</code></pre>

blocks|key|1397260|text|可以使用扩展方法迭代单选按钮的Parent.Controls集合。这允许您查询同一作用域中的其他RadioButtons。使用两种扩展方法，您可以使用第一种方法确定是否选择了组中的任何RadioButtons，然后使用第二种方法获得选择。RadioButton标签字段可用于保存一个枚举，以标识组中的每个RadioButton：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1397261|++++public+static+int+GetRadioSelection(this+RadioButton+rb,+int+Default+=+-1)+{
++++++++foreach(Control+c+in++rb.Parent.Controls)+{
++++++++++++RadioButton+r+=+c+as+RadioButton;
++++++++++++if(r+!=+null+&&+r.Checked)+return+Int32.Parse((string)r.Tag);
++++++++}
++++++++return+Default;
++++}

++++public+static+bool+IsRadioSelected(this+RadioButton+rb)+{
++++++++foreach(Control+c+in++rb.Parent.Controls)+{
++++++++++++RadioButton+r+=+c+as+RadioButton;
++++++++++++if(r+!=+null+&&+r.Checked)+return+true;
++++++++}
++++++++return+false;
++++}|code-block|syntax|javascript|1397262|下面是一个典型的使用模式：|1397263|if(!MyRadioButton.IsRadioSelected())+{
+++MessageBox.Show("No+radio+selected.");
+++return;
}
int+selection+=+MyRadioButton.GetRadioSelection;|1397264|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can use an Extension method to iterate the RadioButton's Parent.Controls collection. This allows you to query other RadioButtons in the same scope. Using two extension methods, you can use the first determine whether any RadioButtons in the group are selected, then use the second to get the selection. The RadioButton Tag field can be used to hold an Enum to identify each RadioButton in the group:

<pre><code> public static int GetRadioSelection(this RadioButton rb, int Default = -1) {
 foreach(Control c in rb.Parent.Controls) {
 RadioButton r = c as RadioButton;
 if(r != null &amp;&amp; r.Checked) return Int32.Parse((string)r.Tag);
 }
 return Default;
 }

 public static bool IsRadioSelected(this RadioButton rb) {
 foreach(Control c in rb.Parent.Controls) {
 RadioButton r = c as RadioButton;
 if(r != null &amp;&amp; r.Checked) return true;
 }
 return false;
 }
</code></pre>

Here's a typical use pattern:

<pre><code>if(!MyRadioButton.IsRadioSelected()) {
 MessageBox.Show("No radio selected.");
 return;
}
int selection = MyRadioButton.GetRadioSelection;
</code></pre>

blocks|key|1397411|text|操作员想要按组获得检查过的RadioButton。虽然@SLaks的答案很好，但它并没有真正回答OP的主要问题。要改进@SLaks的答案，只需将LINQ更进一步。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1397412|下面是我自己的工作代码中的一个示例。根据普通的WPF，我的RadioButtons包含在一个Grid+(名为"myGrid")中，还有一堆其他类型的控件。我在网格中有两个不同的RadioButton组。|offset|length|style|CODE|1397413|要从特定组中获取选中的RadioButton，请执行以下操作：|1397414|List<RadioButton>+radioButtons+=+myGrid.Children.OfType<RadioButton>().ToList();
RadioButton+rbTarget+=+radioButtons
++++++.Where(r+=>+r.GroupName+==+"GroupName"+&&+r.IsChecked)
++++++.Single();|code-block|syntax|javascript|1397415|如果您的代码可能没有选中RadioButtons，那么使用SingleOrDefault()+(如果我没有使用三态按钮，那么我总是将一个按钮"IsChecked“设置为默认选择)。|1397416|entityMap^0|0|1A|4|0|0|0|T|H|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|W|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|X|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

The OP wanted to get the checked RadioButton BY GROUP. While @SLaks' answer is excellent, it doesn't really answer the OP's main question. To improve on @SLaks' answer, just take the LINQ one step further.

Here's an example from my own working code. Per normal WPF, my RadioButtons are contained in a <code>Grid</code> (named "myGrid") with a bunch of other types of controls. I have two different RadioButton groups in the Grid.

To get the checked RadioButton from a particular group:

<pre><code>List&lt;RadioButton&gt; radioButtons = myGrid.Children.OfType&lt;RadioButton&gt;().ToList();
RadioButton rbTarget = radioButtons
 .Where(r =&gt; r.GroupName == "GroupName" &amp;&amp; r.IsChecked)
 .Single();
</code></pre>

If your code has the possibility of no RadioButtons being checked, then use <code>SingleOrDefault()</code> (If I'm not using tri-state buttons, then I always set one button "IsChecked" as a default selection.)

blocks|key|1181968|text|如果您想将选择保存到文件或任何其他文件中，并在以后调用它，下面是我要做的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1181969|string[]+lines+=+new+string[1];

lines[0]++=+groupBoxTes.Controls.OfType<RadioButton>()
++++++++++++.FirstOrDefault(r+=>+r.Checked).Text;

File.WriteAllLines("Config.ini",+lines);|code-block|syntax|javascript|1181970|然后使用以下命令调用它|1181971|string[]+ini+=+File.ReadAllLines("Config.ini");
groupBoxTes.Controls.OfType<RadioButton>()
.FirstOrDefault(r+=>+(r.Text+==+ini[0])).Checked+=+true;|1181972|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

if you want to save the selection to file or any else and call it later, here what I do

<pre><code>string[] lines = new string[1];

lines[0] = groupBoxTes.Controls.OfType&lt;RadioButton&gt;()
 .FirstOrDefault(r =&gt; r.Checked).Text;

File.WriteAllLines("Config.ini", lines);
</code></pre>

then call it with

<pre><code>string[] ini = File.ReadAllLines("Config.ini");
groupBoxTes.Controls.OfType&lt;RadioButton&gt;()
.FirstOrDefault(r =&gt; (r.Text == ini[0])).Checked = true;
</code></pre>

blocks|key|1181996|text|如果想要获取控件内选定单选按钮的索引，可以使用此方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1181997|public+static+int+getCheckedRadioButton(Control+c)
{
++++int+i;
++++try
++++{
++++++++Control.ControlCollection+cc+=+c.Controls;
++++++++for+(i+=+0;+i+<+cc.Count;+i%2B%2B)
++++++++{
++++++++++++RadioButton+rb+=+cc[i]+as+RadioButton;
++++++++++++if+(rb.Checked)
++++++++++++{
++++++++++++++++return+i;
++++++++++++}
++++++++}
++++}
++++catch
++++{
++++++++i+=+-1;
++++}
++++return+i;
}|code-block|syntax|javascript|1181998|示例用法：|1181999|int+index+=+getCheckedRadioButton(panel1);|1182000|代码没有经过很好的测试，但索引顺序似乎是从左到右，从上到下，就像阅读文本时一样。如果没有找到单选按钮，则该方法返回-1。|1182001|更新:如果控件中没有单选按钮，我的第一次尝试就不会成功。我添加了一个try+and+catch块来解决这个问题，现在这个方法似乎可以工作了。|1182002|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

If you want to get the index of the selected radio button inside a control you can use this method:

<pre><code>public static int getCheckedRadioButton(Control c)
{
 int i;
 try
 {
 Control.ControlCollection cc = c.Controls;
 for (i = 0; i &lt; cc.Count; i++)
 {
 RadioButton rb = cc[i] as RadioButton;
 if (rb.Checked)
 {
 return i;
 }
 }
 }
 catch
 {
 i = -1;
 }
 return i;
}
</code></pre>

Example use:

<pre><code>int index = getCheckedRadioButton(panel1);
</code></pre>

The code isn't that well tested, but it seems the index order is from left to right and from top to bottom, as when reading a text. If no radio button is found, the method returns -1.

Update: It turned out my first attempt didn't work if there's no radio button inside the control. I added a try and catch block to fix that, and the method now seems to work.

blocks|key|1182035|text|除了CheckedChangedEvent连接之外，还可以使用控件的"Tag“属性来区分单选按钮……一个(意大利面条代码)替代方法是"TabIndex“属性;P|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1182036|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In addition to the CheckedChangedEvent wiring one could use the Controls "Tag" property to distinguish between the radio buttons... an (spaghetti code) alternative would be the "TabIndex" property ;P

blocks|key|1397554|text|如果您使用的是WinForms，则GroupBox有一个用于此目的的已验证事件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1397555|private+void+grpBox_Validated(object+sender,+EventArgs+e)
++++{
++++++++GroupBox+g+=+sender+as+GroupBox;
++++++++var+a+=+from+RadioButton+r+in+g.Controls
+++++++++++++++++where+r.Checked+==+true+select+r.Name;
++++++++strChecked+=+a.First();
+++++}|code-block|syntax|javascript|1397556|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The GroupBox has a Validated event for this purpose, if you are using WinForms.

<pre><code>private void grpBox_Validated(object sender, EventArgs e)
 {
 GroupBox g = sender as GroupBox;
 var a = from RadioButton r in g.Controls
 where r.Checked == true select r.Name;
 strChecked = a.First();
 }
</code></pre>

blocks|key|1182131|text|对于使用VB.NET的开发人员|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1182132|Private+Function+GetCheckedRadio(container)+As+RadioButton
++++For+Each+control+In+container.Children
++++++++Dim+radio+As+RadioButton+=+TryCast(control,+RadioButton)

++++++++If+radio+IsNot+Nothing+AndAlso+radio.IsChecked+Then
++++++++++++Return+radio
++++++++End+If
++++Next

++++Return+Nothing
End+Function|code-block|syntax|javascript|1182133|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For developers using VB.NET

 

<pre><code>Private Function GetCheckedRadio(container) As RadioButton
 For Each control In container.Children
 Dim radio As RadioButton = TryCast(control, RadioButton)

 If radio IsNot Nothing AndAlso radio.IsChecked Then
 Return radio
 End If
 Next

 Return Nothing
End Function
</code></pre>

Using WinForms; Is there a better way to find the checked RadioButton for a group? It seems to me that the code below should not be necessary. When you check a different RadioButton then it knows which one to uncheck… so it should know which is checked. How do I pull that information without doing a lot of if statements (or a switch).

<pre><code> RadioButton rb = null;

 if (m_RadioButton1.Checked == true)
 {
 rb = m_RadioButton1;
 }
 else if (m_RadioButton2.Checked == true)
 {
 rb = m_RadioButton2;
 }
 else if (m_RadioButton3.Checked == true)
 {
 rb = m_RadioButton3;
 }
</code></pre>

Which Radio button in the group is checked?

容器

使用WinForms；是否有更好的方法来查找组的选中RadioButton？在我看来，下面的代码应该是不必要的。当您选中一个不同的RadioButton时，它就会知道取消选中哪个…因此，它应该知道选中了哪一个。如何在不执行大量if语句(或switch)的情况下提取这些信息。     RadioButton rb = n...

问选中组中的哪个单选按钮？
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