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    <p>The reason your radio buttons are not acting as a group is because you have runat="server" which will cause the name and id attributes to be prepended with parents' ids. The following will cause the radio buttons to behave as a cohesive group (note the lack of runat="server"):</p> <p>ascx code:</p> <pre><code>&lt;asp:Repeater ID="uxRadioSelections" runat="server"&gt; &lt;HeaderTemplate&gt; &lt;table border="0" width="300px"&gt; &lt;/HeaderTemplate&gt; &lt;ItemTemplate&gt; &lt;tr&gt; &lt;td&gt; &lt;input type="radio" value='&lt;%# Eval("Name") %&gt;' name="HeaderFooter" onclick="alert(this.value);"&gt;&lt;%# Eval("Name") %&gt;&lt;/input&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/ItemTemplate&gt; &lt;FooterTemplate&gt; &lt;/table&gt; &lt;/FooterTemplate&gt; &lt;/asp:Repeater&gt; </code></pre> <p>code behind:</p> <pre><code>protected void Page_Load(object sender, EventArgs e) { string[] names = new string[] {"Alvin", "Simon", "Theodore"}; uxRadioSelections.DataSource = names.Select(x =&gt; new { Name = x }); uxRadioSelections.DataBind(); } </code></pre> <p>However, the following will NOT perform as a cohesive group:</p> <pre><code>&lt;asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"&gt; Test &lt;asp:Repeater ID="uxRadioSelections" runat="server"&gt; &lt;HeaderTemplate&gt; &lt;table border="0" width="300px"&gt; &lt;/HeaderTemplate&gt; &lt;ItemTemplate&gt; &lt;tr&gt; &lt;td&gt; &lt;asp:RadioButton Text='&lt;%#Eval("Name") %&gt;' runat="server" /&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/ItemTemplate&gt; &lt;FooterTemplate&gt; &lt;/table&gt; &lt;/FooterTemplate&gt; &lt;/asp:Repeater&gt; &lt;/asp:Content&gt; </code></pre> <p>Due to the naming conventions you alluded to, these individual radio buttons will not find each other. ASP.NET uses RadioButtonLists to overcome this:</p> <p>ascx code:</p> <pre><code>&lt;asp:RadioButtonList ID="uxRadioButtons" runat="server"&gt; &lt;/asp:RadioButtonList&gt; </code></pre> <p>code behind:</p> <pre><code> protected void Page_Load(object sender, EventArgs e) { string[] names = new string[] {"Alvin", "Simon", "Theodore"}; uxRadioButtons.DataTextField = "Name"; uxRadioButtons.DataValueField = "Name"; uxRadioButtons.DataSource = names.Select(x =&gt; new { Name = x }); uxRadioButtons.DataBind(); } </code></pre> <p>This does not give you as granular control, but will provide easy server-side access to the selections. If all you need is javascript-related functionality and increased formatting flexibility, the first format may (which is nearly identical to what you provided) is your best bet. Good luck!</p>
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    1. USJaime Torres
    1. USJaime Torres
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    1. COI guess you did got the point here, The `NAME` attribute of my input radio control gets auto generated because it is in a databinding control(Repeater), because of which all instance of that radio control gets unique name so due to that uniqueness they don't act like a group and I can check multiple radio button at a time which is wrong because I want one radio button to checked at a time which is a normal behavior.
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    2. COThat is not the behavior you should be experiencing. The "name"/"id" only gets generated for runat="server" based controls, client controls (such as <input type="radio" />) do not receive the same treatment and thus will remain grouped as you have coded. If you remove runat="server" in your example, your code will work as a group. If you need server-side handling of your selections but still need the flexibilty, might I suggest either jQuery ajax calls or old-school __doPostBacks?
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    3. CO+1 I got the solution from this comment, see edit.
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