AJAX Control toolkit – MutuallyExclusiveCheckBox

該控制項可以擴充到ASP.NET CheckBox,一組都添加該擴充的複選框只要設定相同的key，那麼一次就只有一個複選框能被選中（Checked），類似Radio Button。The use of checkboxes however allows you to choose to uncheck a value which is not possible normally with radio buttons. This also provides a more consistent and expected interface than using javascript to allow the de-selection of a RadioButton item.

<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<br />
<table>
<tr>
<td style="width: 163px; height: 30px;">
                    IS over 25 Years of Age
</td>
<td style="width: 186px; height: 30px;">
                    IS over 35 Years of Age
</td>
<td style="width: 186px; height: 30px;">
                    IS over 45 Years of Age
</td>
</tr>
<tr>
<td style="width: 163px">
<asp:CheckBox ID="IsOver25" runat="server" Text="I am over 25 years old." /><br />
<ajaxToolkit:MutuallyExclusiveCheckBoxExtender ID="IsOver25Ex" runat="server" TargetControlID="IsOver25"
                        Key="AgeChoice" />
</td>
<td style="width: 186px">
<asp:CheckBox ID="IsOver35" runat="server" Text="I am Over 35 years old." /><br />
<ajaxToolkit:MutuallyExclusiveCheckBoxExtender ID="IsNotOver35Ex" runat="server"
                        TargetControlID="IsOver35" Key="AgeChoice" />
</td>
<td style="width: 186px">
<asp:CheckBox ID="IsOver45" runat="server" Text="I am Over 45 years old." /><br />
<ajaxToolkit:MutuallyExclusiveCheckBoxExtender ID="IsNotOver5Ex" runat="server" TargetControlID="IsOver45"
                        Key="AgeChoice" />
</td>
</tr>
</table>

 

TargetControlID - The ID of the CheckBox to Modify.

key - The Unique key to use to associate checkboxes.This key does not respect INamingContainer renaming.