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CheckBoxList RepeatLayout - How Did I Miss That???

Posted in: ASP.NET

The thing that annoys me when using ASP.NET controls is the amount of cluttered HTML that gets generated. It sometimes reminds of my early web development days when Dreamweaver was the development tool of choice. That was a long time ago!

CheckBoxList

By default when using a Checkbox or Radio button list, the following markup is generated:

<table id="MainContent_TestCheckList">
    <tbody>
            <tr>
                <td>
                    <input type="checkbox" value="1" name="ctl00$MainContent$TestCheckList$0" id="MainContent_TestCheckList_0"><label for="MainContent_TestCheckList_0">Item 1</label>
                </td>
                <td>
                    <input type="checkbox" value="2" name="ctl00$MainContent$TestCheckList$1" id="MainContent_TestCheckList_1"><label for="MainContent_TestCheckList_1">Item 2</label>
                </td>
                <td>
                    <input type="checkbox" value="3" name="ctl00$MainContent$TestCheckList$2" id="MainContent_TestCheckList_2"><label for="MainContent_TestCheckList_2">Item 3</label>
                </td>
                <td>
                    <input type="checkbox" value="4" name="ctl00$MainContent$TestCheckList$3" id="MainContent_TestCheckList_3"><label for="MainContent_TestCheckList_3">Item 4</label>
                </td>
            </tr>
    </tbody>
</table>

Yuck!

Thankfully, this control contains a property called “RepeatLayout” that gives us the option to render our list of checkboxes or radio buttons in a much nicer way.

Flow

Rendered within a <span> container.

<span id="MainContent_TestCheckList">
    <input type="checkbox" value="1" name="ctl00$MainContent$TestCheckList$0" id="MainContent_TestCheckList_0"><label for="MainContent_TestCheckList_0">Item 1</label>
    <input type="checkbox" value="2" name="ctl00$MainContent$TestCheckList$1" id="MainContent_TestCheckList_1"><label for="MainContent_TestCheckList_1">Item 2</label>
    <input type="checkbox" value="3" name="ctl00$MainContent$TestCheckList$2" id="MainContent_TestCheckList_2"><label for="MainContent_TestCheckList_2">Item 3</label>
    <input type="checkbox" value="4" name="ctl00$MainContent$TestCheckList$3" id="MainContent_TestCheckList_3"><label for="MainContent_TestCheckList_3">Item 4</label>
</span>

OrderedList or UnorderedList

Rendered within a <ul> (unordered list) or <ol> (ordered list). Note: Multi-column layouts (RepeatColumns attribute) are not supported when using this option.

<ul id="MainContent_TestCheckList">
    <li><input type="checkbox" value="1" name="ctl00$MainContent$TestCheckList$0" id="MainContent_TestCheckList_0"><label for="MainContent_TestCheckList_0">Item 1</label></li>
    <li><input type="checkbox" value="2" name="ctl00$MainContent$TestCheckList$1" id="MainContent_TestCheckList_1"><label for="MainContent_TestCheckList_1">Item 2</label></li>
    <li><input type="checkbox" value="3" name="ctl00$MainContent$TestCheckList$2" id="MainContent_TestCheckList_2"><label for="MainContent_TestCheckList_2">Item 3</label></li>
    <li><input type="checkbox" value="4" name="ctl00$MainContent$TestCheckList$3" id="MainContent_TestCheckList_3"><label for="MainContent_TestCheckList_3">Item 4</label></li>
</ul>

Table

We won’t be using this option.

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