I would like to extend the ASP.NET DataGrid web control to add lots of additional features but most important of all, I would like to make the body of the grid scrollable.
I have the HTML worked out but overriding the rendering of the control is confusing. The basic structure of final control should look like so:
<div id="grid1" class="grid">
<div class="grid-header">
<div class="grid-header-l"></div>
<div class="grid-header-c">
<div class="grid-header-wrapper">
<div class="wrapper">Grid Header</div>
</div>
</div>
<div class="grid-header-r"></div>
</div>
<div class="grid-body">
<div class="grid-column-headers">
<div class="grid-column-headers-l"></div>
<div class="grid-column-headers-c">
<div class="grid-column-headers-wrapper">
<table class="grid-column-header-table" cellpadding="0" cellspacing="0" border="0">
<tbody>
<tr>
<td>
<div class="grid-column-header-cell asc">
<div class="grid-column-header-cell-wrapper">
<div class="grid-column-header-text" title="Column Header Name">Column Header Name</div>
<a href="javascript:;" class="grid-column-header-button" title="Hide/Show Columns"><span></span></a>
<div class="grid-column-header-divider"></div>
</div>
</div>
</td>
<td>
<div class="grid-column-header-cell">
<div class="grid-column-header-cell-wrapper">
<div class="grid-column-header-text" title="Column Header Name">Column Header Name</div>
<a href="javascript:;" class="grid-column-header-button" title="Hide/Show Columns"><span></span></a>
<div class="grid-column-header-divider"></div>
</div>
</div>
</td>
<td class="last">
<div class="grid-column-header-cell">
<div class="grid-column-header-cell-wrapper">
<div class="grid-column-header-text" title="Column Header Name">Column Header Name</div>
<a href="javascript:;" class="grid-column-header-button" title="Hide/Show Columns"><span></span></a>
<div class="grid-column-header-divider"></div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="grid-column-headers-r"></div>
</div>
<div class="grid-body-content">
<div class="grid-body-content-t">
<div class="grid-body-content-t-l"></div>
<div class="grid-body-content-t-c"></div>
<div class="grid-body-content-t-r"></div>
</div>
<div class="grid-body-content-m">
<div class="grid-body-content-m-l"></div>
<div class="grid-body-content-m-c">
<div class="grid-body-content-wrapper">
<div class="scroll-wrapper">
<table class="grid-content-table" cellpadding="0" cellspacing="0" border="0">
<tbody>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
<tr>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
<td>
<div class="grid-content-cell">Cell Text/Value</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="grid-body-content-m-r"></div>
</div>
<div class="grid-body-content-b">
<div class="grid-body-content-b-l"></div>
<div class="grid-body-content-b-c"></div>
<div class="grid-body-content-b-r"></div>
</div>
</div>
</div>
Anyone know what the best approach should be? Can anyone point me to some tutorial? I have noticed one where the author captured the rendered html before it is sent to the response stream and altered it. I do not like to use that approach however.
Because I only wanted to modify the output of the control, 'extending' the control actually meant that I only had to override the rendering.
I found articles on control adapters that one can use to alter the output. A project exists on CodePlex named 'CSS Control Adapters'. It has been very helpful on more controls than just the DataGrid.