Selecting all nodes up to a row with a condition using XPath - html

Question

Given this HTML:
<!-- ...similar content... -->
<tr>
<td colspan="3" class="pcipgSubHeader"><b>November 2021</b></td>
</tr>
<tr class="pcipgAddTopPadding">
<td></td>
<td width="40px"><b>Qty</b></td>
<td width="80px"><b>Each</b></td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>1</td>
<td>~CA $12.5669</td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>1</td>
<td>~CA $16.4506</td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>4</td>
<td>~CA $17.5517</td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>1</td>
<td>~CA $24.0738</td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>1</td>
<td>~CA $24.7314</td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>1</td>
<td>~CA $25.4772</td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>1</td>
<td>~CA $33.8775</td>
</tr>
<tr>
<td style="text-align: left; padding-left: 5px;"></td>
<td>1</td>
<td>~CA $35.3709</td>
</tr>
<tr>
<td colspan="3"> </td>
</tr>
<tr>
<td></td>
<td width="80px">Total Lots:</td>
<td><b>8</b></td>
</tr>
<tr>
<td></td>
<td>Total Qty:</td>
<td><b>11</b></td>
</tr>
<tr>
<td></td>
<td>Min Price:</td>
<td><b>CA $12.5669</b></td>
</tr>
<tr>
<td></td>
<td>Avg Price:</td>
<td><b>CA $23.7625</b></td>
</tr>
<tr>
<td></td>
<td>Qty Avg Price:</td>
<td><b>CA $22.0686</b></td>
</tr>
<tr class="pcipgAddBottomPadding">
<td></td>
<td>Max Price:</td>
<td><b>CA $35.3709</b></td>
</tr>
<!-- ...similar content... -->
and with a reference to . being the first row shown (though not the first row looking like that), I need to select all subsequent rows up to and excluding the first row that has a td with a colspan. This does not work:
./following-sibling::tr[preceding-sibling::tr[td[#colspan]]]
In a C#/HTML Agility Pack XPath expression, it doesn't stop at the desired row, and runs all the way to the end of the parent node.

Answer 1

This XPath,
//tr[td/#class='pcipgSubHeader']
/following-sibling::tr[not(td/#colspan) and
count(preceding-sibling::tr/td/#colspan) = 1]
will select all tr elements starting at the one that has the noted td child and progressing through all sibling tr elements until and excluding the next tr element that has a td child with a colspan attribute.
Or, if as stated in the question it may be assumed that the targeted start tr element is the current node:
./following-sibling::tr[not(td/#colspan) and
count(preceding-sibling::tr/td/#colspan) = 1]