How to grab info from HTML page? - html

Question

Please, help me grab information from this structure:
<table id="id1" class="class1">
<tbody>
<tr id="id2">
<td>
<span class="class2">
"header text"
</span>
</td>
<td id="d" style="width:10px;">
<img style="width:10px;" src="/images/img1.gif">
</td>
<td id="r" style="width:40%;">
<span class="class2">
<nobr>Headings:</nobr>
</span>
</td>
</tr>
<tr>
<td>
<table class="class1" style="width:100%;">
<tbody>
<tr>
<td width="300" valign="top"></td>
</tr>
<tr>
<td style="padding:0px;">
<div>
<b>Address: </b>
Address text
</div>
<div>
<b>Tel.: </b>
250-1729
</div>
<br>
</td>
</tr>
</tbody>
</table>
</td>
<td>
<img src="/images/img.gif">
</td>
<td>
heading1
<br>
heading2
<br>
heading3
<br>
</td>
</tr>
</tbody>
I want to get:
header text
Address text
Tel. number
but I don't understand, how can I get it with PowerShell.
Firstly, I get this table
$address = "http://address.com"
$page = Invoke-WebRequest $address
$table = $($page.parsedhtml.getElementsByTagName("table") | Where { $_.id -eq 'id1' })
What's next?
How can I call table's children and get their texts?

Answer 1

This is my decision:
$address = "http://address.com"
$page = Invoke-WebRequest $address
$table = $($page.parsedhtml.getElementById("id1")
$tr = $table.getElementsByTagName('tr') | Where { $_.id -eq 'id2' }
$name=($tr.getElementsByTagName('a') | select -First 1).innertext
$divs=$table.getElementsByTagName('div')
foreach ($div in $divs) {
if ($div.innertext -match "address: ") {$adr=$div.innertext -replace "Address: ",""}
if ($div.innertext -match "Tel.: ") {$tel=$div.innertext -replace "Tel.: ",""}
}
$resultmassive+=[string]::Join(";",$name,$adr,$tel)
p.s. Maybe, it is possible to use PowerShell switch-case construcion instead foreach, but it doesn't works for me.

Answer 2

First and foremost: if your elements have an ID use getElementById() instead of getElementsByTagName() with an additional filter. That will give you the correct table (or other element) right away.
When you have the (parent) element you can get nested elements by calling getElementById(), getElementsByTagName(), etc. on the parent:
$nestedTables = $table.getElementsByTagName('table')
In your case you want to get
the child element with the ID id2 and then the (grand)child <a> element (for the header text)
$tr = $table.getElementById('id2')
$tr.getElementsByTagName('a')
the <div> elements in the nested table (for the address and phone number):
$table.getElementsByTagName('div')