Getting elements within an element...

[BobRoyAce]

I've got a WebBrowser control on a form, called WebBrowser1, and,
through code, I navigate to a web page. Now, on this web page, among
many other things, there is a <TABLE > with several rows, each having
five columns, two of which I care about.

Well I can use code as follows to find a particular TABLE on the
page...

Dim oElement As HtmlElement = WebBrowser1.Document.GetElementById
("tblSubmitSales")

This works great as I get back the TABLE element I was after.

Now, what I need to do is go after each ROW element in the returned
table element. Then, I'll want to be able to interrogate each Cell
(<TD>) element within each ROW element.

Is there a straightforward way to do this. Ideally, there'd be some
method, similar to "GetElementsByTagName", as then I could do
something like...

Dim oRowCollection As HtmlElementCollection
oRowCollection = oElement.GetElementsByTagName("TR")

Dim oCellCollection as HtmlElementCollection
For Each oElement as HtmlElement in oRowCollection
oCellCollection = oElement.GetElementsByTagName("TD")

' Do something with the cell elements here...
Next

I'd appreciate any insights on this.

In addition, are there any really good sources of detailed/extensive
information on using the WebBrowser control?

 

[Lloyd Sheen]

I've got a WebBrowser control on a form, called WebBrowser1, and,
through code, I navigate to a web page. Now, on this web page, among
many other things, there is a <TABLE > with several rows, each having
five columns, two of which I care about.

Well I can use code as follows to find a particular TABLE on the
page...

Dim oElement As HtmlElement = WebBrowser1.Document.GetElementById
("tblSubmitSales")

This works great as I get back the TABLE element I was after.

Now, what I need to do is go after each ROW element in the returned
table element. Then, I'll want to be able to interrogate each Cell
(<TD>) element within each ROW element.

Is there a straightforward way to do this. Ideally, there'd be some
method, similar to "GetElementsByTagName", as then I could do
something like...

Dim oRowCollection As HtmlElementCollection
oRowCollection = oElement.GetElementsByTagName("TR")

Dim oCellCollection as HtmlElementCollection
For Each oElement as HtmlElement in oRowCollection
oCellCollection = oElement.GetElementsByTagName("TD")

' Do something with the cell elements here...
Next

I'd appreciate any insights on this.

In addition, are there any really good sources of detailed/extensive
information on using the WebBrowser control?

There is a method GetElementsByTagName. If you have the table element you
can do exactly what you are describing.

An example which I use:

Dim doc As HtmlDocument = WebBrowser1.Document
Dim tab As HtmlElement = doc.GetElementById("ExpansionTable1")
ListView1.Items.Clear()
Dim trs As HtmlElementCollection = tab.GetElementsByTagName("TR")
For Each tr As HtmlElement In trs
Dim tmp As Integer = 1
If tr.OuterHtml.Contains("class=visible") And
tr.OuterHtml.Contains("id=trlink") Then
Dim tds As HtmlElementCollection = tr.GetElementsByTagName("TD")
Dim li As New ListViewItem
li.Text = tds(4).InnerText
li.SubItems.Add(tds(2).InnerText)
ListView1.Items.Add(li)
End If
Next

LS

 

[BobRoyAce]

There is a method GetElementsByTagName.  If you have the table element you

can do exactly what you are describing.

Well, I'll be...I never even thought to check that...kinda silly of
me.

Thanks for the insights, and the sample code. I was able to adapt
perfectly for my needs!