Getting the selected text of WebBrowser control dropdown box.

[Frank Rizzo]

I have a WebBrowser control on a .net 2.0 winforms app. I load up a
page and want to get the selected entry of a dropdown.

I can get the element:

HtmlElement stationList = browser.Document.GetElementById("dropdownFacID");

How do I know get the selected entry (the text, not the id).

Thanks.

 

[Mr. Arnold]

I have a WebBrowser control on a .net 2.0 winforms app. I load up a page
and want to get the selected entry of a dropdown.

I can get the element:

HtmlElement stationList =
browser.Document.GetElementById("dropdownFacID");

How do I know get the selected entry (the text, not the id).

browser.Document.GetElementById("dropdownFacID").Value;

 

[Frank Rizzo]

browser.Document.GetElementById("dropdownFacID").Value;

There is no .Value on the return of the .GetElementById method.

 

[Mr. Arnold]

There is no .Value on the return of the .GetElementById method.

I don't know about this Net method, but it's making a call to JavaScript.

Below is JavaScript

var myTextField = document.getElementById('myText');
if(myTextField.value != "")
alert("You entered: " + myTextField.value)
else
alert("Would you please enter some text?")}You can do this kind of JavaScript statement.

if (document.getElementById('myText').value != "")

Maybe, you can post to a .NET Web solution specific NG to get more help.

 

[Frank Rizzo]

I don't know about this Net method, but it's making a call to JavaScript.

Below is JavaScript

var myTextField = document.getElementById('myText');
if(myTextField.value != "")
alert("You entered: " + myTextField.value)
else
alert("Would you please enter some text?")}You can do this kind
of JavaScript statement.

if (document.getElementById('myText').value != "")

Maybe, you can post to a .NET Web solution specific NG to get more help.

It's a winforms application and a WinForms WebBrowser control.

 

[Mr. Arnold]

It's a winforms application and a WinForms WebBrowser control.

It's still making a call to JavaScript I believe. That getElementById
command is a JavaScript command and not a .NET command.

Even though it's a Winform using a WebBrowser control, who .NET is going to
make the call to do it is ASPscript or JavaScript, which are scripting
languages that work with a Web browser.

 

[Mr. Arnold]

It's a winforms application and a WinForms WebBrowser control.

Don't hold me to it, but the link may hold your solution by using the
InnerText to get the Value.

http://www.codeproject.com/aspnet/Prevent_attacks.asp

 

[Walter Wang [MSFT]]

Hi Frank,

Please try this code:

HtmlElement element = webBrowser1.Document.GetElementById("Select1");
object objElement = element.DomElement;
object objSelectedIndex =
objElement.GetType().InvokeMember("selectedIndex",
BindingFlags.GetProperty, null, objElement, null);
int selectedIndex = (int) objSelectedIndex;
if (selectedIndex != -1)
{
MessageBox.Show(element.Children[selectedIndex].InnerText);
}


Hope this helps.


Sincerely,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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[Frank Rizzo]

Hi Frank,

Please try this code:

HtmlElement element = webBrowser1.Document.GetElementById("Select1");
object objElement = element.DomElement;
object objSelectedIndex =
objElement.GetType().InvokeMember("selectedIndex",
BindingFlags.GetProperty, null, objElement, null);
int selectedIndex = (int) objSelectedIndex;
if (selectedIndex != -1)
{
MessageBox.Show(element.Children[selectedIndex].InnerText);
}

Walter,

Thanks for the code, but it didn't work out, because the dropdown has
OPTGROUPs ( http://www.w3schools.com/tags/tag_optgroup.asp ). This is
something I haven't seen up to now, but the code above just does not
work when an optgroup is present. The messagebox shows the contents of
the entire optgroup.

I actually resolved the problem as follows:

HtmlElement element = webBrowser1.Document.GetElementById("Select1")
string selectedValue = element.GetAttribute("value");
string elementSource = element.OuterHtml;

And then running regex
(?<=<OPTION value={0} selected>).*?(?=</OPTION>)
against the elementSource.

It's hacky but it works. If you have the code that works for an
optgroup, that would be great.

Regards

 

[Walter Wang [MSFT]]

Hi Frank,

Thanks for your update and sorry for my ignorance of the OPTGROUP element.

Please try following code, hopefully it should work for situations with or
without OPTGROUP:

HtmlElement element = webBrowser1.Document.GetElementById("Select1");
foreach(HtmlElement child in element.All)
{
if (child.GetAttribute("tagName") == "OPTION")
{
if (child.GetAttribute("selected") == "True")
{
MessageBox.Show(child.GetAttribute("text"));
break;
}
}
}


Regards,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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[Walter Wang [MSFT]]

Hi Frank,

I'm wondering if you have tried the above suggestion. Anyway, please feel
free to let me know if there's anything unclear. Thanks.

Regards,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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that others may learn and benefit from your issue.
==================================================

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[Frank Rizzo]

Hi Frank,

I'm wondering if you have tried the above suggestion. Anyway, please feel
free to let me know if there's anything unclear. Thanks.

Walter, the code has shipped to customers using my Regex solution, but
I'll give your solution a try.

Regards