Webbrowser code help

Primeval · Feb 16, 2013

Yoo,

Is there any way to get this working?

Code:

WebBrowser1.Navigate
        While Not WebBrowser1.ReadyState = WebBrowserReadyState.Complete
            Application.DoEvents()
        End While
        WebBrowser1.Document.GetElementById("drug_2").SetAttribute("value", 400)
        WebBrowser1.Document.GetElementById("sell").InvokeMember("click")
WebBrowser1.Document.GetElementById("drug_6").SetAttribute("value", 400)
            WebBrowser1.Document.GetElementById("buy").InvokeMember("click")

It skips the last 2 lines.. Is there any problem with the code?

BUMP, Any solution for this code? Really need it..

xuanhung123 · Feb 16, 2013

The proper way would be to handle the DocumentCompleted event instead of looping for the proper state

cgimaster · Feb 16, 2013

Rather then waiting for the document complete, its easier if you search for a key text that will be present from page to page, the document completed is an unreliable func.

For example, while WebBrowser1.Document.GetElementById("drug_2") is null wait until its not.

Primeval · Feb 16, 2013

Anything else?

g4m3r · Feb 23, 2013

After

Code:

[COLOR=#FFFFCC]WebBrowser1.Document.GetElementById("sell").InvokeMember("click")[/COLOR]

a new webpage will load or? Then you need to wait till the document is complete.
If the webpage is loaded you can set the value.

Code:

[COLOR=#FFFFCC]WebBrowser1.Document.GetElementById("drug_6").SetAttribute("value", 400)
[/COLOR][COLOR=#FFFFCC]            WebBrowser1.Document.GetElementById("buy").InvokeMember("click")[/COLOR]

This should work for you, if not please PM me

.

Code:

 Public Sub WaitForPageLoad()
        AddHandler [COLOR=#FFFFCC]WebBrowser1[/COLOR].DocumentCompleted, New WebBrowserDocumentCompletedEventHandler(AddressOf PageWaiter)
        While Not pageready
            Application.DoEvents()
        End While
        pageready = False
    End Sub
    Private Sub PageWaiter(ByVal sender As Object, ByVal e As WebBrowserDocumentCompletedEventArgs)
        If [COLOR=#FFFFCC]WebBrowser1[/COLOR].ReadyState = WebBrowserReadyState.Complete Then
            pageready = True
            RemoveHandler [COLOR=#FFFFCC]WebBrowser1[/COLOR].DocumentCompleted, New WebBrowserDocumentCompletedEventHandler(AddressOf PageWaiter)
        End If
    End Sub

WebBrowser1.Document.GetElementById("drug_2").SetAttribute("value", 400)
WebBrowser1.Document.GetElementById("sell").InvokeMember("click")
WaitForPageLoad()
WebBrowser1.Document.GetElementById("drug_6").SetAttribute("value", 400)
WebBrowser1.Document.GetElementById("buy").InvokeMember("click")
WaitForPageLoad()

terebi · Mar 4, 2013

WebBrowser1.Document.GetElementById("sell").InvokeMember("click") -- > Problem is that "click" is not synchronous call.

If "drug_6" only appears after you click the "sell" button, then its possible the script is calling faster than the page can refresh itself.

WebBrowser1.Document.GetElementById("drug_6").SetAttribute("value", 400) --> drug_6 doesn't exist so nothing happens WebBrowser1.Document.GetElementById("buy").InvokeMember("click")

So you need to wait for "drug_6" != null (if its ajax, the page will still be complete, so waiting for READY_STATE won't work)

Webbrowser code help

Primeval

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xuanhung123

Newbie

cgimaster

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Primeval

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g4m3r

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terebi

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