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[VB.NET] NullReferenceException
Discussion on [VB.NET] NullReferenceException within the .NET Languages forum part of the Coders Den category.
11/30/2013, 21:34
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#1
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[VB.NET] NullReferenceException
Hallo,
Ich möchte eine Login für mein Ip Board machen.
Jedoch kommt dieser Fehler :
Was muss ich hier machen ?
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11/30/2013, 22:03
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#2
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Nicht wirklich viel mit dem Webbrowser element gearbeitet, aber wenn du ein Element mit der ID "submit" ansprichst, solltest du vielleicht vorher schauen, ob es denn ein Element mit der ID "submit" auch gibt ..
btw. webrequests wären hier angebracht
btw.² was wird denn das mit dem Timer1_Tick da unten?
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11/30/2013, 22:03
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#3
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nullreferenceexception = das wodrauf du zugreifen willst gibts nicht
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11/30/2013, 22:19
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#4
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Quote:
Originally Posted by tolio
nullreferenceexception = das wodrauf du zugreifen willst gibts nicht
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"Submit" ist doch richtig.
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11/30/2013, 22:59
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#5
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Nein es gibt kein Element mit der ID "submit"
versuch stattdessen mal
Code:
Dim htmlElements As HtmlElementCollection = WebBrowser1.Document.All
For Each element As HtmlElement In htmlElements
If element.GetAttribute("value") = "Sign In" Then
element.InvokeMember("click")
End If
Next
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12/01/2013, 14:32
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#6
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Quote:
Originally Posted by hero9910
Nein es gibt kein Element mit der ID "submit"
versuch stattdessen mal
Code:
Dim htmlElements As HtmlElementCollection = WebBrowser1.Document.All
For Each element As HtmlElement In htmlElements
If element.GetAttribute("value") = "Sign In" Then
element.InvokeMember("click")
End If
Next
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Danke, Login geht jetzt.
Habe nur noch eine Frage.
Wie ist hier falsch ?
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12/01/2013, 14:37
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#7
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Steht doch in der Fehlerbeschreibung. Wie willst du was mit ner If abfragen, was keinen Wert hat?
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12/01/2013, 18:59
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#8
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Navigate ist eine Sub-Methode und hat somit keinen Rückgabewert.
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12/04/2013, 22:35
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#9
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Regel das doch mit If Webbrowser1.Url = "http://bla.de"
Kannste ja schlecht eine Anweisung fragen, was gerade los ist, obwohl sie nichts macht!
Best regarda
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12/05/2013, 11:44
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#10
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Danke,aber habe es schon seit tagen.
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