Vb.net Net验证码等待用户输入
我正在尝试将验证码图像复制并显示在图片盒中 我目前正在使用以下代码查找相关ID,因为在刷新页面时它会不断更改:Vb.net Net验证码等待用户输入,vb.net,webbrowser-control,captcha,Vb.net,Webbrowser Control,Captcha,我正在尝试将验证码图像复制并显示在图片盒中 我目前正在使用以下代码查找相关ID,因为在刷新页面时它会不断更改: Dim htmlDocument As HtmlDocument = Me.IEMC.Document Dim htmlElementCollection As HtmlElementCollection = htmlDocument.Images For Each htmlElement As HtmlElemen
Dim htmlDocument As HtmlDocument = Me.IEMC.Document
Dim htmlElementCollection As HtmlElementCollection = htmlDocument.Images
For Each htmlElement As HtmlElement In htmlElementCollection
Dim imgUrl As String = htmlElement.GetAttribute("id")
If imgUrl.Contains("wlspispHIPBimg") Then
GRABMYDARNIMG!
End If
Next
这很有效。我可以让它找到正确的ID。但是我将如何复制此ID的图像内容,并将其粘贴到我的picturebox中
我尝试了以下几点:
IEMC.Document.GetElementById(imgUrl).Focus()
IEMC.Document.ExecCommand("Copy", False, Nothing)
但似乎无法将其粘贴到任何地方,或者不确定如何正确复制元素
我也尝试过这样的事情:
Dim O As Object
Set O = WebBrowser1.Document.body.createControlRange()
Call O.Add(WebBrowser1.Document.All("imgcode"))
Call O.execCommand("Copy")
Set Picture1.Picture = Clipboard.GetData
但这在VB.NET中不起作用。我不知道下一步该试什么
将图像粘贴到picturebox似乎很容易,假设它被复制到剪贴板上。我只使用这行代码:
PictureBox1.Image = Clipboard.GetImage
如果有人知道如何做到这一点,我将非常感激
注意:无法从URL下载图像。它必须来自webbrowser中已加载的元素。一旦验证码图像加载一次,图像url就会被删除
编辑:尝试以下建议。。但无论如何,我都无法用它来保存任何img
Dim doc As mshtml.IHTMLDocument = DirectCast(IEMC.Document.DomDocument, mshtml.IHTMLDocument)
Dim imgRange As mshtml.IHTMLControlRange = DirectCast(DirectCast(doc.body, mshtml.HTMLBody).createControlRange(), mshtml.IHTMLControlRange)
Dim imagename As String = String.Empty
Try
For Each img As mshtml.IHTMLImgElement In doc.images
imgRange.add(DirectCast(img, mshtml.IHTMLControlElement))
imgRange.Select()
imgRange.execCommand("Copy", False, Nothing)
Using bmp As Bitmap = DirectCast(Clipboard.GetDataObject().GetData(DataFormats.Bitmap), Bitmap)
bmp.Save("C:\captchaPic.jpg")
End Using
imagename = img.nameProp
Exit For
Next
Catch aaa As System.Exception
End Try
我做了类似的事情,将CaptchaImage保存到磁盘,然后将其发送到decaptchaapi。这是我的代码,它是c语言的,但您可以轻松转换: 所以保存到磁盘,并使用它将其放入图片框
IHTMLDocument2 doc = (IHTMLDocument2)webBrowser1.Document.DomDocument;
IHTMLControlRange imgRange = (IHTMLControlRange)((HTMLBody)doc.body).createControlRange();
string imagename = string.Empty;
try
{
foreach (IHTMLImgElement img in doc.images)
{
imgRange.add((IHTMLControlElement)img);
imgRange.execCommand("Copy", false, null);
using (Bitmap bmp = (Bitmap)Clipboard.GetDataObject().GetData(DataFormats.Bitmap))
{
bmp.Save(@"captchaimages\captchaPic.jpg");
}
imagename = img.nameProp;
break;
}
}
catch (System.Exception aaa)
{
}
隐马尔可夫模型。。我不太清楚如何正确地转换这个。。我使用了一个代码转换器,但我似乎无法让它工作。特别是imgRange.add和imgRange.execCommand以及doc.body.Spoke太早。让它运行,但它实际上从来没有保存任何东西。好像它实际上找不到图像。花了一点功夫(我也把它搁置了一段时间),但还是用上面的方法找到了它。谢谢@Gematria,很高兴我帮了你
For Each capimg As HtmlElement In WebBrowser6.Document.Images
If capimg.GetAttribute("src").Contains("papi/media?") Then
Dim CD As mshtml.IHTMLDocument2 = CType(WebBrowser6.Document.DomDocument, Global.mshtml.IHTMLDocument2)
Dim Images As mshtml.IHTMLControlRange = CType(CType(CD.body, mshtml.HTMLBody).createControlRange, Global.mshtml.IHTMLControlRange)
For Each imgs As mshtml.IHTMLImgElement In CD.images
If imgs.GetAttribute("src").ToString.Contains("papi/media?") Then
Images.add(CType(imgs, Global.mshtml.IHTMLControlElement))
Images.execCommand("Copy", False, Nothing)
Dim captchaimage As Image
captchaimage = CType(Clipboard.GetDataObject.GetData(DataFormats.Bitmap), Image)
PictureBox1.Image = captchaimage
End If
Next
End If
Next