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このコードは以前はうまく動作していましたが、昨日からエラーが表示され始めました。 CookieContainerを追加するので、私の問題はクッキーに関するものだが、多くの同様のディスケットを読んだが、同じエラーが出る。 私のコードは私がウェブサイトから写真や彼らのタイトルを取得し、それらを表示することができ、ここに私のコードは次のとおりです。
フォーム1：
Vb.net webclientエラー：多すぎる自動リダイレクトが試みられました
Private Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click
Dim websiteURL1 As String = "http://www.gamestop.com/collection/upcoming-video-games"
Class1.getPics(websiteURL1, "<img src=""(?<Data>[^>]*)""><p>(?<Dataa>[^>]*)<br>")
Me.AutoScroll = True
End Sub
のClass1 fucntion：
Public Shared Function getPics(website As String, pattern As String)
Dim tempTitles As New List(Of String)()
Dim tempTitles2 As New List(Of String)()
Dim lestitres As New List(Of titlesclass)
Dim webClient As New CookieAwareWebClient()
webClient.Headers.Add("user-agent", "null")
'If the website happens to go offline, at least your application wont crash.
'Handle default proxy
Dim proxy As IWebProxy = WebRequest.GetSystemWebProxy()
proxy.Credentials = CredentialCache.DefaultCredentials
webClient.Proxy = proxy
Dim content As String = webClient.DownloadString(website)
Dim query = From title In Regex.Matches(content, pattern).Cast(Of Match)
Select New With {Key .Link = String.Concat("http://www.gamestop.com", title.Groups("Data").Value),
Key .Title = title.Groups("Dataa").Value}
Dim titles = tempTitles.Distinct().ToArray() 'remove duplicate titles
Dim titles2 = lestitres.Distinct().ToArray()
lestitres.Clear()
'Count Items
Dim item As Integer = 0
'Count Row
Dim row As Integer = 0
'image: 222*122
For Each letitre In query.Distinct
Dim ImageInBytes() As Byte = webClient.DownloadData(letitre.Link)
Dim ImageStream As New IO.MemoryStream(ImageInBytes)
Dim MyPic As New PictureBox
Dim MyLab As New Label
'x = numéro item fois largeur image
'y = numéro de ligne fois hauteur image
MyPic.Location = New Point(item * 222, row * 122)
MyLab.Location = New Point(item * 222, row * 122)
MyPic.SizeMode = PictureBoxSizeMode.AutoSize
MyLab.Text = letitre.Title
MyPic.Image = New System.Drawing.Bitmap(ImageStream)
Form2.Controls.Add(MyPic)
Form2.Controls.Add(MyLab)
'Bring Labels to front
For Each ctrl As Control In Form2.Controls
'If the control is of type button
If TypeOf ctrl Is Label Then
'Then disable it
ctrl.BringToFront()
End If
Next
'Increment the item count
item = item + 1
'If item is multiple of 4 or could check 4 then
If item Mod 4 = 0 Then
'Reset counter
item = 0
'Increment Row
row = row + 1
End If
Next
End Function
CookieContainerのWebClientクラス：
Imports System.Net
Imports System.Text.RegularExpressions
Public Class CookieAwareWebClient
Inherits WebClient
Private cc As New CookieContainer()
Private lastPage As String
Protected Overrides Function GetWebRequest(ByVal address As System.Uri) As System.Net.WebRequest
Dim R = MyBase.GetWebRequest(address)
If TypeOf R Is HttpWebRequest Then
With DirectCast(R, HttpWebRequest)
.CookieContainer = cc
If Not lastPage Is Nothing Then
.Referer = lastPage
End If
End With
End If
lastPage = address.ToString()
Return R
End Function
End Class