本文介绍了webbrowser的文件下载器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
你好
我已经制作了一个内置下载器的网络（套件）浏览器，但当我试图下载像这样的文件时： br />
www.some-url.com/download.php?file=some_filenam.txt它没有下载文件但下载了页面download.php并保存它作为some_filename.txt
我该如何解决这个问题
代码我用来下载：
Hello
I''ve made a web(kit) browser with a build in downloader, but when i''m trying to download files like:
www.some-url.com/download.php?file=some_filenam.txt it doesn''t download the file but it downloads the page download.php and saves it as some_filename.txt
how can i fix this problem
code im using to download:
webClient1.DownloadFileAsync(New Uri("www.some-url.com/download.php?file=some_filenam.txt"), Environment.GetFolderPath(Environment.SpecialFolder.Desktop) & "/some_filename.txt")
Bart de Lange
Bart de Lange
推荐答案
Imports System.Net
Public Class downloader
Public whereToSave As String
Public dir As String
Delegate Sub ChangeTextsSafe(ByVal length As Long, ByVal position As Integer, ByVal percent As Integer, ByVal speed As Double)
Delegate Sub DownloadCompleteSafe(ByVal cancelled As Boolean)
Public Sub DownloadComplete(ByVal cancelled As Boolean)
Me.txtFileName.Enabled = True
Me.btnDownload.Enabled = True
Me.btnCancel.Enabled = False
If cancelled Then
Me.Label4.Text = Main_Win.rm.GetString("Downloader_Label4_1")
Else
Me.Label4.Text = Main_Win.rm.GetString("Downloader_Label4_2")
End If
Me.ProgressBar1.Value = 0
'for localization purpose -V-
Me.Label5.Text = Main_Win.rm.GetString("Downloader_Label5") + " "
Me.Label6.Text = Main_Win.rm.GetString("Downloader_Label6") + " "
Me.Label3.Text = Main_Win.rm.GetString("Downloader_Label3") + " "
Me.Label2.Text = Main_Win.rm.GetString("Downloader_Label2") + " "
Me.Label4.Text = ""
End Sub
Public Sub ChangeTexts(ByVal length As Long, ByVal position As Integer, ByVal percent As Integer, ByVal speed As Double)
Me.Label3.Text = Main_Win.rm.GetString("Downloader_Label3") + " " & Math.Round((length / 1024), 2) & " KB"
Me.Label5.Text = Main_Win.rm.GetString("Downloader_Label5") + " " & Me.txtFileName.Text
Me.Label4.Text = Main_Win.rm.GetString("Downloader_Label4_3") + " " & Math.Round((position / 1024), 2) & " KB " + Main_Win.rm.GetString("Downloader_Label4_4") + " " & Math.Round((length / 1024), 2) & "KB (" & Me.ProgressBar1.Value & "%)"
If speed = -1 Then
Me.Label2.Text = Main_Win.rm.GetString("Downloader_Label2_2")
Else
Me.Label2.Text = Main_Win.rm.GetString("Downloader_Label2") + " " & Math.Round((speed / 1024), 2) & " KB/s"
End If
Me.ProgressBar1.Value = percent
If percent = 100 Then
Me.Close()
End If
End Sub
Private Sub btnDownload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDownload.Click
If Me.txtFileName.Text <> "" Then
Me.SaveFileDialog1.InitialDirectory = dir
Me.SaveFileDialog1.FileName = whereToSave
If Me.SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
Me.whereToSave = Me.SaveFileDialog1.FileName
Me.SaveFileDialog1.FileName = ""
Me.Label6.Text = Main_Win.rm.GetString("Downloader_Label6") + " " & Me.whereToSave
Me.txtFileName.Enabled = False
Me.btnDownload.Enabled = False
Me.btnCancel.Enabled = True
Me.BackgroundWorker1.RunWorkerAsync()
End If
Else
MessageBox.Show(Main_Win.rm.GetString("Downloader_msgbox1"), Main_Win.rm.GetString("Downloader_msgbox1_1"), MessageBoxButtons.OK, MessageBoxIcon.Warning)
End If
End Sub
Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
Dim theResponse As HttpWebResponse
Dim theRequest As HttpWebRequest
Try
theRequest = WebRequest.Create(Me.txtFileName.Text)
theResponse = theRequest.GetResponse
Catch ex As Exception
MessageBox.Show(Main_Win.rm.GetString("Downloader_msgbox2") & ControlChars.CrLf & _
Main_Win.rm.GetString("Downloader_msgbox2_2") & ControlChars.CrLf & _
Main_Win.rm.GetString("Downloader_msgbox2_3"), Main_Win.rm.GetString("Downloader_msgbox2_4"), MessageBoxButtons.OK, MessageBoxIcon.Error)
Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete)
Me.Invoke(cancelDelegate, True)
Exit Sub
End Try
Dim length As Long = theResponse.ContentLength
Dim safedelegate As New ChangeTextsSafe(AddressOf ChangeTexts)
Me.Invoke(safedelegate, length, 0, 0, 0)
Dim writeStream As New IO.FileStream(Me.whereToSave, IO.FileMode.Create)
Dim nRead As Integer
Dim speedtimer As New Stopwatch
Dim currentspeed As Double = -1
Dim readings As Integer = 0
Do
If BackgroundWorker1.CancellationPending Then
Exit Do
End If
speedtimer.Start()
Dim readBytes(4095) As Byte
Dim bytesread As Integer = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
nRead += bytesread
Dim percent As Short = (nRead * 100) / length
Me.Invoke(safedelegate, length, nRead, percent, currentspeed)
If bytesread = 0 Then Exit Do
writeStream.Write(readBytes, 0, bytesread)
speedtimer.Stop()
readings += 1
If readings >= 5 Then
currentspeed = 20480 / (speedtimer.ElapsedMilliseconds / 1000)
speedtimer.Reset()
readings = 0
End If
Loop
theResponse.GetResponseStream.Close()
writeStream.Close()
If Me.BackgroundWorker1.CancellationPending Then
IO.File.Delete(Me.whereToSave)
Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete)
Me.Invoke(cancelDelegate, True)
Exit Sub
End If
Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete)
Me.Invoke(completeDelegate, False)
End Sub
Private Sub Downloader_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Label1.Text = Main_Win.rm.GetString("Downloader_Label1")
Me.Label2.Text = Main_Win.rm.GetString("Downloader_Label2")
Me.Label3.Text = Main_Win.rm.GetString("Downloader_Label3")
Me.Label4.Text = Main_Win.rm.GetString("Downloader_Label4")
Me.Label5.Text = Main_Win.rm.GetString("Downloader_Label5")
Me.Label6.Text = Main_Win.rm.GetString("Downloader_Label6")
Me.btnDownload.Text = Main_Win.rm.GetString("Downloader_btnDownload")
Me.btnCancel.Text = Main_Win.rm.GetString("Downloader_btnCancel")
Me.Label4.Text = ""
Me.btnDownload.ForeColor = Color.Black
Me.btnCancel.ForeColor = Color.Black
End Sub
Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancel.Click
Me.BackgroundWorker1.CancelAsync()
End Sub
End Class
和thgis是主表单中的请求处理程序：
and thgis is the request handler in the main form:
Public Sub WebKitBrowser1_DownloadBegin(Sender As Object, e As WebKit.FileDownloadBeginEventArgs)
Dim time As DateTime = DateTime.Now
Dim format As String = "d/M/yyyy HH:mm"
Dim newItem As New ListViewItem(e.SuggestedFileName)
downloader.Show()
downloader.txtFileName.Text = e.Url.ToString
downloader.whereToSave = e.SuggestedFileName
downloader.dir = GetDownloadsPath()
newItem.SubItems.Add(e.Url.ToString)
'the e.url.tostring can be http://www.someurl.com/download.php?file.zip
'but also http://www.codeproject.com/.../someproject.zip but both don't work
newItem.SubItems.Add(time.ToString(format))
ListView1.Items.Add(newItem)
My.Settings.Downloads.Add(e.SuggestedFileName + "|" + e.Url.ToString + "|" + time.ToString(format))
My.Settings.Save()
End Sub
这是getdownloadpath函数（如果必要的话）
and this is the getdownloadpath function(if necessarily)
<DllImport("shell32.dll", CharSet:=CharSet.Auto)> _
Public Shared Function SHGetKnownFolderPath(ByRef id As Guid, flags As Integer, token As IntPtr, ByRef path As IntPtr) As Integer
End Function
Public Function GetDownloadsPath() As String
Dim path__1 As String = Nothing
If Environment.OSVersion.Version.Major >= 6 Then
Dim pathPtr As IntPtr
Dim hr As Integer = SHGetKnownFolderPath(FolderDownloads, 0, IntPtr.Zero, pathPtr)
If hr = 0 Then
path__1 = Marshal.PtrToStringUni(pathPtr)
Marshal.FreeCoTaskMem(pathPtr)
Return path__1
End If
End If
path__1 = Path.GetDirectoryName(Environment.GetFolderPath(Environment.SpecialFolder.Personal))
path__1 = Path.Combine(path__1, "Downloads")
Return path__1
End Function
这篇关于webbrowser的文件下载器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！