Question

我正在尝试从网站下载图片，但它给了我错误，即（远程服务器返回错误：（502）Bad Gateway）。我在互联网上搜索了很多，但没有得到确切的解决方案。此代码正在某些网站上运行，但在少数网站上显示上述错误。请检查下面的代码......

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim filename As String = Application.StartupPath
    If Not filename.EndsWith("\") Then filename &= "\"
    txtLocalFile.Text = "D:\a.jpg" 'filename & " "
    txtRemoteFile.Text = "http://bseworld.bseindia.com/eventgallery/cricket2015/19Feb2015/2.jpg"
End Sub


Private Sub btnDownload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDownload.Click
    Application.DoEvents()
    Try
        Dim web_client As WebClient = New WebClient

        Dim wp = New WebProxy("proxy ip", proxy_port)
        wp.Credentials = New NetworkCredential("uname", "password", "domainname")
        web_client.Proxy = wp
        web_client.DownloadFile(txtRemoteFile.Text, txtLocalFile.Text)

        MessageBox.Show("Done")
    Catch ex As Exception

    End Try

    End Sub

您能否告诉我哪部分代码丢失或者我必须更改..

Answer 1

我做了一些RND，最后我的代码正在运行。

CommandError: need exactly two arguments for username and password

“从URL下载图像文件时，远程服务器返回错误（502）Bad Gateway”

1 个答案: