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vb.net解析url vb解析xml

求VB.NET讀取網(wǎng)頁內(nèi)容寫法

Imports System.Net

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Imports System.IO

Imports System.Text.RegularExpressions

Public Class Form1

Private Sub button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

Dim stream As IO.Stream = WebRequest.Create(UrlAdress).GetResponse().GetResponseStream()

'注意urladress為你上面的網(wǎng)頁地址。

Dim sr As StreamReader = New StreamReader(stream, System.Text.Encoding.UTF8)

Label1.Text = Regex.Match(sr.ReadToEnd, "回答采納率").ToString

'sr。readtoend讀取網(wǎng)頁流到末尾,即使用正則表達式從網(wǎng)頁流中提取“回答采納率”,賦值給Label1.Text ‘沒有則為空

sr.Dispose() '關(guān)閉流

End Sub'要提取什么東西用正則表達式最好

End Class

急急急?。?!請問如何在VB.NET中通過URL傳參和在新的頁面接收參數(shù)的值呢【W(wǎng)eb網(wǎng)站】

在發(fā)送頁面用get:如點擊button時response.redirect("接收頁的url"?canshu=textbox.text)

;

然后在接收頁面用Request.QueryString["canshu"].toString(); 這樣就接受到textbox里的值了。

vb.net 如何指定訪問來路來訪問一個URL?

'GET數(shù)據(jù)通用模板,返回源碼

Function DownBitmap(ByVal URL_Post As String, ByVal Referer_Post As String, ByVal Accept_Post As String, ByVal UserAgent_Post As String _

, ByVal KeepAlive_Post As Boolean, ByVal CookieContainer_Post As CookieContainer) As Bitmap

Dim HttpPostUrl As New System.Uri(URL_Post)

Dim reqp As HttpWebRequest

reqp = CType(WebRequest.Create(HttpPostUrl), HttpWebRequest)

reqp.Method = "GET"

reqp.Referer = Referer_Post

reqp.Accept = Accept_Post

reqp.UserAgent = UserAgent_Post

reqp.KeepAlive = KeepAlive_Post

reqp.CookieContainer = CookieContainer_Post '設(shè)置Cookie

Dim resP As WebResponse = reqp.GetResponse

Dim bmp As Bitmap = New Bitmap(resP.GetResponseStream)

resP.Close() '關(guān)閉

Return bmp

End Function

如何用vb.net獲得網(wǎng)頁的源代碼

Dim url As String=" 網(wǎng)址"

Dim httpReq As System.Net.HttpWebRequest

Dim httpResp As System.Net.HttpWebResponse

Dim httpURL As New System.Uri(url)

httpReq = CType(WebRequest.Create(httpURL), HttpWebRequest)

httpReq.Method = "GET"

httpResp = CType(httpReq.GetResponse(), HttpWebResponse)

httpReq.KeepAlive = False ' 獲取或設(shè)置一個值,該值指示是否與

Internet資源建立持久連接。

Dim reader As StreamReader = _

New StreamReader(httpResp.GetResponseStream,

System.Text.Encoding.GetEncoding(-0))

Dim respHTML As String = reader.ReadToEnd() 'respHTML就是網(wǎng)頁源代碼

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