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vb.net源碼高拍儀的簡(jiǎn)單介紹

如何用vb.net獲取網(wǎng)頁(yè)源代碼

使用webbrowser控件來(lái)加載網(wǎng)頁(yè),然后再

創(chuàng)新互聯(lián)公司長(zhǎng)期為成百上千家客戶(hù)提供的網(wǎng)站建設(shè)服務(wù),團(tuán)隊(duì)從業(yè)經(jīng)驗(yàn)10年,關(guān)注不同地域、不同群體,并針對(duì)不同對(duì)象提供差異化的產(chǎn)品和服務(wù);打造開(kāi)放共贏平臺(tái),與合作伙伴共同營(yíng)造健康的互聯(lián)網(wǎng)生態(tài)環(huán)境。為南湖企業(yè)提供專(zhuān)業(yè)的網(wǎng)站設(shè)計(jì)制作、網(wǎng)站設(shè)計(jì),南湖網(wǎng)站改版等技術(shù)服務(wù)。擁有十余年豐富建站經(jīng)驗(yàn)和眾多成功案例,為您定制開(kāi)發(fā)。

Private

Sub

WebBrowser

1_DocumentCompleted下通過(guò)使用WebBrowser1.Document.Body.

InnerHtml

來(lái)獲取網(wǎng)頁(yè)的源代碼,或使用

WebBrowser1.Document.Body.InnerText來(lái)獲取網(wǎng)頁(yè)中的文本。之后可以通過(guò)字符串控制指令或者

正則表達(dá)式

來(lái)精確獲取到你所需的數(shù)據(jù)。

VB.NET怎么編模擬袖珍計(jì)算器的完整程序?

Public C護(hù)激篙刻蕻灸戈熏恭抹lass Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim c As Char

c = Trim(TextBox3.Text)

Select Case c

Case "+"

TextBox4.Text = Val(TextBox1.Text) + Val(TextBox2.Text)

Case "-"

TextBox4.Text = Val(TextBox1.Text) - Val(TextBox2.Text)

Case "*"

TextBox4.Text = Val(TextBox1.Text) * Val(TextBox2.Text)

Case "\"

If Val(TextBox2.Text) = 0 Then

MsgBox("分母為0")

Else

TextBox4.Text = Val(TextBox1.Text) \ Val(TextBox2.Text)

End If

Case "/"

If Val(TextBox2.Text) = 0 Then

MsgBox("分母為0")

Else

TextBox4.Text = Val(TextBox1.Text) / Val(TextBox2.Text)

End If

End Select

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

End

End Sub

End Class

如何用vb.net獲得網(wǎng)頁(yè)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(gè)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(yè)源代碼


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