vb.net网页源代码 vbnet web

vb.net中如何利用api函数获取网页源代码???

Dim MyClient As WebClient = New WebClient

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Dim MyReader As New System.IO.StreamReader(MyClient.OpenRead(url), System.Text.Encoding.Default) '定义新的文件流并读取网页文件数据,url表示需要打开的网页地址

Dim longTxt As String = MyReader.ReadToEnd 'longtxt存储了网页的源码

MyReader.Close()

求vb.net的源代码,最好说明其解决问题,越多越好,满意加50分。

下面这段代码,是我用来计算每个月存500元进银行,连续30年,最后连本带利能有多少钱。这里面涉及复利计算。界面中右边的文本框用来输出每一次计算的结果。

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

  Dim nianxian As Integer '年限变量

  Dim dingcun As Integer '定存变量

  Dim fuli_big As Long '大复利

  Dim fuli_small As Long '小复利

  Dim i As Integer '循环变量

  Dim DATAstring As String '数据字符串

  nianxian = Val(年限_TextBox.Text)

  dingcun = Val(定存_TextBox.Text)

  DATAstring = ""

  For i = 1 To nianxian

      fuli_small = dingcun * (1 + 0.1875)

      dingcun = fuli_small

      fuli_big = fuli_big + fuli_small

      DATAstring = DATAstring + "[" + Trim(Str(i)) + "]" + Str(fuli_big) + Chr(13) + Chr(10)

      'DATAstring = DATAstring + "[" + Trim(Str(i)) + "]" + Str(fuli_small) + Chr(13) + Chr(10)

  Next

  'fuli_big = fuli_small

  TextBox1.Text = DATAstring

  结果_TextBox.Text = Str(fuli_big) + "元"

End Sub

如何用vb.net获得网页的源代码

Dim url As String=" 网址"

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 ' 获取或设置一个值,该值指示是否与

Internet资源建立持久连接。

Dim reader As StreamReader = _

New StreamReader(httpResp.GetResponseStream,

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

Dim respHTML As String = reader.ReadToEnd() 'respHTML就是网页源代码

如何用vb.net获取网页源代码

使用webbrowser控件来加载网页,然后再

Private

Sub

WebBrowser

1_DocumentCompleted下通过使用WebBrowser1.Document.Body.

InnerHtml

来获取网页的源代码,或使用

WebBrowser1.Document.Body.InnerText来获取网页中的文本。之后可以通过字符串控制指令或者

正则表达式

来精确获取到你所需的数据。

如何使用vb.net来解析网页源代码,最终获取所需数据

使用webbrowser控件来加载网页,然后再 Private Sub WebBrowser1_DocumentCompleted下通过使用WebBrowser1.Document.Body.InnerHtml 来获取网页的源代码,或使用 WebBrowser1.Document.Body.InnerText来获取网页中的文本。之后可以通过字符串控制指令或者正则表达式来精确获取到你所需的数据。

VB怎么获取网页源码

1)使用MICROSOFT INTERNET TRANSFER CONTROL的,代码如下:

Dim strhtml As String

Dim STRURL As String

STRURL=""

strhtml = Inet1.OpenURL(STRURL)

2)用System.Net命空间下的HttpWebRequest来取得,代码如下:

Dim url As String=" " ' 网址

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 ' 获取或设置一个值,该值指示是否与 Internet资源建立持久连接。

Dim reader As StreamReader = _

New StreamReader(httpResp.GetResponseStream,

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

Dim respHTML As String = reader.ReadToEnd() 'respHTML就是网页源代码.


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