如何用vb點(diǎn)虐 獲得網(wǎng)頁的源代碼

Dim url As String=" 網(wǎng)址"

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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)頁源代碼

怎樣在vb中自動(dòng)檢測(cè)到可用串口號(hào)的具體程序代碼

vb點(diǎn)虐 的話

For

Each

sp

As

String

In

My.Computer.Ports.SerialPortNames

cbxport.Items.Add(sp)

Next

vb6.0的話要調(diào)用API查看串口相關(guān)信息存在的注冊(cè)表。

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM

通過讀注冊(cè)表的方法獲得串口數(shù)量，當(dāng)然也可以獲得串口號(hào)了。

Option

Explicit

Private

Declare

Function

RegOpenKey

Lib

"advapi32.dll

"

Alias

"RegOpenKeyA

"

(ByVal

hKey

As

Long,

ByVal

lpSubKey

As

String,

phkResult

As

Long)

As

Long

Private

Declare

Function

RegQueryInfoKey

Lib

"advapi32.dll

"

Alias

"RegQueryInfoKeyA

"

(ByVal

hKey

As

Long,

ByVal

lpClass

As

String,

lpcbClass

As

Long,

ByVal

lpReserved

As

Long,

lpcSubKeys

As

Long,

lpcbMaxSubKeyLen

As

Long,

lpcbMaxClassLen

As

Long,

lpcValues

As

Long,

lpcbMaxValueNameLen

As

Long,

lpcbMaxValueLen

As

Long,

lpcbSecurityDescriptor

As

Long,

lpftLastWriteTime

As

Long)

As

Long

Private

Const

HKEY_LOCAL_MACHINE

=

H80000002

'

獲得當(dāng)前系統(tǒng)的

COM

口的數(shù)量

Function

GetCOMCount()

As

Integer

Dim

ret

As

Long,

cntCOM

As

Long

RegOpenKey

HKEY_LOCAL_MACHINE,

"HARDWARE\DEVICEMAP\SERIALCOMM

",

ret

RegQueryInfoKey

ret,

"

",

0,

0,

0,

0,

0,

cntCOM,

0,

0,

0,

GetCOMCount

=

cntCOM

End

Function

Private

Sub

Command1_Click()

MsgBox

"您的機(jī)器有

"

GetCOMCount

"

個(gè)串口。

",

vbOKOnly,

"串口數(shù)量

"

End

Sub

求vb點(diǎn)虐 的源代碼，最好說明其解決問題，越多越好，滿意加50分。

下面這段代碼，是我用來計(jì)算每個(gè)月存500元進(jìn)銀行，連續(xù)30年，最后連本帶利能有多少錢。這里面涉及復(fù)利計(jì)算。界面中右邊的文本框用來輸出每一次計(jì)算的結(jié)果。

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

? Dim nianxian As Integer '年限變量

? Dim dingcun As Integer '定存變量

? Dim fuli_big As Long '大復(fù)利

? Dim fuli_small As Long '小復(fù)利

? Dim i As Integer '循環(huán)變量

? Dim DATAstring As String '數(shù)據(jù)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

? 結(jié)果_TextBox.Text = Str(fuli_big) + "元"

End Sub

網(wǎng)頁名稱：vb點(diǎn)虐 串口源帶碼 vbnet串口控件
當(dāng)前地址：http://chinadenli.net/article24/ddeipje.html

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