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vb.net数据库源代码 vb自带数据库

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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vb.net数据库源代码，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vb.net数据库源代码，然后再
Private
Sub
WebBrowser
1_DocumentCompleted下通过使用WebBrowser1.Document.Body.
InnerHtml
来获取网页vb.net数据库源代码的源代码，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 。
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
使用VB.net实现sql数据库的备份与恢复代码 Private Sub Button _Click(ByVal sender As System Object ByVal e As System EventArgs) Handles Button Click 备份数据库 BACKUP DATABASE Test TO DISK= C:\Backup WITH Format Dim cn As SqlConnection Dim cm As SqlCommand cn = getDB() cm = New SqlCommand( BACKUP DATABASE JXbase TO DISK= C:\Backup WITH Format cn) cn Open() cm ExecuteNonQuery() MsgBox( 备份成功 ) cn Close()
End Sub
恢复 Private Sub Button _Click(ByVal sender As System Object ByVal e As System EventArgs) Handles Button Click Dim cn As New SqlConnection Dim cn As New SqlConnection Dim mydr As SqlDataReader Dim str As String
Dim tmpConnectionString As String = Data Source=JJK;Initial Catalog=master;Integrated Security=True cn ConnectionString = tmpConnectionString cn ConnectionString = tmpConnectionString cn Open() cn Open() Dim cm As SqlCommand = New SqlCommand( select spid from master sysprocesses where dbid=db_id( JXbase ) cn) mydr = cm ExecuteReader()
Dim cm As SqlCommand = New SqlCommand() cm Connection = cn
While (mydr Read()) 杀死进程
str = killmydr( spid ) ToString() cm CommandText = str cm CommandType = CommandType Text Application DoEvents() cm ExecuteNonQuery() 杀进程 End While mydr Close() cm = New SqlCommand( RESTORE DATABASE JXbase FROM DISK= C:\Backup cn) 恢复备份 cm ExecuteNonQuery() MsgBox( 恢复成功成功 ) cn Close() cn Close()
lishixinzhi/Article/program/net/201311/12901
【vb.net数据库源代码 vb自带数据库】vb.net数据库源代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于vb自带数据库、vb.net数据库源代码的信息别忘了在本站进行查找喔 。

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