VB.NET中標(biāo)準(zhǔn)的實(shí)體類怎么寫的,請教VB高手指導(dǎo)

'代碼來源：代碼街codejie點(diǎn)虐

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'由于在vb點(diǎn)虐 里變量名不區(qū)分大小寫（StuName和stuname是一樣的），所以個別變量名需要修改

'在vb點(diǎn)虐 中,模塊級變量的命名原則是以m_開頭

Public Class Student

Private m_stuNo As String '學(xué)生號字段

Private m_stuName As String '學(xué)生姓名字段

Private m_stuAge As Integer '學(xué)生年齡字段

Private m_stuAddress As String '學(xué)生住址字段

'無參構(gòu)造方法

Public Sub New()

End Sub

'有參構(gòu)造方法

Public Sub New(ByVal stuNo As String, ByVal stuName As String, ByVal stuAge As Integer, ByVal stuAddress As String)

m_stuNo = stuNo

m_stuName = stuName

m_stuAge = stuAge

m_stuAddress = stuAddress

End Sub

'學(xué)生號屬性

Public Property StuNo() As String

Get

Return m_stuNo

End Get

Set(ByVal value As String)

m_stuNo = value

End Set

End Property

'學(xué)生姓名屬性

Public Property StuName() As String

Get

Return m_stuName

End Get

Set(ByVal value As String)

m_stuName = value

End Set

End Property

'學(xué)生年齡屬性

Public Property StuAge() As Integer

Get

Return m_stuAge

End Get

Set(ByVal value As Integer)

m_stuAge = value

End Set

End Property

'學(xué)生住址屬性

Public Property StuAddress() As String

Get

Return m_stuAddress

End Get

Set(ByVal value As String)

m_stuAddress = value

End Set

End Property

End Class

vb點(diǎn)虐 的數(shù)據(jù)庫連接

1·綁定數(shù)據(jù)源來進(jìn)行連接

2.用代碼連接

先到數(shù)據(jù)庫建立一個數(shù)據(jù)庫和相應(yīng)的表

連接數(shù)據(jù)庫的代碼：

Dim str As String = "Data Source=服務(wù)器名;Initial Catalog=數(shù)據(jù)庫名;Persist Security Info=True;User ID=;Password="

dim conn As SqlClient.SqlConnection

try

conn = New SqlClient.SqlConnection

conn.ConnectionString = str

conn.Open()

Return True

Catch ex As Exception

MsgBox(ex.ToString)

Return False

End Try

登錄代碼：Dim str As String = "Data Source=服務(wù)器名;Initial Catalog=數(shù)據(jù)庫名;Persist Security Info=True;User ID=;Password="

dim conn As SqlClient.SqlConnection

conn = New SqlClient.SqlConnection

conn.ConnectionString = str

conn.Open()

sqlstr = "Select * From Amd Where AmdName='" TextBox1.Text "' And AmdPwd = '" TextBox2.Text "'"

Dim sqlcmd As SqlClient.SqlCommand = New SqlClient.SqlCommand(sqlstr, conn)

Dim dr As SqlClient.SqlDataReader

dr = sqlcmd.ExecuteReader

If dr.Read = True Then '判斷一條記錄為真

kf.Show() '顯示下個窗體

Me.Hide() ’隱藏當(dāng)前窗體

Else

MessageBox.Show("輸入信息有誤！", "提示")

TextBox1.Text = ""

TextBox2.Text = ""

End If

vb點(diǎn)虐 怎樣創(chuàng)建控件數(shù)組？

Dim Str(20) As String '20數(shù)據(jù)元素

Dim Text(20) As TextBox

Dim n As Integer = 0

For Each i In Text

i = New TextBox '實(shí)例化

i.Location = New Point(50, n * 20)

Me.Controls.Add(i) '添加窗體

Dim Index As Integer = i.TabIndex '沒index屬性

Str(n) = Index

i.Text = Str(n) 'str數(shù)組值賦值給文本框

n += 1

Next

VB.NET和VB"運(yùn)行"時為什么VB.NET會比VB慢很多?

VB點(diǎn)虐 是解釋型的語言`~他不直接生成*.exe文件`~ 而vb是編譯和解釋都具備的語言他可以直接生成*.exe大部分它是采用編譯的~~~ 什么是解釋~~什么是編譯那? 解釋就好比是吃瓜子吃一個撥一個~~ 而編譯好比是吃瓜子全把它撥了在全吃~~ 所謂的吃瓜子就是也就是把語句變成機(jī)器能讀取的二進(jìn)制你說是全撥了在吃快哪??還是一個撥一個吃快哪??