如何编写VB.NET 接口程序

可以的，把项目的类型设成类库，将所有的函数用Public修饰附封装在类里面，生成dll文件。这样别人就可以在别人项目属性的引用页里面添加对你的dll文件的引用，然后导入命名空间，直接使用了。

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比如说，在一个项目里：

NameSpace Controller

Public Class ControlMachine

Public Sub Boot()

End Sub

Public Sub Shutdown()

End Sub

End Class

End NameSpace

进入另一个项目的项目属性，进入引用页，添加到那个dll文件的引用。在代码中：

Imports Controller '加在代码文档的最顶端

使用：

Dim controller As New ControlMachine

controller.Boot()

controller.Shutdown()

希望你能了解，不懂再追问

VB.NET编程语法

你这是vb.net的代码,vb中不允许那么写:

Dim

strdx()

As

String

=

{"0",

"0",

"0"}

'定义个数组,从后面的值能看的出最大下标是2,也就是strdx(0),strdx(1)和strdx(2),3个的默认值都为0

Dim

calcount1

As

String

=

"0"

'定义个字符串变量

Dim

calcount2

As

String

=

"0"

Dim

strvalue

As

Boolean

=

False

'定义strvalue为bool值,改类型变量只有true和false

2种值

If

strdx(0)

=

"0"

Then

TextBox1.Text

=

strdx(0)

"."

这是字符串连接符号,和"+"的区别是,他把左右2边的内容直接连接的,而"+"可能会编程运算符,例如

2

3

=

"23"

而

2

+

3

=

5

ElseIf

strvalue

=

False

Then

strdx(0)

=

strdx(0)

"0"

TextBox1.Text

=

strdx(0)

"."

strvalue

=

True

Else

strdx(0)

=

strdx(0)

"0"

TextBox1.Text

=

strdx(0)

Select

Case

calcount1

'

这里开始是分支语句

Case

"+"

TextBox1.Text

=

Str(Val(strdx(1))

+

Val(strdx(0)))

vb.net的编程

Option Strict Off

Option Explicit On

Friend Class Form1

Inherits System.Windows.Forms.Form

Private Sub Command1_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Command1.Click

Dim j As Integer

Dim A(9) As Short

Dim D(9) As Short

Dim i As Short

Dim B As Short

Dim C As Short

Dim F As Short

Dim G As Boolean

Dim H() As Short

Dim K As Short

Dim S As String

C = 32767

For i = 1 To 10

A(i - 1) = CShort(InputBox("输入第 " i "个数"))

If B A(i - 1) Then B = A(i - 1)

If C A(i - 1) Then C = A(i - 1)

D(i - 1) = Int(Rnd() * 100 + 0.5)

If F D(i - 1) Then F = D(i - 1)

Next i

For i = 2 To 100

For j = 2 To Int(System.Math.Sqrt(i) + 0.5)

'UPGRADE_WARNING: Couldn't resolve default property of object j. Click for more: 'ms-help://MS.VSExpressCC.v80/dv_commoner/local/redirect.htm?keyword="6A50421D-15FE-4896-8A1B-2EC21E9037B2"'

'UPGRADE_WARNING: Mod has a new behavior. Click for more: 'ms-help://MS.VSExpressCC.v80/dv_commoner/local/redirect.htm?keyword="9B7D5ADD-D8FE-4819-A36C-6DEDAF088CC7"'

If i Mod j 0 Then

G = True

Else

G = False

Exit For

End If

Next j

If G = True Then

ReDim Preserve H(K)

H(K) = i

K = K + 1

End If

Next i

S = "2;"

For i = 0 To K - 1

S = S H(i) ";"

Next i

MsgBox("最大数为：" B "；最小数为：" C)

MsgBox("最大的随机数为：" F)

MsgBox("1--100之间共有" K + 1 "个素数：" S)

End Sub

End Class

用VB.NET程序编写代码

Delphi代码如下：

procedure TForm1.Button1Click(Sender: TObject);

var

购物总价:Integer;

折扣:Extended;

begin

购物总价:=StrToInt(Edit1.Text);

if 购物总价250 then

begin

折扣:=0;

end

else if 购物总价500 then

begin

折扣:=0.05;

end

else if 购物总价1000 then

begin

折扣:=0.075;

end

else if 购物总价2000 then

begin

折扣:=0.1;

end

{

此段的折扣是多少？

else if 购物总价3000 then

begin

折扣:=0.05;

end

}

else if 购物总价=3000 then

begin

折扣:=0.15;

end;

ShowMessage('您享受的折扣是：'+FloatToStr(折扣)

+' 原价：'+IntToStr(购物总价)

+' 折后总价：'+FloatToStr(购物总价*(1-折扣)));

end;