vb.net三层设计 vb界面设计时会用到哪些类
用vb.net编写项目移动。。。求高人指点。。。。
窗体是指由两个列表框（ListBox1、ListBox2）和4个命令按钮（Button1“”按钮，Button2“”按钮，Button3“”按钮，Button4“”按钮）所构成的界面，代码：
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Public Class Form1
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Me.Text = "选项移动"
ListBox1.SelectionMode = SelectionMode.MultiSimple
ListBox2.SelectionMode = SelectionMode.One
For i = 1 To 10
ListBox1.Items.Add(Chr(Asc("a") + i - 1))
Next
For i = 1 To 10
ListBox2.Items.Add(i.ToString)
Next
End Sub
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
If ListBox1.SelectedItems Is Nothing Then Exit Sub
Dim b As ListBox.ObjectCollection
For i = 0 To Me.ListBox1.SelectedItems.Count - 1
Me.ListBox2.Items.Add(Me.ListBox1.SelectedItems(0))
Me.ListBox1.Items.RemoveAt(Me.ListBox1.SelectedIndices(0))
Next
End Sub
Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click
If ListBox2.SelectedItems IsNot Nothing Then
ListBox1.Items.Add(ListBox2.SelectedItem)
ListBox2.Items.Remove(ListBox2.SelectedItem)
End If
End Sub
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
For Each itm As Object In ListBox1.Items
ListBox2.Items.Add(itm)
Next
ListBox1.Items.Clear()
End Sub
Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click
For Each itm As Object In ListBox2.Items
ListBox1.Items.Add(itm)
Next
ListBox2.Items.Clear()
End Sub
End Class
VB.net 如何设计多线程运行
Sub Main()
Dim thr As Thread
For Pi As Integer=0 To 4 //启用5线程
MulParams =Pi vbTab sFile vbTab dFile vbTab 1 vbTab DelN vbTab cr vbTab cg vbTab cb vbTab IndexI
GlobalParamas(pi)=MulParams .Split(vbTab)
thr=New Thread(AddressOf MyMulThreadCaller)
thr.Start() //启动多线程进程
Application.DoEvents
Next
End Sub
vb.net 集成开发的三种模式
设计模式：界面设计和代码编辑
运行模式：运行应用程序
中断模式：暂时中断运行，调试程序
怎么利用VB.NET实现三维绘图
数学上不是有斜二测画法，算好坐标即可画出
或者用AnyCAD的.Net图形控件
也可以调用matlab 实现
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