vb.net控件訪問(wèn) VBNET教程
VB.net中怎么調(diào)用控件的事件
軟糖來(lái)回答羅。
創(chuàng)新互聯(lián)是網(wǎng)站建設(shè)技術(shù)企業(yè)，為成都企業(yè)提供專業(yè)的成都網(wǎng)站建設(shè)、網(wǎng)站制作，網(wǎng)站設(shè)計(jì)，網(wǎng)站制作，網(wǎng)站改版等技術(shù)服務(wù)。擁有10年豐富建站經(jīng)驗(yàn)和眾多成功案例，為您定制適合企業(yè)的網(wǎng)站。10年品質(zhì)，值得信賴！
“調(diào)用事件”有歧義，你的意思是不是下面兩種：
調(diào)用事件處理方法
直接調(diào)用對(duì)象名.方法名
'例如有這樣一個(gè)按鈕點(diǎn)擊事件處理程序
Private?Sub?Button1_Click(sender?As?Object,?e?As?EventArgs)?Handles?Button1.Click
秒表.Start()
End?Sub
'調(diào)用它直接用
Button1_Click(me,?new?EventArgs())
引發(fā)事件
Button1.Click.Invoke(me,?new?EventArgs())
另外?RaiseEvent 也可以引發(fā)事件，但不能使用 RaiseEvent?來(lái)引發(fā)派生窗體的控件事件，只有自己定義的類的事件才能用它引發(fā)。
如滿意，請(qǐng)采納，謝謝。
VB.NET跨線程操作控件
最簡(jiǎn)單的方法是
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Control.CheckForIllegalCrossThreadCalls = False'加入這句代碼就可以在別的線程訪問(wèn)窗體控件了
End Sub
你好，我想請(qǐng)教一下vb.net中怎么調(diào)用用戶控件，謝謝！
與使用System.Windows.Forms命名空間中的控件的用法沒(méi)有區(qū)別。
首先添加引用。
其次導(dǎo)入(Imports)命名空間。
接著就可以使用了：
1、要使用用戶控件的實(shí)例成員，就先創(chuàng)建一個(gè)用戶控件的實(shí)例，再通過(guò)實(shí)例名.實(shí)例成員名訪問(wèn)；
2、要使用用戶控件的共享（Shared）成員，通過(guò)用戶控件類名.共享成員名訪問(wèn)。
如果你問(wèn)的是怎樣創(chuàng)建自己的用戶控件類：
1、繼承類System.Windows.Forms.UserControl；
2、繼承任何一個(gè)已經(jīng)存在的控件類（只要這個(gè)控件類不是NotInheritable的就行）。
vb.net如何在串口接收事件中訪問(wèn)并修改另一個(gè)窗體的控件？
可以將Form1里的串口公開(kāi),然后在Form2里添加對(duì)DataReceived事件的處理
Form1.Designer.cs中將
private System.IO.Ports.SerialPort port;改為
publice System.IO.Ports.SerialPort port;
然后在Form2里加上
Form1.port.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(port_DataReceived);
最后在
void port_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
在這里進(jìn)行處理就可以了;
}
這個(gè)是C#的,VB的你自己轉(zhuǎn)一下
vb.net如何調(diào)用窗體之間的控件
Public Class ks
Inherits System.Windows.Forms.Form
#Region " Windows 窗體設(shè)計(jì)器生成的代碼 "
Public Sub New()
MyBase.New()
'該調(diào)用是 Windows 窗體設(shè)計(jì)器所必需的。
InitializeComponent()
'在 InitializeComponent() 調(diào)用之后添加任何初始化
End Sub
'窗體重寫 dispose 以清理組件列表。
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Windows 窗體設(shè)計(jì)器所必需的
Private components As System.ComponentModel.IContainer
'注意: 以下過(guò)程是 Windows 窗體設(shè)計(jì)器所必需的
'可以使用 Windows 窗體設(shè)計(jì)器修改此過(guò)程。
'不要使用代碼編輯器修改它。
Friend WithEvents tx As System.Windows.Forms.TextBox
Friend WithEvents ty As System.Windows.Forms.TextBox
Friend WithEvents tz As System.Windows.Forms.TextBox
Friend WithEvents ok As System.Windows.Forms.Button
Friend WithEvents l1 As System.Windows.Forms.Label
Friend WithEvents l2 As System.Windows.Forms.Label
Friend WithEvents l3 As System.Windows.Forms.Label
System.Diagnostics.DebuggerStepThrough() Private Sub InitializeComponent()
Me.l1 = New System.Windows.Forms.Label
Me.l2 = New System.Windows.Forms.Label
Me.l3 = New System.Windows.Forms.Label
Me.tx = New System.Windows.Forms.TextBox
Me.ty = New System.Windows.Forms.TextBox
Me.tz = New System.Windows.Forms.TextBox
Me.ok = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'l1
'
Me.l1.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.l1.Location = New System.Drawing.Point(8, 8)
Me.l1.Name = "l1"
Me.l1.Size = New System.Drawing.Size(200, 16)
Me.l1.TabIndex = 0
'
'l2
'
Me.l2.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.l2.Location = New System.Drawing.Point(8, 32)
Me.l2.Name = "l2"
Me.l2.Size = New System.Drawing.Size(200, 16)
Me.l2.TabIndex = 1
'
'l3
'
Me.l3.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.l3.Location = New System.Drawing.Point(8, 56)
Me.l3.Name = "l3"
Me.l3.Size = New System.Drawing.Size(200, 16)
Me.l3.TabIndex = 2
'
'tx
'
Me.tx.Location = New System.Drawing.Point(8, 80)
Me.tx.Name = "tx"
Me.tx.Size = New System.Drawing.Size(200, 25)
Me.tx.TabIndex = 3
Me.tx.Text = "請(qǐng)輸入x"
'
'ty
'
Me.ty.Location = New System.Drawing.Point(8, 104)
Me.ty.Name = "ty"
Me.ty.Size = New System.Drawing.Size(200, 25)
Me.ty.TabIndex = 4
Me.ty.Text = "請(qǐng)輸入y"
'
'tz
'
Me.tz.Location = New System.Drawing.Point(8, 128)
Me.tz.Name = "tz"
Me.tz.Size = New System.Drawing.Size(200, 25)
Me.tz.TabIndex = 5
Me.tz.Text = "請(qǐng)輸入z"
'
'ok
'
Me.ok.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.ok.Location = New System.Drawing.Point(8, 160)
Me.ok.Name = "ok"
Me.ok.Size = New System.Drawing.Size(200, 64)
Me.ok.TabIndex = 6
Me.ok.Text = "ok"
'
'ks
'
Me.AutoScaleBaseSize = New System.Drawing.Size(8, 18)
Me.BackColor = System.Drawing.Color.FromArgb(CType(128, Byte), CType(128, Byte), CType(255, Byte))
Me.ClientSize = New System.Drawing.Size(216, 232)
Me.Controls.Add(Me.ok)
Me.Controls.Add(Me.tz)
Me.Controls.Add(Me.ty)
Me.Controls.Add(Me.tx)
Me.Controls.Add(Me.l3)
Me.Controls.Add(Me.l2)
Me.Controls.Add(Me.l1)
Me.Name = "ks"
Me.Text = "考試"
Me.ResumeLayout(False)
End Sub
#End Region
Dim x, y, z, a, b, c, d, aa, bb, cc As Single
Dim tts, alls As Single
Private Sub ks_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
x = Int(1 + 30 * Rnd())
y = Int(1 + 20 * Rnd())
z = Int(1 + 25 * Rnd())
a = Int(2 + 4 * Rnd())
b = Int(1 + a * 2 * Rnd())
c = Int(1 + b * 2 * Rnd())
d = Int(1 + c * 3 * Rnd())
aa = x + y + z
bb = a * x + b * y + c * z
cc = b * x + c * y + d * z
l1.Text = "x+y+z=" Str(aa)
l2.Text = Str(a) "x+" Str(b) "y+" Str(c) "z=" Str(bb)
l3.Text = Str(b) "x+" Str(c) "y+" Str(d) "z=" Str(cc)
End Sub
Private Sub ok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ok.Click
If Val(tx.Text) = x And Val(ty.Text) = y And Val(tz.Text) = z Then
tts = tts + 1
End If
alls = alls + 1
tx.Text = ""
ty.Text = ""
tz.Text = ""
x = Int(1 + (1000 ^ 0.5) * Rnd())
y = Int(1 + (10000 ^ 0.4) * Rnd())
z = Int(1 + (100000 ^ 0.3) * Rnd())
a = Int(2 + 4 * Rnd())
b = Int(1 + a * 2 * Rnd())
c = Int(1 + b * 2 * Rnd())
d = Int(1 + c * 3 * Rnd())
aa = x + y + z
bb = a * x + b * y + c * z
cc = b * x + c * y + d * z
l1.Text = "x+y+z=" Str(aa)
l2.Text = Str(a) "x+" Str(b) "y+" Str(c) "z=" Str(bb)
l3.Text = Str(b) "x+" Str(c) "y+" Str(d) "z=" Str(cc)
End Sub
Private Sub ks_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Click
Dim lv As Single
If Not (alls = 0) Then
lv = Int(tts * 100000 / alls) / 1000
MsgBox(Str(lv) "%", , "正確率")
tx.Visible = False
ty.Visible = False
tz.Visible = False
ok.Visible = False
l1.Visible = False
l2.Visible = False
l3.Visible = False
Else
MsgBox("答題!", , "答題!")
End If
End Sub
End Class
vb.net 多線程 訪問(wèn)界面控件
建議你使用BackGroundWorker控件。將代碼寫入控件的事件中，使用它的Start方法就可以開(kāi)始工作了。是與主程序同時(shí)進(jìn)行的。
當(dāng)前文章：vb.net控件訪問(wèn) VBNET教程
當(dāng)前路徑：http://m.jiaotiyi.com/article/hioies.html