vb.net給控件加事件

兩種方法：

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1. 用WithEvents聲明變量，這樣你就可以像對(duì)待拖上去的控件一樣操作：

Public?Class?Form3

WithEvents?btn?As?New?Button

Private?Sub?Form3_Load(sender?As?Object,?e?As?EventArgs)?Handles?Me.Load

Controls.Add(btn)

End?Sub

Private?Sub?btn_Click(sender?As?Object,?e?As?EventArgs)?Handles?btn.Click

MsgBox(Now)

End?Sub

End?Class

2. 使用AddHandler 語(yǔ)句：

Public?Class?Form3

Private?Sub?Form3_Load(sender?As?Object,?e?As?EventArgs)?Handles?Me.Load

Dim?btn?As?New?Button

AddHandler?btn.Click,?AddressOf?btn_Click

Controls.Add(btn)

End?Sub

Private?Sub?btn_Click(sender?As?Object,?e?As?EventArgs)

MsgBox(Now)

End?Sub

End?Class

WithEvents (Visual Basic)：

AddHandler 語(yǔ)句：

如何在 vb.net 為動(dòng)態(tài)生成的控件添加事件并傳遞數(shù)據(jù)

'把圖片的聲明放在外面，類里面過(guò)程外面，而且要用As，不然等會(huì)兒沒法用

Dim myPicture As New System.Windows.Forms.PictureBox()

'動(dòng)態(tài)生成的控件，加一行

Private Sub UserControl1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

Me.Panel3.Controls.Add(myPicture)

myPicture.Size =New System.Drawing.Size(115, 160)

myPicture.TabStop =False

myPicture.Name ="p"

myPicture.Cursor = Cursors.Hand

AddHandler myPicture.Click, AddressOf mypic_Click '添加事件

AddHandler returnid, AddressOf idReturned '綁定事件和過(guò)程

End Sub

'再來(lái)個(gè)事件，放在聲明的地方，就是類里面、過(guò)程外面

Private Event returnid(ByVal id As String) '這個(gè)事件可以傳遞值哦~

'普通的單擊事件

Private Sub mypic_Click()

RaiseEvent returnid(myPicture.Name)

End Sub

'會(huì)傳值的事件過(guò)程

Private Sub idReturned(ByVal id As String)

Dim bookInfo As New BookInfo

bookInfo.Show()

Me.Parent.Enabled = False

'用id變量做點(diǎn)什么吧

End Sub

如果要改事件的簽名（參數(shù)一類的）的話，得重寫控件。你可以這樣自己弄一個(gè)事件。

vb.net動(dòng)態(tài)菜單，如何添加事件？

動(dòng)態(tài)生成的控件：

Private?Sub?UserControl1_Load(sender?As?System.Object,?e?As?System.EventArgs)?Handles?MyBase.Load

Dim?myPicture?=?New?System.Windows.Forms.PictureBox()

Me.Panel3.Controls.Add(myPicture)

myPicture.Size?=?New?System.Drawing.Size(115,?160)

myPicture.TabStop?=?False

myPicture.Name?=?"p"?

myPicture.Cursor?=?Cursors.Hand

AddHandler?myPicture.Click,?AddressOf?mypic_Click?'添加事件

End?Sub

處理事件的過(guò)程：

Private?Sub?mypic_Click()?'ByVal?id?As?String

Dim?bookInfo?As?New?BookInfo

bookInfo.Show()

Me.Parent.Enabled?=?False