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自己在窗体上加一个按钮,以下是详细代码(整个类)
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Public Class Form1
Private N As Integer '用来记添加要加入textbox的个数
Private PL As Integer = 10 'textbox相对于窗体的Left
Private PT As Integer = 10 'textbox相对于窗体的Top
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.AutoScroll = True '窗体自动显示滚动条
N = 10 '初始化N为10
For i = 1 To N
Dim newtextbox As New TextBox
newtextbox.Left = PL
newtextbox.Top = PT
Me.Controls.Add(newtextbox)
PT += newtextbox.Height + 10 '各 newtextbox上下间隔10-------PL不变是希望左对齐
Next
End Sub
End Class
你还要把过程与控件事件绑定
AddHandler 控件.事件名,addressof 事件过程
RemoveHandler 这个是取消绑定
没发现自动生存的事件过程后面还有一个Hander button1.Click之类的,这就是所谓事件句柄。反而跟过程名没关系,改成阿猫阿狗也可以。
例外也可以像 Private WithEvents obj as ControlClass 这么声明控件变量,估计像vb6那样会在下拉列表中列出事件系列。
哎呀,说了半天跑题了。 ff不存在嘛多半不是它的作用域范围内,应该把ff变量定义在类中,而不是类中的某个过程中。
最好把代码添多一点,把ff部分也添出来看看。
下面这段代码完成,在窗体上用语句添加2个 GroupBox控件,且在每个GroupBox控件中添加4个 RadioButton 控件。
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim i As Integer
'添加2个GroupBox
Dim MyGroupBox(2) As GroupBox
For i = 1 To 2
'将一个GroupBox控件加入到Form上
MyGroupBox(i) = New GroupBox
Me.Controls.Add(MyGroupBox(i))
'设置该GroupBox控件的属性
MyGroupBox(i).Height = 240
MyGroupBox(i).Width = 600
MyGroupBox(i).Top = (i - 1) * (240 + 20) + 20
MyGroupBox(i).Left = 20
'修改新加入控件的Text值
MyGroupBox(i).Text = "GroupBox" CStr(i)
Next
'每个GroupBox中添加4个单选按钮
Dim MyRadioButton1(4) As RadioButton
Dim MyRadioButton2(4) As RadioButton
For i = 1 To 4
MyRadioButton1(i) = New RadioButton
Me.Controls.Add(MyRadioButton1(i))
MyRadioButton1(i).Parent = MyGroupBox(1)
'设置该GroupBox控件的属性
MyRadioButton1(i).Height = 20
MyRadioButton1(i).Width = 120
MyRadioButton1(i).Top = (i - 1) * (20 + 20) + 40
MyRadioButton1(i).Left = 20
'修改新加入控件的Text值
MyRadioButton1(i).Text = "RadioButton1_" CStr(i)
Next
For i = 1 To 4
MyRadioButton2(i) = New RadioButton
Me.Controls.Add(MyRadioButton2(i))
MyRadioButton2(i).Parent = MyGroupBox(2)
'设置该GroupBox控件的属性
MyRadioButton2(i).Height = 20
MyRadioButton2(i).Width = 120
MyRadioButton2(i).Top = (i - 1) * (20 + 20) + 40
MyRadioButton2(i).Left = 20
'修改新加入控件的Text值
MyRadioButton2(i).Text = "RadioButton2_" CStr(i)
Next
End Sub