以编程方式向表单添加控件 [英] Programmatically add controls to form
问题描述
我正在使用附加的代码在现有集下方添加另一行\行控件(单击标签时).可能添加了很多行,因此我不得不使用计数器 (i) 多次重复代码以跟踪...
I'm using the attached code to add another line\row of controls beneath an existing set (when a label is clicked). There could be quite a few rows added so I'm having to repeat the code many times using the counter (i) to keep track...
有没有更好的方法来做到这一点?
Is there a better method for doing this?
Private Sub Label10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LblExpandSearch.Click
If i = 0 Then
'TextBox7
'
Dim TextBox7 As New TextBox
TextBox7.Size = New Size(302, 20)
TextBox7.Name = "TextBox7"
TextBox7.Location = New System.Drawing.Point(60, 135)
Me.ExpAdvancedSearch.Controls.Add(TextBox7)
'RadioButton5
'
Dim RadioButton5 As New RadioButton
RadioButton5.AutoSize = True
RadioButton5.Checked = True
RadioButton5.Location = New System.Drawing.Point(77, 112)
RadioButton5.Name = "RadioButton5"
RadioButton5.Size = New System.Drawing.Size(55, 17)
RadioButton5.TabIndex = 48
RadioButton5.TabStop = True
RadioButton5.Text = "NEAR"
RadioButton5.UseVisualStyleBackColor = True
ElseIf i = 1 Then
ExpAdvancedSearch.Size_ExpandedHeight = 260
'TextBox8
'
Dim TextBox8 As New TextBox
TextBox8.Size = New Size(302, 20)
TextBox8.Name = "TextBox8"
TextBox8.Location = New System.Drawing.Point(60, 185)
Me.ExpAdvancedSearch.Controls.Add(TextBox8)
'RadioButton9
'
Dim RadioButton9 As New RadioButton
RadioButton9.AutoSize = True
RadioButton9.Checked = True
RadioButton9.Location = New System.Drawing.Point(77, 162)
RadioButton9.Name = "RadioButton9"
RadioButton9.Size = New System.Drawing.Size(55, 17)
RadioButton9.TabIndex = 48
RadioButton9.TabStop = True
RadioButton9.Text = "NEAR"
RadioButton9.UseVisualStyleBackColor = True
End If
i = i + 1
End Sub
推荐答案
嗯.. UseVisualStyleBackColor 对我说 'winforms'.
Hmmm.. UseVisualStyleBackColor says 'winforms' to me.
然后只需添加它的实例.
Then just add instances of that.
使用链接标签或按钮.其他任何东西 = 对用户来说都是刻薄的.当然对你有意义,你想到了!现在对于用户来说,这是黑白分明的.
Use a linklabel or button. Anything else = being mean to users. Of course it makes sense to you, you thought of it! Now so with users, this is black and white.
当然非常少.你会想要:
Very minimal of course. You'll want to:
- 将项目放在可滚动面板中,而不是直接放在表单上.
- 也可能将它们添加到 uc 的通用列表中.
- 设置表单的最小/最大尺寸 - 允许合理的尺寸(允许任何高度 > ~100)
- 设置 uc 和控件 .Anchor 属性以允许合理调整大小
Public Class uc
Inherits System.Windows.Forms.UserControl
Private components As System.ComponentModel.IContainer
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Friend WithEvents LinkLabel1 As System.Windows.Forms.LinkLabel
Public Sub New()
MyBase.New()
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.LinkLabel1 = New System.Windows.Forms.LinkLabel
Me.SuspendLayout()
Me.TextBox1.Location = New System.Drawing.Point(8, 8)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.Size = New System.Drawing.Size(88, 20)
Me.TextBox1.TabIndex = 0
Me.TextBox1.Text = "TextBox1"
Me.LinkLabel1.Enabled = False
Me.LinkLabel1.Location = New System.Drawing.Point(112, 8)
Me.LinkLabel1.Name = "LinkLabel1"
Me.LinkLabel1.Size = New System.Drawing.Size(24, 16)
Me.LinkLabel1.TabIndex = 1
Me.LinkLabel1.TabStop = True
Me.LinkLabel1.Text = "add"
Me.Controls.Add(Me.LinkLabel1)
Me.Controls.Add(Me.TextBox1)
Me.Name = "uc"
Me.Size = New System.Drawing.Size(148, 36)
Me.ResumeLayout(False)
End Sub
Private _addcallback As EventHandler = Nothing
Public Property AddCallback() As EventHandler
Get
Return _addcallback
End Get
Set(ByVal Value As EventHandler)
_addcallback = Value
LinkLabel1.Enabled = Not Value Is Nothing
End Set
End Property
Private Sub LinkLabel1_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel1.LinkClicked
If AddCallback Is Nothing Then Throw New ApplicationException("AddCallback not set on a uc") ' ALWAYS check for errors like this
_addcallback(Me, Nothing)
AddCallback = Nothing ' gray myself out, can't insert in thie implementation
End Sub
End Class
frm.vb
Public Class frm
Inherits System.Windows.Forms.Form
Private components As System.ComponentModel.IContainer
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Name = "Form1"
Me.Text = "Form1"
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
AddClicked(Me, Nothing)
End Sub
Private Sub AddClicked(ByVal sender As Object, ByVal e As System.EventArgs)
Dim myuc As New uc
myuc.AddCallback = AddressOf AddClicked
If Controls.Count > 0 Then
myuc.Top = Controls(Controls.Count - 1).Bottom
End If
Me.Controls.Add(myuc)
End Sub
End Class
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