带循环的动态创建按钮 VB.Net
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Dynamic created Buttons VB.Net with Loop
提问by deru
I have a very strange Problem with dynamic created Buttons in VB.NET: The Click Event is not fired when creating them in a Loop. Here is my code:
我在 VB.NET 中动态创建按钮有一个非常奇怪的问题：在循环中创建它们时不会触发 Click 事件。这是我的代码：
Panel1.Controls.Clear()
For i As Integer = 0 To 100 Step 1
Dim b15 As new Button
b15.Text = "Test3"
b15.id = "a" & i
AddHandler b15.Click, AddressOf updateFunc
Panel1.Controls.Add(b15)
Next
This one doesn't work (only the PageLoad is fired, not the Click Event), but when i type
这个不起作用（只有 PageLoad 被触发，而不是 Click 事件），但是当我输入时
Dim b14 As New Button
b14.Text = "Test"
b14.id = "asdf"
AddHandler b14.Click, AddressOf updateFunc
Panel1.Controls.Add(b14)
it works fine and the Event is fired.
它工作正常并且事件被触发。
The Header of the Function updateFunc is the following:
函数 updateFunc 的头部如下：
Protected Sub updateFunc(ByVal sender As Object, ByVal e As System.EventArgs)
Any ideas why it doesn't work with the Loop? Thanks for answers!
任何想法为什么它不适用于 Loop？感谢您的回答！
采纳答案by HengChin
Do you include IsPostBackchecking? I assume you did. Try create the control outside.
您是否包括IsPostBack检查？我假设你做到了。尝试在外部创建控件。
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
'Do Something
Else
'Do Something else
End If
Panel1.Controls.Clear()
For i As Integer = 0 To 10 Step 1
Dim b15 As New Button
b15.Text = "Test3"
b15.ID = "a" & i
AddHandler b15.Click, AddressOf updateFunc
Panel1.Controls.Add(b15)
Next
End Sub
回答by user6177004
flpnlContent.Controls.Clear()
For i As Integer = 0 To 10
Dim b15 As New Button
b15.Text = "a" & i
b15.Name = "a" & i
AddHandler b15.Click, AddressOf btn_Click
flpnlContent.Controls.Add(b15)
Next
use this it will work
使用它会起作用
