Add onclick event to the radio button that added dynamically
I'm creating an online exam page with 30 radiobuttons that are created dynamically at runtime.
How will I get the click event of each radiobutton and tag it in my method that I will check if the next question is need to be jump or escape.
Example:
If I'm in question 10 and answer = "Yes", red开发者_Go百科irect me to Question 15, else go to the next question
HTML code-
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:Panel ID="RadioButtonsPanel" runat="server" />
</form>
</body>
</html>
VB Code-
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
' Add each radio button
AddNewRaduiButton("MyRadio1")
AddNewRaduiButton("MyRadio2")
AddNewRaduiButton("MyRadio3")
AddNewRaduiButton("MyRadio4")
End Sub
Private Sub AddNewRaduiButton(ByVal name As String)
' Create a new radio button
Dim MyRadioButton As New RadioButton
With MyRadioButton
.ID = name
.AutoPostBack = True
.Text = String.Format("Radio Button - '{0}'", name)
End With
' Add the click event to go to the sub "MyRadioButton_CheckedChanged"
AddHandler MyRadioButton.CheckedChanged, AddressOf MyRadioButton_CheckedChanged
Page.FindControl("RadioButtonsPanel").Controls.Add(MyRadioButton)
End Sub
Protected Sub MyRadioButton_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)
' Convert the Sender object into a radio button
Dim ClickedRadioButton As RadioButton = DirectCast(sender, RadioButton)
' Display the radio button name
MsgBox(String.Format("Radio Button {0} has been Updated!", ClickedRadioButton.ID))
End Sub
Use the following statement:
AddHandler radioButton.Click, AddressOf instance.MethodName
Refer to How to: Dynamically Bind Event Handlers at Run Time in ASP.NET Web Pages
Also consider using an anonymous sub (VB2010 only) to write the event handler inline
AddHandler radioButton.Click,
Sub(s As Object, e As EventArgs)
MessageBox.Show("Awesome!")
End Sub
Adapted from here
You can also use closures...
加载中,请稍侯......
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