Dynamically generated Linkbutton does not fire Onclick event VB.Net - asp.net

Question

I have followed some of the instructions to create a new LinkButton at runtime with an event trigger and add an event handler for the LinkButton generated. I have no idea why the new LinkButton does not trigger the event added to it. Anyone please guide/correct me.
This is what I have right now.
ASPX:
<form id="myForm" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table class="mel-table" style="text-align: center" runat="server" id="mytab1">
<tbody>
<tr>
<td>Case Number :</td>
<td>
<asp:TextBox ID="caseNumber" runat="server"></asp:TextBox>
</td>
</tr>
</tbody>
</table>
<asp:Button OnClick="btnOK1_Click" ID="btnOK1" runat="server" Text="Save" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
ASPX.VB:
Protected Overloads Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Session("tablecontent") IsNot Nothing Then
mytab1 = CType(Session("tablecontent"), HtmlTable)
End If
End Sub
Public Function checking() As Boolean
Dim caseNo As Double
Try
caseNo = Convert.ToDouble((caseNumber.Text).Trim())
Catch ex As Exception
caseNo = 0
End Try
Dim r As New HtmlTableRow
Dim c0 As New HtmlTableCell
r.Cells.Add(c0)
Dim but As New LinkButton
but.ID = caseNo
but.Text = caseNo.ToString()
AddHandler but.Click, AddressOf LinkButton1_Click
c0.Controls.Add(but)
mytab1.Rows.Add(r)
Session("tablecontent") = mytab1
Return True
End Function
Protected Sub LinkButton1_Click(sender As Object, e As EventArgs)
'My Code here
End Sub
Protected Sub btnOK1_Click(sender As Object, e As EventArgs)
If (checking()) Then
ScriptManager.RegisterStartupScript(Page, Page.GetType, "Alert", "<script type='text/javascript'>alert('Success');</script>", False)
End If
End Sub

Answer 1

When you click on the "Save" button, save the data in either local storage or database and try to load the page again to fill the page with the content from the storage. In this case, you can have the content on the page and so, you can utilize the events also.

Answer 2

Whenever you create dynamic control you have to reload it on postback. I am using method call ReloadRows() for reloading added case which i am saving in ViewState:
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="true" UpdateMode="Conditional" >
<ContentTemplate>
<asp:Table class="mel-table" style="text-align: center" runat="server" id="mytab1">
<asp:TableRow>
<asp:TableCell>Case Number :</asp:TableCell>
<asp:TableCell>
<asp:TextBox ID="caseNumber" runat="server"></asp:TextBox>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Button OnClick="btnOK1_Click" ID="btnOK1" runat="server" Text="Save" />
</ContentTemplate>
</asp:UpdatePanel>
--------------------------------------------------------------------------------------------------------
Public Partial Class _Default
Inherits System.Web.UI.Page
Private listCaseNo As List(Of Double) = Nothing
Protected Sub Page_Init(sender As Object, e As EventArgs)
End Sub
Protected Sub Page_Load(sender As Object, e As EventArgs)
If ViewState("ListCases") IsNot Nothing Then
listCaseNo = DirectCast(ViewState("ListCases"), List(Of Double))
Else
listCaseNo = New List(Of Double)()
End If
ReloadRows()
End Sub
Public Function checking() As Boolean
Dim caseNo As Double = 0
Try
caseNo = Convert.ToDouble((caseNumber.Text).Trim())
Catch ex As Exception
caseNo = 0
End Try
Dim r As New TableRow()
Dim c0 As New TableCell()
r.Cells.Add(c0)
Dim but As New LinkButton()
but.ID = Convert.ToString(caseNo)
but.Text = caseNo.ToString()
AddHandler but.Click, AddressOf LinkButton1_Click
c0.Controls.Add(but)
mytab1.Rows.Add(r)
listCaseNo.Add(caseNo)
ViewState("ListCases") = listCaseNo
Return True
End Function
Private Sub ReloadRows()
For Each objCase As var In listCaseNo
Dim r As New TableRow()
Dim c0 As New TableCell()
r.Cells.Add(c0)
Dim but As New LinkButton()
but.ID = Convert.ToString(objCase)
but.Text = objCase.ToString()
AddHandler but.Click, AddressOf LinkButton1_Click
c0.Controls.Add(but)
mytab1.Rows.Add(r)
Next
End Sub
Protected Sub LinkButton1_Click(sender As Object, e As EventArgs)
'My Code here
End Sub
Protected Sub btnOK1_Click(sender As Object, e As EventArgs)
If (checking()) Then
End If
End Sub
End Class