I am having a problem where the page load event is not being fired
for certain user controls that I load dynamically in placeholders.
Here is what I'm doing in brief, with full test code supplied at the
bottom.
In my controlling .aspx page, in the page_init() sub, if not postback,
I load two user controls and place them in placeholders. This works
and a trace statement in each user control's page load handler is
executed on initial page load. Then, using a basic button in the
..aspx, I post back the page. At this point, page_load runs only in one
of the user controls. The weird thing here is that these usercontrols
are identical except that one has a datagrid control in it and the
other has a label control in it. If I remove the datagrid control from
the control where page_load always runs, it stops working; conversely,
if I add it to the other user control, page_load now runs on every
postback.
I am storing each usercontrol in session and retrieving and reinserting
it on postback (not by my design), but I would think that if this was
the problem, page_load wouldn't fire on postback for either
usercontrol. Also, autoeventwireup is set to false for all components.
Can any of you gurus help me out here?
Thanks,
Jelling
Full Code, minus the html I couldn't paste in.
PageLoadTest.aspx.vb
Public Class PageLoadTest
Inherits System.Web.UI.Page
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
'NOTE: The following placeholder declaration is required by the Web
Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Protected WithEvents Button1 As System.Web.UI.WebControls.Button
Protected WithEvents ph1 As System.Web.UI.WebControls.PlaceHolder
Protected WithEvents ph2 As System.Web.UI.WebControls.PlaceHolder
Protected WithEvents crpersontype1 As CRPersonType
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
Dim ctrl, ctrl2 As UserControl
If Not Page.IsPostBack Then
ctrl = New UserControl
ctrl = Page.LoadControl("~/clientcenter/user/test.ascx")
ctrl.ID = "crTest1"
Session("PageLoadTest_ctrl") = ctrl
ctrl2 = New UserControl
ctrl2 = Page.LoadControl("~/ClientCenter/User/test2.ascx")
ctrl2.ID = "crTest2"
Session("PageLoadTest_ctrl2") = ctrl2
ph1.Controls.Clear()
ph1.Controls.Add(ctrl)
ph2.Controls.Clear()
ph2.Controls.Add(ctrl2)
Else
ctrl = CType(Session("PageLoadTest_ctrl"), test)
ctrl2 = CType(Session("PageLoadTest_ctrl2"), test2)
ph1.Controls.Clear()
ph1.Controls.Add(ctrl)
ph2.Controls.Clear()
ph2.Controls.Add(ctrl2)
End If
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
End Class
Test.ascx.vb:
Public Class test
Inherits System.Web.UI.UserControl
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
'NOTE: The following placeholder declaration is required by the Web
Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Trace.Write("test.ascx pageload()")
End Sub
End Class
Test2.ascx.vb:
Public Class test2
Inherits BaseClientCenterUserControl
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
'NOTE: The following placeholder declaration is required by the Web
Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Trace.Write("test2.ascx pageload()")
End Sub
End Class
