Another dynamic usercontrol issue

[Bryan]

Hello All,

I have a page that dynamically adds one of many usercontrols to a
placeholder on the main page based on a parameter passed to the page.

Here is my problem.

The usercontrol may have something as simple as a label or a datagrid and I
get the same error.

The control renders in the designer and the code has the object declared.
Basically everything is were it should be. Once you run the page and try to
assign text to a label or bind data to a data grid you get a "Object
reference not set to an instance of an object." error. What the heck is
going on? This control works in a page that doesn't load it dynamic.

Does anyone have any ideas?

-----------------------------
MyControl.ascx - Code
<%@ Control Language="vb" AutoEventWireup="false"
Codebehind="floorplans.ascx.vb" Inherits="Tandem.floorplans"
TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
<div id="text">
<asp:Label id="Label1" runat="server"></asp:Label>
</div>

-----------------------------
MyControl.ascx.vb - Code

Protected WithEvents Label1 As System.Web.UI.WebControls.Label

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
LoadContent()
End If
End Sub

Private Sub LoadContent()
Label1.Text = "Some Text"
End Sub

-----------------------------
This is the code that adds the control on the page side. The function that
calls the following code is in the onload event of the page

Dim ctl As New MyConrol

ctl.PropertyID = PropertyID
Page.LoadControl("controls/MyControl.ascx")
phControl.Controls.Add(ctl)
Thanks,
B

[Matt Berther]

Hello Bryan,

You need to do

ctl = Page.LoadControl("controls/MyControl.ascx")
ctl.PropertyID = PropertyID

phControl.Controls.Add(ctl)

Page.LoadControl returns a Control. This is what you need to add to your
controls collection.

--
Matt Berther
http://www.mattberther.com

Hello All,

I have a page that dynamically adds one of many usercontrols to a
placeholder on the main page based on a parameter passed to the page.

Here is my problem.

The usercontrol may have something as simple as a label or a datagrid
and I get the same error.

The control renders in the designer and the code has the object
declared. Basically everything is were it should be. Once you run the
page and try to assign text to a label or bind data to a data grid you
get a "Object reference not set to an instance of an object." error.
What the heck is going on? This control works in a page that doesn't
load it dynamic.

Does anyone have any ideas?

-----------------------------
MyControl.ascx - Code
<%@ Control Language="vb" AutoEventWireup="false"
Codebehind="floorplans.ascx.vb" Inherits="Tandem.floorplans"
TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
<div id="text">
<asp:Label id="Label1" runat="server"></asp:Label>
</div>
-----------------------------
MyControl.ascx.vb - Code
Protected WithEvents Label1 As System.Web.UI.WebControls.Label

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
LoadContent()
End If
End Sub
Private Sub LoadContent()
Label1.Text = "Some Text"
End Sub
-----------------------------
This is the code that adds the control on the page side. The function
that
calls the following code is in the onload event of the page
Dim ctl As New MyConrol

ctl.PropertyID = PropertyID
Page.LoadControl("controls/MyControl.ascx")
phControl.Controls.Add(ctl)
Thanks,
B

[Bryan]

That did the trick!!!

Thanks

"Matt Berther" <mb******@hotmail.com> wrote in message
news:65***********************@news.microsoft.com. ..

Hello Bryan,

You need to do

ctl = Page.LoadControl("controls/MyControl.ascx")
ctl.PropertyID = PropertyID

phControl.Controls.Add(ctl)

Page.LoadControl returns a Control. This is what you need to add to your
controls collection.

--
Matt Berther
http://www.mattberther.com

Hello All,

I have a page that dynamically adds one of many usercontrols to a
placeholder on the main page based on a parameter passed to the page.

Here is my problem.

The usercontrol may have something as simple as a label or a datagrid
and I get the same error.

The control renders in the designer and the code has the object
declared. Basically everything is were it should be. Once you run the
page and try to assign text to a label or bind data to a data grid you
get a "Object reference not set to an instance of an object." error.
What the heck is going on? This control works in a page that doesn't
load it dynamic.

Does anyone have any ideas?

-----------------------------
MyControl.ascx - Code
<%@ Control Language="vb" AutoEventWireup="false"
Codebehind="floorplans.ascx.vb" Inherits="Tandem.floorplans"
TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
<div id="text">
<asp:Label id="Label1" runat="server"></asp:Label>
</div>
-----------------------------
MyControl.ascx.vb - Code
Protected WithEvents Label1 As System.Web.UI.WebControls.Label

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
LoadContent()
End If
End Sub
Private Sub LoadContent()
Label1.Text = "Some Text"
End Sub
-----------------------------
This is the code that adds the control on the page side. The function
that
calls the following code is in the onload event of the page
Dim ctl As New MyConrol

ctl.PropertyID = PropertyID
Page.LoadControl("controls/MyControl.ascx")
phControl.Controls.Add(ctl)
Thanks,
B

[Bryan]

Here is the resolution for all who would like to know.

Old code:
Dim ctl As New MyConrol
ctl.PropertyID = PropertyID
Page.LoadControl("controls/MyControl.ascx")
phControl.Controls.Add(ctl)
New Code:
Dim ctl As MyConrol
ctl = Page.LoadControl("controls/MyControl.ascx")
ctl.PropertyID = PropertyID
phControl.Controls.Add(ctl)

That was all that needed to be changed.

"Bryan" <bp*****@gmail.com> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...

Hello All,

I have a page that dynamically adds one of many usercontrols to a
placeholder on the main page based on a parameter passed to the page.

Here is my problem.

The usercontrol may have something as simple as a label or a datagrid and
I
get the same error.

The control renders in the designer and the code has the object declared.
Basically everything is were it should be. Once you run the page and try
to
assign text to a label or bind data to a data grid you get a "Object
reference not set to an instance of an object." error. What the heck is
going on? This control works in a page that doesn't load it dynamic.

Does anyone have any ideas?

-----------------------------
MyControl.ascx - Code
<%@ Control Language="vb" AutoEventWireup="false"
Codebehind="floorplans.ascx.vb" Inherits="Tandem.floorplans"
TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
<div id="text">
<asp:Label id="Label1" runat="server"></asp:Label>
</div>

-----------------------------
MyControl.ascx.vb - Code

Protected WithEvents Label1 As System.Web.UI.WebControls.Label

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
LoadContent()
End If
End Sub

Private Sub LoadContent()
Label1.Text = "Some Text"
End Sub

-----------------------------
This is the code that adds the control on the page side. The function that
calls the following code is in the onload event of the page

Dim ctl As New MyConrol

ctl.PropertyID = PropertyID
Page.LoadControl("controls/MyControl.ascx")
phControl.Controls.Add(ctl)
Thanks,
B