Strange problem setting focus on a TextBox within a WizardStep.

For testing purposes i have got a 2 step WizardControl. Eqach step contains
a text box, TextBox1 and TextBox2 respectively. If i put the following code
in the respective activate event handlers for the two steps,
TextBox1.Text ="foo";
and
TextBox2.Text = "bar";
Then in the first step the TextBox (TextBox1) contains the word foo and in
the second step the TextBox (TextBox2) contains the word bar. As you would
expect.
However if i replace the code with
TextBox1.Focus();
and
TextBox2.Focus();
Then i get the following error and i can't understand why. This is the
first time i have used Wizard controls and i'm just trying to work out how
they behave. What am i missing about Wizard controls that is causing this
behaviour.
A form tag with runat=server must exist on the Page to use SetFocus() or
the Focus property.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information abou
t
the error and where it originated in the code.
Exception Details: System.InvalidOperationException: A form tag with
runat=server must exist on the Page to use SetFocus() or the Focus property.
Source Error:
Line 19: protected void WizardStep1_Activate(object sender, EventArgs e)
Line 20: {
Line 21: TextBox1.Focus();
Line 22:
Line 23: }
Source File:
E:\DevelopmentWebsite\IntranetDev\Portal
\Testing\MultiViewTest.aspx.cs
Line: 21
Stack Trace:
[InvalidOperationException: A form tag with runat=server must exist on the
Page to use SetFocus() or the Focus property.]
System.Web.UI.Page.SetFocus(Control control) +2021658
System.Web.UI.Control.Focus() +20
Testing_MultiViewTest.WizardStep1_Activate(Object sender, EventArgs e) in
E:\DevelopmentWebsite\IntranetDev\Portal
\Testing\MultiViewTest.aspx.cs:21
System.Web.UI.WebControls.View.OnActivate(EventArgs e) +105
System.Web.UI.WebControls.MultiView.set_ActiveViewIndex(Int32 value) +395
System.Web.UI.WebControls.MultiView.OnInit(EventArgs e) +46
System.Web.UI.Control.InitRecursive(Control namingContainer) +321
System.Web.UI.Control.AddedControl(Control control, Int32 index) +2065279
System.Web.UI.ControlCollection.Add(Control child) +146
System.Web.UI.WebControls.Wizard.CreateControlHierarchy() +2992
System.Web.UI.WebControls.Wizard.CreateChildControls() +126
System.Web.UI.Control.EnsureChildControls() +87
System.Web.UI.WebControls.Wizard.OnInit(EventArgs e) +100
System.Web.UI.Control.InitRecursive(Control namingContainer) +321
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +692On further investigation it seems that i can't set the focus on any control
from within the activate event. I have no problems however, setting the
focus onto the textbox controls within the wizardsetps, from the Page_load
event
"clickon" wrote:

> For testing purposes i have got a 2 step WizardControl. Eqach step contai
ns
> a text box, TextBox1 and TextBox2 respectively. If i put the following co
de
> in the respective activate event handlers for the two steps,
> TextBox1.Text ="foo";
> and
> TextBox2.Text = "bar";
> Then in the first step the TextBox (TextBox1) contains the word foo and i
n
> the second step the TextBox (TextBox2) contains the word bar. As you woul
d
> expect.
> However if i replace the code with
> TextBox1.Focus();
> and
> TextBox2.Focus();
> Then i get the following error and i can't understand why. This is the
> first time i have used Wizard controls and i'm just trying to work out how
> they behave. What am i missing about Wizard controls that is causing this
> behaviour.
> A form tag with runat=server must exist on the Page to use SetFocus() or
> the Focus property.
> Description: An unhandled exception occurred during the execution of the
> current web request. Please review the stack trace for more information ab
out
> the error and where it originated in the code.
> Exception Details: System.InvalidOperationException: A form tag with
> runat=server must exist on the Page to use SetFocus() or the Focus propert
y.
> Source Error:
> Line 19: protected void WizardStep1_Activate(object sender, EventArgs
e)
> Line 20: {
> Line 21: TextBox1.Focus();
> Line 22:
> Line 23: }
>
> Source File:
> E:\DevelopmentWebsite\IntranetDev\Portal
\Testing\MultiViewTest.aspx.cs
> Line: 21
> Stack Trace:
> [InvalidOperationException: A form tag with runat=server must exist on the
> Page to use SetFocus() or the Focus property.]
> System.Web.UI.Page.SetFocus(Control control) +2021658
> System.Web.UI.Control.Focus() +20
> Testing_MultiViewTest.WizardStep1_Activate(Object sender, EventArgs e)
in
> E:\DevelopmentWebsite\IntranetDev\Portal
\Testing\MultiViewTest.aspx.cs:21
> System.Web.UI.WebControls.View.OnActivate(EventArgs e) +105
> System.Web.UI.WebControls.MultiView.set_ActiveViewIndex(Int32 value) +3
95
> System.Web.UI.WebControls.MultiView.OnInit(EventArgs e) +46
> System.Web.UI.Control.InitRecursive(Control namingContainer) +321
> System.Web.UI.Control.AddedControl(Control control, Int32 index) +20652
79
> System.Web.UI.ControlCollection.Add(Control child) +146
> System.Web.UI.WebControls.Wizard.CreateControlHierarchy() +2992
> System.Web.UI.WebControls.Wizard.CreateChildControls() +126
> System.Web.UI.Control.EnsureChildControls() +87
> System.Web.UI.WebControls.Wizard.OnInit(EventArgs e) +100
> System.Web.UI.Control.InitRecursive(Control namingContainer) +321
> System.Web.UI.Control.InitRecursive(Control namingContainer) +198
> System.Web.UI.Control.InitRecursive(Control namingContainer) +198
> System.Web.UI.Control.InitRecursive(Control namingContainer) +198
> System.Web.UI.Control.InitRecursive(Control namingContainer) +198
> System.Web.UI.Page.ProcessRequestMain(Boolean
> includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +692
>