asp:Wizard NextButtonClick and UpdatePanel


J

JeffDotNet

I have a wizard that has a long running step (3-4 seconds) and I would like
to show a progress bar on the NextButtonClick of the Wizard. I am able to
get the trigger to work with a button and its click event. However when I
attempt to use the NextButtonClick of the wizard the UpdateProgress appears
as expected but the Wizard is no longer able to advance to the next step. I
have also noticed that when the Wizards NextButtonClick is occurs a second
time a dialog pops up stating there has been and ‘Invalid postback or
callback argument. Adding RegisterForEventValidation does not clear the
error.

Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)

Page.ClientScript.RegisterForEventValidation("Wizard1")
MyBase.Render(writer)
End Sub



I have attached a simple wizard example that shows the problem I'm having.

If someone could let me know what I’m doing wrong it would be most appreciated

Jeff


<%@ Page Language="VB" AutoEventWireup="false"
CodeFile="SimpleWizard.aspx.vb" Inherits="SimpleWizard" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Simple Wizard with UpdatePanel</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

<script language="javascript" type="text/jscript">

var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(InitializeRequest);
prm.add_endRequest(EndRequest);

var postBackElement;

function InitializeRequest(sender, args){

if (prm.get_isInAsyncPostBack())
{args.set_cancel(true);
}

postBackElement = args.get_postBackElement();

if (
(postBackElement.id == 'Button1')
|| (postBackElement.id ==
'Wizard1_StartNavigationTemplateContainerID_StartNextButton')
)
{$get('UpdateProgress1').style.display = 'block';}
}

function EndRequest(sender, args){
if (

(postBackElement.id == 'Button1')
|| (postBackElement.id ==
'Wizard1_StartNavigationTemplateContainerID_StartNextButton')
)
{$get('UpdateProgress1').style.display = 'none';}
}
</script>

</div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1"
EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="Wizard1"
EventName="NextButtonClick" />

</Triggers>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1"
AssociatedUpdatePanelID="UpdatePanel1" runat="server">
<ProgressTemplate>
<br />
UpdateProgress is working
<table style="vertical-align: middle;">
<tr style="vertical-align: top">
<td>
<img src="images/indicator.gif" height="16"
width="16" />
</td>
<td style="color: Gray">
Now Processing...
</td>
</tr>
</table>
</ProgressTemplate>
</asp:UpdateProgress>
<asp:Button ID="Button1" runat="server" Text="Test UpdatePanel
alone" OnClick="Button1_Click" />
<br />
<div style="border: solid 1pk black;">
<asp:Wizard ID="Wizard1" runat="server" DisplaySideBar="false">
<StartNavigationTemplate>
<div>
<asp:Button ID="StartCancelButton" runat="server"
BackColor="#FFFBFF" BorderColor="#CCCCCC"
BorderStyle="Solid" BorderWidth="1px"
CommandName="Cancel" Font-Names="Verdana"
Font-Size="0.8em" ForeColor="#284775" Text="Cancel"
AccessKey="c" CssClass="cancelButton"
CausesValidation="false" ToolTip="Alt+c"
Style="position: relative; left: -495px;
bottom: 5px;" />
<asp:Button ID="StartNextButton" runat="server"
BackColor="#FFFBFF" BorderColor="#CCCCCC"
BorderStyle="Solid" BorderWidth="1px"
CommandName="MoveNext" Font-Names="Verdana"
Font-Size="0.8em" ForeColor="#284775" Text="Next"
AccessKey="n" Style="position: relative; bottom:
5px; right: 10px;" />
</div>
</StartNavigationTemplate>
<WizardSteps>
<asp:WizardStep runat="server" Title="Step 1">
<div style="width: 500px; height: 200px; border:
solid 1pk black; background-color:Bisque">
<ul>
<li>Click the <span style="
font-style:italic">Test UpdateProgress alone</span> to verify the
UpdateProgress works without involving the wizard</li>
<li>Click the <span style="
font-style:italic">Next</span> button on the wizard to trigger the
UpdatePanel</li>
</ul>
<br />
Unfortunetly attempting to trigger from the
Wizard1 NextButtonClick event causes the UpdatePanel to jump but not display
the progress panel and does not allow the Wizard to advance to the next step.
</div>
</asp:WizardStep>
<asp:WizardStep runat="server" Title="Step 2">
</asp:WizardStep>
</WizardSteps>
</asp:Wizard>
</div>
</div>
</form>
</body>
</html>

!--- CodeBehind --

Option Strict On
Option Explicit On

Partial Class SimpleWizard
Inherits System.Web.UI.Page

Public Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
System.Threading.Thread.Sleep(2000)
End Sub


Public Sub Wizard1_NextButtonClick(ByVal sender As Object, ByVal e As
WizardNavigationEventArgs) Handles Wizard1.NextButtonClick
System.Threading.Thread.Sleep(2000)
End Sub

Protected Overrides Sub Render(ByVal writer As
System.Web.UI.HtmlTextWriter)
Page.ClientScript.RegisterForEventValidation("Wizard1")
MyBase.Render(writer)
End Sub

End Class
 
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A

Allen Chen [MSFT]

Hi,
I have a wizard that has a long running step (3-4 seconds) and I would like
to show a progress bar on the NextButtonClick of the Wizard. I am able to
get the trigger to work with a button and its click event. However when I
attempt to use the NextButtonClick of the wizard the UpdateProgress appears
as expected but the Wizard is no longer able to advance to the next step. I
have also noticed that when the Wizards NextButtonClick is occurs a second
time a dialog pops up stating there has been and ‘Invalid postback or
callback argument. Adding RegisterForEventValidation does not clear the
error.

If you want to update the Wizard control on async postback please put it in
the ContentTemplate of UpdatePanel. Below is the updated code that works on
my side. Please test it to see if it's what you need:

<asp:Button ID="Button1" runat="server" Text="Test
UpdatePanel
alone" OnClick="Button1_Click" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1"
EventName="Click" />


</Triggers>
<ContentTemplate>
<div style="border: solid 1pk black;">
<asp:Wizard ID="Wizard1" runat="server"
DisplaySideBar="false">
<StartNavigationTemplate>
<div>
<asp:Button ID="StartCancelButton" runat="server"
BackColor="#FFFBFF" BorderColor="#CCCCCC"
BorderStyle="Solid" BorderWidth="1px"
CommandName="Cancel" Font-Names="Verdana"
Font-Size="0.8em" ForeColor="#284775" Text="Cancel"
AccessKey="c" CssClass="cancelButton"
CausesValidation="false" ToolTip="Alt+c"
Style="position: relative; left: -495px;
bottom: 5px;" />
<asp:Button ID="StartNextButton" runat="server"
BackColor="#FFFBFF" BorderColor="#CCCCCC"
BorderStyle="Solid" BorderWidth="1px"
CommandName="MoveNext" Font-Names="Verdana"
Font-Size="0.8em" ForeColor="#284775" Text="Next"
AccessKey="n" Style="position: relative; bottom:
5px; right: 10px;" />
</div>
</StartNavigationTemplate>
<WizardSteps>
<asp:WizardStep ID="WizardStep1" runat="server"
Title="Step 1">
<div style="width: 500px; height: 200px; border:
solid 1pk black; background-color:Bisque">
<ul>
<li>Click the <span style="
font-style:italic">Test UpdateProgress alone</span> to verify the
UpdateProgress works without involving the wizard</li>
<li>Click the <span style="
font-style:italic">Next</span> button on the wizard to trigger the
UpdatePanel</li>
</ul>
<br />
Unfortunetly attempting to trigger from the
Wizard1 NextButtonClick event causes the UpdatePanel to jump but not
display
the progress panel and does not allow the Wizard to advance to the next
step.
</div>
</asp:WizardStep>
<asp:WizardStep ID="WizardStep2" runat="server"
Title="Step 2">
</asp:WizardStep>
</WizardSteps>
</asp:Wizard>
</div></ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1"
AssociatedUpdatePanelID="UpdatePanel1" runat="server">
<ProgressTemplate>
<br />
UpdateProgress is working
<table style="vertical-align: middle;">
<tr style="vertical-align: top">
<td>
<img src="images/indicator.gif" height="16"
width="16" />
</td>
<td style="color: Gray">
Now Processing...
</td>
</tr>
</table>
</ProgressTemplate>
</asp:UpdateProgress>

If you have additional questions please don't hesitate to let me know. I'll
do my best to follow up.

Regards,
Allen Chen
Microsoft Online Support

Delighting our customers is our #1 priority. We welcome your comments and
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A

Allen Chen [MSFT]

Hi,
I have a wizard that has a long running step (3-4 seconds) and I would like
to show a progress bar on the NextButtonClick of the Wizard. I am able to
get the trigger to work with a button and its click event. However when I
attempt to use the NextButtonClick of the wizard the UpdateProgress appears
as expected but the Wizard is no longer able to advance to the next step. I
have also noticed that when the Wizards NextButtonClick is occurs a second
time a dialog pops up stating there has been and ‘Invalid postback or
callback argument. Adding RegisterForEventValidation does not clear the
error.

Can my code work?

Regards,
Allen Chen
Microsoft Online Support
 

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