Wizard.AllowNavigationToStep Method (Int32)

 

Uses a Boolean value to determine whether the ActiveStep property can be set to the WizardStepBase object that corresponds to the index that is passed in.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

Protected Overridable Function AllowNavigationToStep (
	index As Integer
) As Boolean

Parameters

index
Type: System.Int32

The index of the WizardStepBase object being checked.

Return Value

Type: System.Boolean

false if the index passed in refers to a WizardStepBase that has already been accessed and its AllowReturn property is set to false; otherwise, true.

The AllowNavigationToStep method can be accessed from a derived class only because of its protected modifier. In a derived class, you can use the AllowNavigationToStep method to determine whether the index that is passed in can be used to set the ActiveStepIndex property. The AllowNavigationToStep method will return false if the index that is passed in refers to a WizardStepBase object that has already been accessed and has its AllowReturn property set to false; otherwise, it will return true.

The following code example demonstrates how to create a derived class named CustomWizard and override the OnSideBarButtonClick method. When a button on the sidebar area of the CustomWizard control is clicked, the AllowNavigationToStep method is called to determine whether the selected step can be accessed. A message is then written to the containing Web page informing the user of what has occurred.

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  ' This custom wizard control defines the OnSideBarButtonClick method
  ' that uses the AllowNavigationToStep method to determine whether the
  ' value passed in can be used to set the ActiveStepIndex property.    
  Class CustomWizard
    Inherits Wizard

    Protected Overloads Sub OnSideBarButtonClick(ByVal sender As Object, _
      ByVal e As WizardNavigationEventArgs) Handles Me.SideBarButtonClick

      If AllowNavigationToStep(e.NextStepIndex) Then

        Me.Page.Response.Write("AllowNavigationToStep() returned true, moving to Step" & _
           (e.NextStepIndex + 1).ToString() & ".")
        Me.ActiveStepIndex = e.NextStepIndex

      Else

        Me.Page.Response.Write("AllowNavigationToStep() returned false for Step" & _
           (e.NextStepIndex + 1).ToString() & ", moving to Step2.")
        Me.ActiveStepIndex = 1

      End If
    End Sub
  End Class

  ' Add the custom wizard control to the page.
  Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

    Dim WizardControl As New CustomWizard()
    WizardControl.ID = "WizardControl"

    ' Create some steps for the custom wizard.
    For i As Integer = 0 To 5
      Dim newStep As New WizardStep()
      newStep.ID = "Step" & (i + 1).ToString()
      ' Set AllowReturn to false for some of the steps.        
      If ((i Mod 2) = 0) Then
        newStep.AllowReturn = False
      End If

      ' Add each step to the custom wizard.
      WizardControl.WizardSteps.Add(newStep)
    Next

    ' Display the wizard on the page.
    PlaceHolder1.Controls.Add(WizardControl)

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>AllowNavigationToStep Example</title>
</head>
<body>
    <form id="Form1" runat="server">
      <h3>AllowNavigationToStep Example</h3>
      <asp:PlaceHolder id="PlaceHolder1" 
        runat="server" />
    </form>
  </body>
</html>

.NET Framework
Available since 2.0
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