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Wizard.AllowNavigationToStep(Int32) Metode

  • Referensi

Definisi

Ruang nama:
System.Web.UI.WebControls
Rakitan:
System.Web.dll

Menggunakan nilai Boolean untuk menentukan apakah ActiveStep properti dapat diatur ke WizardStepBase objek yang sesuai dengan indeks yang diteruskan.

protected:
 virtual bool AllowNavigationToStep(int index);
protected virtual bool AllowNavigationToStep (int index);
abstract member AllowNavigationToStep : int -> bool
override this.AllowNavigationToStep : int -> bool
Protected Overridable Function AllowNavigationToStep (index As Integer) As Boolean

Parameter

index
Int32

Indeks objek yang WizardStepBase sedang diperiksa.

Mengembalikan

Boolean

false jika indeks yang diteruskan mengacu pada WizardStepBase yang telah diakses dan propertinya AllowReturn diatur ke false; jika tidak, true.

Contoh

Contoh kode berikut menunjukkan cara membuat kelas turunan bernama CustomWizard dan mengambil OnSideBarButtonClick alih metode . Ketika tombol di area CustomWizard bar samping kontrol diklik, AllowNavigationToStep metode dipanggil untuk menentukan apakah langkah yang dipilih dapat diakses. Pesan kemudian ditulis ke halaman Web yang berisi yang menginformasikan kepada pengguna tentang apa yang telah terjadi.

<%@ page language="C#"%>

<!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 : Wizard
  {    
    override protected void OnSideBarButtonClick(WizardNavigationEventArgs e)
    {
      base.OnSideBarButtonClick(e);
      if (AllowNavigationToStep(e.NextStepIndex))
      {
        this.Page.Response.Write("AllowNavigationToStep() returned true, moving to Step" 
          + (e.NextStepIndex + 1).ToString() + ".");
        this.ActiveStepIndex = e.NextStepIndex;
      }
      else
      {
        this.Page.Response.Write("AllowNavigationToStep() returned false for Step" 
          + (e.NextStepIndex + 1).ToString() + ", moving to Step2.");
        this.ActiveStepIndex = 1;
      }
    }         
  }
  
  // Add the custom wizard control to the page.
  void Page_Load(object sender, EventArgs e) 
  {
      CustomWizard WizardControl = new CustomWizard();
      WizardControl.ID = "WizardControl";
      
      // Create some steps for the custom wizard.
      for (int i = 0; i <= 5; i++)
      {
        WizardStep newStep = new WizardStep();
        newStep.ID = "Step" + (i + 1).ToString();
        // Set AllowReturn to false for some of the steps.        
        if ((i % 2) == 0)
        {
          newStep.AllowReturn = false;
        }
        
        // Add each step to the custom wizard.
        WizardControl.WizardSteps.Add(newStep);
      }
            
      // Display the wizard on the page.
      PlaceHolder1.Controls.Add(WizardControl);
  }
  
</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>

<%@ 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>

Keterangan

Metode AllowNavigationToStep ini dapat diakses dari kelas turunan hanya karena pengubahnya protected . Di kelas turunan, Anda dapat menggunakan AllowNavigationToStep metode untuk menentukan apakah indeks yang diteruskan dapat digunakan untuk mengatur ActiveStepIndex properti . Metode AllowNavigationToStep akan mengembalikan false jika indeks yang diteruskan mengacu pada WizardStepBase objek yang telah diakses dan propertinya AllowReturn diatur ke false; jika tidak, itu akan mengembalikan true.

Berlaku untuk

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