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AllowNavigationToStep Method

Wizard.AllowNavigationToStep Method

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 virtual bool AllowNavigationToStep(
	int index
)

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="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>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
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