You can programmatically enable and disable the Next button (also works for the other buttons; Previous, Finish) in the Wizard control of ASP.NET 2.0.

 

Button btnNext = (Button)Wizard1.FindControl("StartNavigationTemplateContainerID").FindControl("StartNextButton");

if (btnNext != null)

{

   btnNext.Enabled = false;

}

 

The above code only works for the StartNavigationTemplate.

For the StepNavigationTemplate, change the StartNavigationTemplateContainerID to StepNavigationTemplateContainerID and the StartNextButton to StepNextButton.