Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
OnAppendToParentBuilder Method

ControlBuilder.OnAppendToParentBuilder Method

Notifies the ControlBuilder that it is being added to a parent control builder.

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

public virtual void OnAppendToParentBuilder(
	ControlBuilder parentBuilder
)

Parameters

parentBuilder
Type: System.Web.UI.ControlBuilder

The ControlBuilder object to which the current builder is added.

This example overrides the OnAppendToParentBuilder method to check the ControlType property to determine what type of control this builder is applied to. If it is a CustomTextBox, the builder checks whether the value of the HasAspCode property is included in the control. If so, an exception is thrown, if not the HasBody method is called.

using System;
using System.Web.UI;
using System.Web;
using System.Security.Permissions;

namespace ASPNET.Samples
{
	[
	AspNetHostingPermission(SecurityAction.Demand,
		Level=AspNetHostingPermissionLevel.Minimal)
	]
	public class AppendControlBuilder : ControlBuilder
	{
		// Override the OnAppendToParentBuilder method. 
		public override void OnAppendToParentBuilder(ControlBuilder parentBuilder)
		{
            // Check whether the type of the control this builder 
            // is applied to is CustomTextBox. If so, check whether 
            // ASP code blocks exist in the control. If so, call 
            // throw an Exception, if not, call the HasBody method.         
			if (ControlType == Type.GetType("CustomTextBox"))
			{
				if (HasAspCode)
					throw new Exception("This control cannot contain code blocks.");
				else
					HasBody();
			}
		}
	}
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
Show:
© 2015 Microsoft