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TemplateContainerAttribute.ContainerType Property

Gets the container control type.

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

public Type ContainerType { get; }

Property Value

Type: System.Type
The container control Type.

The following code example demonstrates how to create a templated control named TemplatedFirstControl and associate it with a container named FirstTemplateContainer. This allows the creation of custom controls that display the server time when the template is not specified and the template's content when the template is specified. The TemplateContainerAttribute class is used for the FirstTemplate property and for specifying the ContainerType property as FirstTemplateContainer.

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;

namespace Samples.AspNet.CS.Controls
{
	[ParseChildren(true)]
	public class TemplatedFirstControl : Control, INamingContainer
	{
		private ITemplate firstTemplate;
		private String text = null;
		private Control myTemplateContainer;

		[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
		protected override void OnDataBinding(EventArgs e)
		{
			EnsureChildControls();
			base.OnDataBinding(e);
		}


		[TemplateContainer(typeof(FirstTemplateContainer))]
		public ITemplate FirstTemplate
		{
			get
			{
				return firstTemplate;
			}
			set
			{
				firstTemplate = value;
			}
		}

		public String Text
		{
			get
			{
				return text;
			}
			set
			{
				text = value;
			}
		}

		public String DateTime
		{
			get
			{
				return System.DateTime.Now.ToLongTimeString();
			}

		}

		public Control MyTemplateContainer
		{
			get
			{
				return myTemplateContainer;
			}
		}

		[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
		protected override void CreateChildControls()
		{
			if (FirstTemplate != null)
			{
				myTemplateContainer = new FirstTemplateContainer(this);
				FirstTemplate.InstantiateIn(myTemplateContainer);
				Controls.Add(myTemplateContainer);
			}
			else
			{
				Controls.Add(new LiteralControl(Text + " " + DateTime));
			}
		}

	}


    public class FirstTemplateContainer : Control, INamingContainer
    {
      private TemplatedFirstControl parent;
      public FirstTemplateContainer(TemplatedFirstControl parent)
      {
        this.parent = parent;
      }

      public String Text
      {
        get
        {
          return parent.Text;
        }
      }

      public String DateTime
      {
        get 
        {
          return parent.DateTime;
        }

      }
    }

  }

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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