TemplateDefinition Class
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TemplateDefinition Class

 

Provides properties and methods that define a template element in a Web server control at design time.

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

System.Object
  System.Web.UI.Design.DesignerObject
    System.Web.UI.Design.TemplateDefinition

public class TemplateDefinition : DesignerObject

NameDescription
System_CAPS_pubmethodTemplateDefinition(ControlDesigner, String, Object, String)

Initializes a new instance of the TemplateDefinition class, using the provided designer, template name, template, and property name.

System_CAPS_pubmethodTemplateDefinition(ControlDesigner, String, Object, String, Boolean)

Initializes a new instance of the TemplateDefinition class, using the provided designer, template name, template, property name, and whether to limit the template contents to Web server controls.

System_CAPS_pubmethodTemplateDefinition(ControlDesigner, String, Object, String, Style)

Initializes a new instance of the TemplateDefinition class, using the provided designer, template name, template, property name, and Style object.

System_CAPS_pubmethodTemplateDefinition(ControlDesigner, String, Object, String, Style, Boolean)

Initializes a new instance of the TemplateDefinition class, using the provided designer, template name, template, property name, Style object, and whether to limit content to Web server controls.

NameDescription
System_CAPS_pubpropertyAllowEditing

Gets a value that indicates whether the template should enable editing of its contents.

System_CAPS_pubpropertyContent

Gets or sets the HTML markup representing the content of the template.

System_CAPS_pubpropertyDesigner

Gets the associated designer component.(Inherited from DesignerObject.)

System_CAPS_pubpropertyName

Gets the name of the object.(Inherited from DesignerObject.)

System_CAPS_pubpropertyProperties

Gets the object's properties.(Inherited from DesignerObject.)

System_CAPS_pubpropertyServerControlsOnly

Retrieves a value indicating whether the template should limit content to Web server controls, as set in the TemplateDefinition constructor. This property is read-only.

System_CAPS_pubpropertyStyle

Retrieves the style that should be applied to the template as set in the TemplateDefinition constructor. This property is read-only.

System_CAPS_pubpropertySupportsDataBinding

Retrieves or sets a value indicating whether the template supports data binding.

System_CAPS_pubpropertyTemplatedObject

Retrieves the component in which the template resides. This property is read-only.

System_CAPS_pubpropertyTemplatePropertyName

Retrieves the property name for the template that the design host should display in the property grid.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_protmethodGetService(Type)

Gets a service from the design host, as identified by the provided type.(Inherited from DesignerObject.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethodIServiceProvider.GetService(Type)

For a description of this member, see IServiceProvider.GetService.(Inherited from DesignerObject.)

The TemplateDefinition class provides a base template definition class that can be inherited from and extended for a control designer to use in providing support for templated controls in a design host such as Visual Studio 2005. A design host uses the properties and methods of the TemplateDefinition class to facilitate creating and editing a template at design time.

The following code example demonstrates how to derive a custom class from the ControlDesigner class. This control designer supports a control with four possible templates.

To try it, add a reference to the System.Design.dll assembly, compile the code, and then, in a design host such as Visual Studio 2005, look at the page in Design view. Select the control, click the action list to select a template to modify, and then use the drag-and-drop feature to move controls into the template.

using System;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.Design;

namespace ASPNet.Design.Samples
{
    // Set an attribute reference to the designer, and define 
    // the HTML markup that the toolbox will write into the source.
    [Designer(typeof(TemplateGroupsSampleDesigner)),
        ToolboxData("<{0}:TemplateGroupsSample runat=server></{0}:TemplateGroupsSample>")]
    public sealed class TemplateGroupsSample : WebControl, INamingContainer
    {
        // Field for the templates
        private ITemplate[] _templates;

        // Constructor
        public TemplateGroupsSample()
        {
            _templates = new ITemplate[4];
        }

        // For each template property, set the designer attributes 
        // so the property does not appear in the property grid, but 
        // changes to the template are persisted in the control.
        [Browsable(false),
            PersistenceMode(PersistenceMode.InnerProperty)]
        public ITemplate Template1
        {
            get { return _templates[0]; }
            set { _templates[0] = value; }
        }
        [Browsable(false),
            PersistenceMode(PersistenceMode.InnerProperty)]
        public ITemplate Template2
        {
            get { return _templates[1]; }
            set { _templates[1] = value; }
        }
        [Browsable(false),
            PersistenceMode(PersistenceMode.InnerProperty)]
        public ITemplate Template3
        {
            get { return _templates[2]; }
            set { _templates[2] = value; }
        }
        [Browsable(false),
            PersistenceMode(PersistenceMode.InnerProperty)]
        public ITemplate Template4
        {
            get { return _templates[3]; }
            set { _templates[3] = value; }
        }

        protected override void CreateChildControls()
        {
            // Instantiate each template inside a panel
            // then add the panel to the Controls collection
            for (int i = 0; i < 4; i++)
            {
                Panel pan = new Panel();
                _templates[i].InstantiateIn(pan);
                this.Controls.Add(pan);
            }
        }
    }

    // Designer for the TemplateGroupsSample control
    public class TemplateGroupsSampleDesigner : ControlDesigner
    {
        TemplateGroupCollection col = null;

        public override void Initialize(IComponent component)
        {
            // Initialize the base
            base.Initialize(component);
            // Turn on template editing
            SetViewFlags(ViewFlags.TemplateEditing, true);
        }

        // Add instructions to the placeholder view of the control
        public override string GetDesignTimeHtml()
        {
            return CreatePlaceHolderDesignTimeHtml("Click here and use " +
                "the task menu to edit the templates.");
        }

        public override TemplateGroupCollection TemplateGroups
        {
            get
            {

                if (col == null)
                {
                    // Get the base collection
                    col = base.TemplateGroups;

                    // Create variables
                    TemplateGroup tempGroup;
                    TemplateDefinition tempDef;
                    TemplateGroupsSample ctl;

                    // Get reference to the component as TemplateGroupsSample
                    ctl = (TemplateGroupsSample)Component;

                    // Create a TemplateGroup
                    tempGroup = new TemplateGroup("Template Set A");

                    // Create a TemplateDefinition
                    tempDef = new TemplateDefinition(this, "Template A1", 
                        ctl, "Template1", true);

                    // Add the TemplateDefinition to the TemplateGroup
                    tempGroup.AddTemplateDefinition(tempDef);

                    // Create another TemplateDefinition
                    tempDef = new TemplateDefinition(this, "Template A2", 
                        ctl, "Template2", true);

                    // Add the TemplateDefinition to the TemplateGroup
                    tempGroup.AddTemplateDefinition(tempDef);

                    // Add the TemplateGroup to the TemplateGroupCollection
                    col.Add(tempGroup);

                    // Create another TemplateGroup and populate it
                    tempGroup = new TemplateGroup("Template Set B");
                    tempDef = new TemplateDefinition(this, "Template B1", 
                        ctl, "Template3", true);
                    tempGroup.AddTemplateDefinition(tempDef);
                    tempDef = new TemplateDefinition(this, "Template B2", 
                        ctl, "Template4", true);
                    tempGroup.AddTemplateDefinition(tempDef);

                    // Add the TemplateGroup to the TemplateGroupCollection
                    col.Add(tempGroup);
                }

                return col;
            }
        }

        // Do not allow direct resizing unless in TemplateMode
        public override bool AllowResize
        {
            get
            {
                if (this.InTemplateMode)
                    return true;
                else
                    return false;
            }
        }
    }
}
<%@ Page Language="VB" %>
<%@ Register TagPrefix="aspSample" 
    Namespace="ASPNet.Design.Samples" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

       <aspSample:TemplateGroupsSample runat="server" ID="TGSample1">
       </aspSample:TemplateGroupsSample>

    </div>
    </form>
</body>
</html>

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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