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| using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.Design.WebControls;
using System.Web.UI.WebControls;
namespace Samples.ASPNet.ControlDesigners_CS
{
[Designer(typeof(MyMultiRegionControlDesigner)),
ToolboxData("<{0}:MyMultiRegionControl runat=\"server\" width=\"200\"></{0}:MyMultiRegionControl>")]
public class MyMultiRegionControl : CompositeControl
{
private Control myTemplateContainer;
// Define the templates that represent 2 views on the control
private ITemplate _view;
// Create persistable inner properties
// for the two editable views
[DefaultValue(null),
PersistenceMode(PersistenceMode.InnerProperty)
,TemplateContainer(typeof(ViewContainer))]
public virtual ITemplate MyView
{
get { return _view; }
set { _view = value; }
}
// Create a simple table with a row of two clickable,
// readonly headers and a row with a single column, which
// is the 'container' to which we'll be adding controls.
protected override void CreateChildControls()
{
// Always start with a clean form
Controls.Clear();
// Create a table using the control's declarative properties
Table t = new Table();
t.CellSpacing = 1;
t.BorderStyle = BorderStyle;
t.Width = this.Width;
t.Height = this.Height;
// Create the header row
TableRow tr = new TableRow();
tr.HorizontalAlign = HorizontalAlign.Center;
tr.BackColor = Color.LightBlue;
// This cell represents our content 'container'
TableCell tc = new TableCell();
tc.Height = new Unit(20);
//----------------------------------------------------
//----------------------------------------------------
if (MyView != null)
{
myTemplateContainer = new ViewContainer(this);
MyView.InstantiateIn(myTemplateContainer);
tc.Controls.Add(myTemplateContainer);
}
//----------------------------------------------------
//----------------------------------------------------
tr.Cells.Add(tc);
t.Rows.Add(tr);
// Add the finished table to the Controls collection
Controls.Add(t);
}
protected override void OnDataBinding(EventArgs e)
{
EnsureChildControls();
base.OnDataBinding(e);
}
}
public class ViewContainer : Control, INamingContainer
{
private MyMultiRegionControl parent;
public ViewContainer(MyMultiRegionControl parent)
{
this.parent = parent;
}
}
//---------------------------------------------------------
// Region-based control designer for the above web control,
// derived from CompositeControlDesigner.
public class MyMultiRegionControlDesigner : CompositeControlDesigner
{
private MyMultiRegionControl myControl;
public override void Initialize(IComponent component)
{
base.Initialize(component);
myControl = (MyMultiRegionControl)component;
}
// Make this control resizeable on the design surface
public override bool AllowResize
{
get
{
return true;
}
}
// Use the base to create child controls, then add region markers
protected override void CreateChildControls()
{
base.CreateChildControls();
// Get a reference to the table, which is the first child control
Table t = (Table)myControl.Controls[0];
// Add design time markers for each of the three regions
if (t != null)
{
t.Rows[0].Cells[0].Attributes[DesignerRegion.DesignerRegionAttributeName] = "0";
}
}
// Create the regions and design-time markup. Called by the designer host.
public override String GetDesignTimeHtml(DesignerRegionCollection regions)
{
// Create an editable region and add it to the regions
EditableDesignerRegion editableRegion =
new EditableDesignerRegion(this,
"Content", false);
regions.Add(editableRegion);
// Use the base class to render the markup
return base.GetDesignTimeHtml();
}
// Get the content string for the selected region. Called by the designer host?
public override string GetEditableDesignerRegionContent(EditableDesignerRegion region)
{
// Get a reference to the designer host
IDesignerHost host = (IDesignerHost)Component.Site.GetService(typeof(IDesignerHost));
if (host != null)
{
ITemplate template = myControl.MyView;
// Persist the template in the design host
if (template != null)
return ControlPersister.PersistTemplate(template, host);
}
return String.Empty;
}
// Create a template from the content string and
// put it in the selected view.
public override void SetEditableDesignerRegionContent(EditableDesignerRegion region, string content)
{
if (content == null)
return;
// Get a reference to the designer host
IDesignerHost host = (IDesignerHost)Component.Site.GetService(typeof(IDesignerHost));
if (host != null)
{
// Create a template from the content string
ITemplate template = ControlParser.ParseTemplate(host, content);
if (template != null)
{
myControl.MyView = template;
}
}
}
}
} |
[C#] problème rendu custom web control
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