WebPartChrome(WebPartZoneBase, WebPartManager) Constructor
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Initializes a new instance of the control.
public:
WebPartChrome(System::Web::UI::WebControls::WebParts::WebPartZoneBase ^ zone, System::Web::UI::WebControls::WebParts::WebPartManager ^ manager);
public WebPartChrome (System.Web.UI.WebControls.WebParts.WebPartZoneBase zone, System.Web.UI.WebControls.WebParts.WebPartManager manager);
new System.Web.UI.WebControls.WebParts.WebPartChrome : System.Web.UI.WebControls.WebParts.WebPartZoneBase * System.Web.UI.WebControls.WebParts.WebPartManager -> System.Web.UI.WebControls.WebParts.WebPartChrome
Public Sub New (zone As WebPartZoneBase, manager As WebPartManager)
Parameters
- zone
- WebPartZoneBase
The associated WebPartZoneBase control.
- manager
- WebPartManager
The WebPartManager control on the current page.
Exceptions
zone
is null
.
Examples
The following code example demonstrates two things. First, it creates a new instance of the custom class MyWebPartChrome
by overriding the CreateWebPartChrome method in a derived WebPartZoneBase zone called MyZone
. Second, in the constructor of the MyWebPartChrome
class, it assigns the objects in the parameters of the constructor to private fields that can be used within the class. This example thus gives you a way to access the associated zone and WebPartManager object even in the constructor, before the Zone and WebPartManager properties are accessible. Finally, note that for the constructor to work, the base constructor must also be invoked as part of the method declaration.
The following code contains the two custom classes. For the full code required to run the example, including the Web page to host these controls, see the Example section of the WebPartChrome class overview topic.
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
namespace Samples.AspNet.CS.Controls
{
[AspNetHostingPermission(SecurityAction.Demand,
Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand,
Level = AspNetHostingPermissionLevel.Minimal)]
public class MyZone : WebPartZone
{
private Boolean _renderVerbsInMenu;
protected override WebPartChrome CreateWebPartChrome()
{
WebPartChrome theChrome = new MyWebPartChrome(this,
this.WebPartManager);
if (RenderVerbsInMenu)
this.WebPartVerbRenderMode = WebPartVerbRenderMode.Menu;
else
this.WebPartVerbRenderMode = WebPartVerbRenderMode.TitleBar;
return theChrome;
}
public Boolean RenderVerbsInMenu
{
get { return _renderVerbsInMenu; }
set { _renderVerbsInMenu = value; }
}
}
[AspNetHostingPermission(SecurityAction.Demand,
Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand,
Level = AspNetHostingPermissionLevel.Minimal)]
public class MyWebPartChrome : WebPartChrome
{
WebPartZoneBase theZone;
WebPartManager theManager;
public MyWebPartChrome(WebPartZoneBase aZone, WebPartManager aManager) :
base(aZone, aManager)
{
theZone = aZone;
theManager = aManager;
}
protected override WebPartVerbCollection GetWebPartVerbs(WebPart webPart)
{
ArrayList verbSet = new ArrayList();
foreach (WebPartVerb verb in base.GetWebPartVerbs(webPart))
{
if (verb.Text != "Close")
verbSet.Add(verb);
}
WebPartVerbCollection reducedVerbSet =
new WebPartVerbCollection(verbSet);
return reducedVerbSet;
}
protected override Style CreateWebPartChromeStyle(WebPart part,
PartChromeType chromeType)
{
Style finalStyle = new Style();
finalStyle.CopyFrom(base.CreateWebPartChromeStyle(part, chromeType));
finalStyle.Font.Name = "Verdana";
return finalStyle;
}
protected override void RenderPartContents(HtmlTextWriter writer,
WebPart part)
{
if (part == this.WebPartManager.SelectedWebPart)
HttpContext.Current.Response.Write("<span>Not rendered</span>");
else
if(this.Zone.GetType() == typeof(MyZone))
part.RenderControl(writer);
}
}
}
Imports System.Collections
Imports System.ComponentModel
Imports System.Drawing
Imports System.Security.Permissions
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Namespace Samples.AspNet.VB.Controls
<AspNetHostingPermission(SecurityAction.Demand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
<AspNetHostingPermission(SecurityAction.InheritanceDemand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
Public Class MyZone
Inherits WebPartZone
Private _renderVerbsInMenu As Boolean
Protected Overrides Function CreateWebPartChrome() As WebPartChrome
Dim theChrome As WebPartChrome = _
New MyWebPartChrome(Me, Me.WebPartManager)
If RenderVerbsInMenu Then
Me.WebPartVerbRenderMode = WebPartVerbRenderMode.Menu
Else
Me.WebPartVerbRenderMode = WebPartVerbRenderMode.TitleBar
End If
Return theChrome
End Function
Public Property RenderVerbsInMenu() As Boolean
Get
Return _renderVerbsInMenu
End Get
Set(ByVal value As Boolean)
_renderVerbsInMenu = value
End Set
End Property
End Class
<AspNetHostingPermission(SecurityAction.Demand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
<AspNetHostingPermission(SecurityAction.InheritanceDemand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
Public Class MyWebPartChrome
Inherits WebPartChrome
Dim theManager As WebPartManager
Dim theZone As WebPartZoneBase
Public Sub New(ByVal aZone As WebPartZoneBase, _
ByVal aManager As WebPartManager)
MyBase.New(aZone, aManager)
theManager = aManager
theZone = aZone
End Sub
Protected Overrides Function GetWebPartVerbs _
(ByVal webPart As WebPart) As WebPartVerbCollection
Dim verbSet As New ArrayList()
Dim verb As WebPartVerb
For Each verb In MyBase.GetWebPartVerbs(webPart)
If verb.Text <> "Close" Then
verbSet.Add(verb)
End If
Next verb
Dim reducedVerbSet As WebPartVerbCollection = _
New WebPartVerbCollection(verbSet)
Return reducedVerbSet
End Function
Protected Overrides Function CreateWebPartChromeStyle _
(ByVal part As WebPart, ByVal chromeType As PartChromeType) As Style
Dim finalStyle As New Style()
finalStyle.CopyFrom(MyBase.CreateWebPartChromeStyle(Part, chromeType))
finalStyle.Font.Name = "Verdana"
Return finalStyle
End Function
Protected Overrides Sub RenderPartContents _
(ByVal writer As HtmlTextWriter, ByVal part As WebPart)
If part Is Me.WebPartManager.SelectedWebPart Then
HttpContext.Current.Response.Write("<span>Not rendered</span>")
Else
If (Me.Zone.GetType() Is GetType(MyZone)) Then
part.RenderControl(writer)
End If
End If
End Sub
End Class
End Namespace
Remarks
The WebPartChrome initializes a new instance of the WebPartChrome class. It is used primarily by a WebPartZoneBase zone in its CreateWebPartChrome method to create an instance of the WebPartChrome object that handles the chrome rendering and any custom rendering for WebPart controls in the zone.
Applies to
See also
Athugasemdir
https://aka.ms/ContentUserFeedback.
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