PageCatalogPart.GetWebPart(WebPartDescription) Метод
Определение
Важно!
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Возвращает ссылку на элемент управления WebPart по описанию, которое передается методу.
public:
override System::Web::UI::WebControls::WebParts::WebPart ^ GetWebPart(System::Web::UI::WebControls::WebParts::WebPartDescription ^ description);
public override System.Web.UI.WebControls.WebParts.WebPart GetWebPart (System.Web.UI.WebControls.WebParts.WebPartDescription description);
override this.GetWebPart : System.Web.UI.WebControls.WebParts.WebPartDescription -> System.Web.UI.WebControls.WebParts.WebPart
Public Overrides Function GetWebPart (description As WebPartDescription) As WebPart
Параметры
- description
- WebPartDescription
Объект WebPartDescription, содержащий сведения об элементе управления.
Возвращаемое значение
Ссылка на действительный экземпляр закрытого элемента управления WebPart, описание которого совпадает с параметром description
.
Исключения
description
имеет значение null
.
Параметр description
не является доступным значением WebPartDescription.
Примеры
В следующем примере кода показано применение метода GetWebPart. Этот пример состоит из четырех частей:
Пользовательский элемент управления, позволяющий изменять режимы отображения на странице веб-частей.
Файл исходного кода, содержащий два пользовательских WebPart элемента управления.
Веб-страница, содержащая CatalogZone элемент управления и элемент управления, ссылающийся PageCatalogPart на несколько серверных элементов управления. Страница также содержит код обработки событий, который вызывает GetWebPart метод .
Описание работы примера при загрузке страницы в браузере.
Первая часть этого примера кода — это пользовательский элемент управления, который позволяет пользователям изменять режимы отображения на веб-странице. Дополнительные сведения о режимах отображения и описание исходного кода в этом элементе управления см. в разделе Пошаговое руководство. Изменение режимов отображения на странице веб-частей.
<%@ control language="C#" classname="DisplayModeMenuCS"%>
<script runat="server">
// Use a field to reference the current WebPartManager.
WebPartManager _manager;
void Page_Init(object sender, EventArgs e)
{
Page.InitComplete += new EventHandler(InitComplete);
}
void InitComplete(object sender, System.EventArgs e)
{
_manager = WebPartManager.GetCurrentWebPartManager(Page);
String browseModeName = WebPartManager.BrowseDisplayMode.Name;
// Fill the dropdown with the names of supported display modes.
foreach (WebPartDisplayMode mode in _manager.SupportedDisplayModes)
{
String modeName = mode.Name;
// Make sure a mode is enabled before adding it.
if (mode.IsEnabled(_manager))
{
ListItem item = new ListItem(modeName, modeName);
DisplayModeDropdown.Items.Add(item);
}
}
// If shared scope is allowed for this user, display the scope-switching
// UI and select the appropriate radio button for the current user scope.
if (_manager.Personalization.CanEnterSharedScope)
{
Panel2.Visible = true;
if (_manager.Personalization.Scope == PersonalizationScope.User)
RadioButton1.Checked = true;
else
RadioButton2.Checked = true;
}
}
// Change the page to the selected display mode.
void DisplayModeDropdown_SelectedIndexChanged(object sender, EventArgs e)
{
String selectedMode = DisplayModeDropdown.SelectedValue;
WebPartDisplayMode mode = _manager.SupportedDisplayModes[selectedMode];
if (mode != null)
_manager.DisplayMode = mode;
}
// Set the selected item equal to the current display mode.
void Page_PreRender(object sender, EventArgs e)
{
ListItemCollection items = DisplayModeDropdown.Items;
int selectedIndex =
items.IndexOf(items.FindByText(_manager.DisplayMode.Name));
DisplayModeDropdown.SelectedIndex = selectedIndex;
}
// Reset all of a user's personalization data for the page.
protected void LinkButton1_Click(object sender, EventArgs e)
{
_manager.Personalization.ResetPersonalizationState();
}
// If not in User personalization scope, toggle into it.
protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
{
if (_manager.Personalization.Scope == PersonalizationScope.Shared)
_manager.Personalization.ToggleScope();
}
// If not in Shared scope, and if user is allowed, toggle the scope.
protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
{
if (_manager.Personalization.CanEnterSharedScope &&
_manager.Personalization.Scope == PersonalizationScope.User)
_manager.Personalization.ToggleScope();
}
</script>
<div>
<asp:Panel ID="Panel1" runat="server"
Borderwidth="1"
Width="230"
BackColor="lightgray"
Font-Names="Verdana, Arial, Sans Serif" >
<asp:Label ID="Label1" runat="server"
Text=" Display Mode"
Font-Bold="true"
Font-Size="8"
Width="120"
AssociatedControlID="DisplayModeDropdown"/>
<asp:DropDownList ID="DisplayModeDropdown" runat="server"
AutoPostBack="true"
Width="120"
OnSelectedIndexChanged="DisplayModeDropdown_SelectedIndexChanged" />
<asp:LinkButton ID="LinkButton1" runat="server"
Text="Reset User State"
ToolTip="Reset the current user's personalization data for the page."
Font-Size="8"
OnClick="LinkButton1_Click" />
<asp:Panel ID="Panel2" runat="server"
GroupingText="Personalization Scope"
Font-Bold="true"
Font-Size="8"
Visible="false" >
<asp:RadioButton ID="RadioButton1" runat="server"
Text="User"
AutoPostBack="true"
GroupName="Scope" OnCheckedChanged="RadioButton1_CheckedChanged" />
<asp:RadioButton ID="RadioButton2" runat="server"
Text="Shared"
AutoPostBack="true"
GroupName="Scope"
OnCheckedChanged="RadioButton2_CheckedChanged" />
</asp:Panel>
</asp:Panel>
</div>
<%@ control language="vb" classname="DisplayModeMenuVB"%>
<script runat="server">
' Use a field to reference the current WebPartManager.
Dim _manager As WebPartManager
Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)
AddHandler Page.InitComplete, AddressOf InitComplete
End Sub
Sub InitComplete(ByVal sender As Object, ByVal e As System.EventArgs)
_manager = WebPartManager.GetCurrentWebPartManager(Page)
Dim browseModeName As String = WebPartManager.BrowseDisplayMode.Name
' Fill the dropdown with the names of supported display modes.
Dim mode As WebPartDisplayMode
For Each mode In _manager.SupportedDisplayModes
Dim modeName As String = mode.Name
' Make sure a mode is enabled before adding it.
If mode.IsEnabled(_manager) Then
Dim item As New ListItem(modeName, modeName)
DisplayModeDropdown.Items.Add(item)
End If
Next mode
' If shared scope is allowed for this user, display the scope-switching
' UI and select the appropriate radio button for the current user scope.
If _manager.Personalization.CanEnterSharedScope Then
Panel2.Visible = True
If _manager.Personalization.Scope = PersonalizationScope.User Then
RadioButton1.Checked = True
Else
RadioButton2.Checked = True
End If
End If
End Sub
' Change the page to the selected display mode.
Sub DisplayModeDropdown_SelectedIndexChanged(ByVal sender As Object, _
ByVal e As EventArgs)
Dim selectedMode As String = DisplayModeDropdown.SelectedValue
Dim mode As WebPartDisplayMode = _
_manager.SupportedDisplayModes(selectedMode)
If Not (mode Is Nothing) Then
_manager.DisplayMode = mode
End If
End Sub
' Set the selected item equal to the current display mode.
Sub Page_PreRender(ByVal sender As Object, ByVal e As EventArgs)
Dim items As ListItemCollection = DisplayModeDropdown.Items
Dim selectedIndex As Integer = _
items.IndexOf(items.FindByText(_manager.DisplayMode.Name))
DisplayModeDropdown.SelectedIndex = selectedIndex
End Sub
' Reset all of a user's personalization data for the page.
Protected Sub LinkButton1_Click(ByVal sender As Object, _
ByVal e As EventArgs)
_manager.Personalization.ResetPersonalizationState()
End Sub
' If not in User personalization scope, toggle into it.
Protected Sub RadioButton1_CheckedChanged(ByVal sender As Object, _
ByVal e As EventArgs)
If _manager.Personalization.Scope = PersonalizationScope.Shared Then
_manager.Personalization.ToggleScope()
End If
End Sub
' If not in Shared scope, and if user is allowed, toggle the scope.
Protected Sub RadioButton2_CheckedChanged(ByVal sender As Object, _
ByVal e As EventArgs)
If _manager.Personalization.CanEnterSharedScope AndAlso _
_manager.Personalization.Scope = PersonalizationScope.User Then
_manager.Personalization.ToggleScope()
End If
End Sub
</script>
<div>
<asp:Panel ID="Panel1" runat="server"
Borderwidth="1"
Width="230"
BackColor="lightgray"
Font-Names="Verdana, Arial, Sans Serif" >
<asp:Label ID="Label1" runat="server"
Text=" Display Mode"
Font-Bold="true"
Font-Size="8"
Width="120" AssociatedControlID="DisplayModeDropDown"/>
<asp:DropDownList ID="DisplayModeDropdown" runat="server"
AutoPostBack="true"
Width="120"
OnSelectedIndexChanged="DisplayModeDropdown_SelectedIndexChanged" />
<asp:LinkButton ID="LinkButton1" runat="server"
Text="Reset User State"
ToolTip="Reset the current user's personalization data for the page."
Font-Size="8"
OnClick="LinkButton1_Click" />
<asp:Panel ID="Panel2" runat="server"
GroupingText="Personalization Scope"
Font-Bold="true"
Font-Size="8"
Visible="false" >
<asp:RadioButton ID="RadioButton1" runat="server"
Text="User"
AutoPostBack="true"
GroupName="Scope" OnCheckedChanged="RadioButton1_CheckedChanged" />
<asp:RadioButton ID="RadioButton2" runat="server"
Text="Shared"
AutoPostBack="true"
GroupName="Scope"
OnCheckedChanged="RadioButton2_CheckedChanged" />
</asp:Panel>
</asp:Panel>
</div>
Вторая часть примера кода — исходный код для двух пользовательских WebPart элементов управления. Чтобы выполнить пример кода, необходимо скомпилировать этот исходный код. Вы можете скомпилировать его явным образом и поместить полученную сборку в папку Bin веб-сайта или глобальный кэш сборок. Кроме того, исходный код можно поместить в папку App_Code сайта, где он будет динамически компилироваться во время выполнения. Пошаговое руководство, демонстрирующее оба метода компиляции, см. в разделе Пошаговое руководство. Разработка и использование пользовательского серверного веб-элемента управления.
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 UserInfoWebPart : WebPart
{
HttpServerUtility server = HttpContext.Current.Server;
private String _userNickName = "Add a nickname.";
private String _userPetName = "Add a pet's name.";
private DateTime _userSpecialDate = DateTime.Now;
private Boolean _userIsCurrent = true;
private JobTypeName _userJobType = JobTypeName.Unselected;
public enum JobTypeName
{
Unselected = 0,
Support = 1,
Service = 2,
Professional = 3,
Technical = 4,
Manager = 5,
Executive = 6
}
Label NickNameLabel;
Label PetNameLabel;
Label SpecialDateLabel;
CheckBox IsCurrentCheckBox;
Label JobTypeLabel;
// Add the Personalizable and WebBrowsable attributes to the
// public properties, so that users can save property values
// and edit them with a PropertyGridEditorPart control.
[Personalizable(), WebBrowsable, WebDisplayName("Nickname")]
public String NickName
{
get
{
object o = ViewState["NickName"];
if (o != null)
return (string)o;
else
return _userNickName;
}
set { _userNickName = server.HtmlEncode(value); }
}
[Personalizable(), WebBrowsable, WebDisplayName("Pet Name")]
public String PetName
{
get
{
object o = ViewState["PetName"];
if (o != null)
return (string)o;
else
return _userPetName;
}
set { _userPetName = server.HtmlEncode(value); }
}
[Personalizable(), WebBrowsable(), WebDisplayName("Special Day")]
public DateTime SpecialDay
{
get
{
object o = ViewState["SpecialDay"];
if (o != null)
return (DateTime)o;
else
return _userSpecialDate;
}
set { _userSpecialDate = value; }
}
[Personalizable(), WebBrowsable(), WebDisplayName("Job Type")]
public JobTypeName UserJobType
{
get
{
object o = ViewState["UserJobType"];
if (o != null)
return (JobTypeName)o;
else
return _userJobType;
}
set { _userJobType = (JobTypeName)value; }
}
[Personalizable(), WebBrowsable(), WebDisplayName("Is Current")]
public Boolean IsCurrent
{
get
{
object o = ViewState["IsCurrent"];
if (o != null)
return (Boolean)o;
else
return _userIsCurrent;
}
set { _userIsCurrent = value; }
}
protected override void CreateChildControls()
{
Controls.Clear();
NickNameLabel = new Label();
NickNameLabel.Text = this.NickName;
SetControlAttributes(NickNameLabel);
PetNameLabel = new Label();
PetNameLabel.Text = this.PetName;
SetControlAttributes(PetNameLabel);
SpecialDateLabel = new Label();
SpecialDateLabel.Text = this.SpecialDay.ToShortDateString();
SetControlAttributes(SpecialDateLabel);
IsCurrentCheckBox = new CheckBox();
IsCurrentCheckBox.Checked = this.IsCurrent;
SetControlAttributes(IsCurrentCheckBox);
JobTypeLabel = new Label();
JobTypeLabel.Text = this.UserJobType.ToString();
SetControlAttributes(JobTypeLabel);
ChildControlsCreated = true;
}
private void SetControlAttributes(WebControl ctl)
{
ctl.BackColor = Color.White;
ctl.BorderWidth = 1;
ctl.Width = 200;
this.Controls.Add(ctl);
}
protected override void RenderContents(HtmlTextWriter writer)
{
writer.Write("Nickname:");
writer.WriteBreak();
NickNameLabel.RenderControl(writer);
writer.WriteBreak();
writer.Write("Pet Name:");
writer.WriteBreak();
PetNameLabel.RenderControl(writer);
writer.WriteBreak();
writer.Write("Special Date:");
writer.WriteBreak();
SpecialDateLabel.RenderControl(writer);
writer.WriteBreak();
writer.Write("Job Type:");
writer.WriteBreak();
JobTypeLabel.RenderControl(writer);
writer.WriteBreak();
writer.Write("Current:");
writer.WriteBreak();
IsCurrentCheckBox.RenderControl(writer);
}
}
[AspNetHostingPermission(SecurityAction.Demand,
Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand,
Level = AspNetHostingPermissionLevel.Minimal)]
public class TextDisplayWebPart : WebPart
{
private String _contentText = null;
TextBox input;
Label DisplayContent;
Literal lineBreak;
[Personalizable(), WebBrowsable]
public String ContentText
{
get { return _contentText; }
set { _contentText = value; }
}
protected override void CreateChildControls()
{
Controls.Clear();
DisplayContent = new Label();
DisplayContent.BackColor = Color.LightBlue;
DisplayContent.Text = this.ContentText;
this.Controls.Add(DisplayContent);
lineBreak = new Literal();
lineBreak.Text = @"<br />";
Controls.Add(lineBreak);
input = new TextBox();
this.Controls.Add(input);
Button update = new Button();
update.Text = "Set Label Content";
update.Click += new EventHandler(this.submit_Click);
this.Controls.Add(update);
}
private void submit_Click(object sender, EventArgs e)
{
// Update the label string.
if (!string.IsNullOrEmpty(input.Text))
{
_contentText = input.Text + @"<br />";
input.Text = String.Empty;
DisplayContent.Text = this.ContentText;
}
}
}
}
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 UserInfoWebPart
Inherits WebPart
Private server As HttpServerUtility = HttpContext.Current.Server
Private _userNickName As String = "Add a nickname."
Private _userPetName As String = "Add a pet's name."
Private _userSpecialDate As DateTime = DateTime.Now
Private _userIsCurrent As [Boolean] = True
Private _userJobType As JobTypeName = JobTypeName.Unselected
Public Enum JobTypeName
Unselected = 0
Support = 1
Service = 2
Professional = 3
Technical = 4
Manager = 5
Executive = 6
End Enum
Private NickNameLabel As Label
Private PetNameLabel As Label
Private SpecialDateLabel As Label
Private IsCurrentCheckBox As CheckBox
Private JobTypeLabel As Label
' Add the Personalizable and WebBrowsable attributes to the
' public properties, so that users can save property values
' and edit them with a PropertyGridEditorPart control.
<Personalizable(), WebBrowsable(), WebDisplayName("Nickname")> _
Public Property NickName() As String
Get
Dim o As Object = ViewState("NickName")
If Not (o Is Nothing) Then
Return CStr(o)
Else
Return _userNickName
End If
End Get
Set(ByVal value As String)
_userNickName = server.HtmlEncode(value)
End Set
End Property
<Personalizable(), WebBrowsable(), WebDisplayName("Pet Name")> _
Public Property PetName() As String
Get
Dim o As Object = ViewState("PetName")
If Not (o Is Nothing) Then
Return CStr(o)
Else
Return _userPetName
End If
End Get
Set(ByVal value As String)
_userPetName = server.HtmlEncode(value)
End Set
End Property
<Personalizable(), WebBrowsable(), WebDisplayName("Special Day")> _
Public Property SpecialDay() As DateTime
Get
Dim o As Object = ViewState("SpecialDay")
If Not (o Is Nothing) Then
Return CType(o, DateTime)
Else
Return _userSpecialDate
End If
End Get
Set(ByVal value As DateTime)
_userSpecialDate = value
End Set
End Property
<Personalizable(), WebBrowsable(), WebDisplayName("Job Type")> _
Public Property UserJobType() As JobTypeName
Get
Dim o As Object = ViewState("UserJobType")
If Not (o Is Nothing) Then
Return CType(o, JobTypeName)
Else
Return _userJobType
End If
End Get
Set(ByVal value As JobTypeName)
_userJobType = CType(value, JobTypeName)
End Set
End Property
<Personalizable(), WebBrowsable(), WebDisplayName("Is Current")> _
Public Property IsCurrent() As [Boolean]
Get
Dim o As Object = ViewState("IsCurrent")
If Not (o Is Nothing) Then
Return CType(o, [Boolean])
Else
Return _userIsCurrent
End If
End Get
Set(ByVal value As [Boolean])
_userIsCurrent = value
End Set
End Property
Protected Overrides Sub CreateChildControls()
Controls.Clear()
NickNameLabel = New Label()
NickNameLabel.Text = Me.NickName
SetControlAttributes(NickNameLabel)
PetNameLabel = New Label()
PetNameLabel.Text = Me.PetName
SetControlAttributes(PetNameLabel)
SpecialDateLabel = New Label()
SpecialDateLabel.Text = Me.SpecialDay.ToShortDateString()
SetControlAttributes(SpecialDateLabel)
IsCurrentCheckBox = New CheckBox()
IsCurrentCheckBox.Checked = Me.IsCurrent
SetControlAttributes(IsCurrentCheckBox)
JobTypeLabel = New Label()
JobTypeLabel.Text = Me.UserJobType.ToString()
SetControlAttributes(JobTypeLabel)
ChildControlsCreated = True
End Sub
Private Sub SetControlAttributes(ByVal ctl As WebControl)
ctl.BackColor = Color.White
ctl.BorderWidth = 1
ctl.Width = 200
Me.Controls.Add(ctl)
End Sub
Protected Overrides Sub RenderContents(ByVal writer As HtmlTextWriter)
writer.Write("Nickname:")
writer.WriteBreak()
NickNameLabel.RenderControl(writer)
writer.WriteBreak()
writer.Write("Pet Name:")
writer.WriteBreak()
PetNameLabel.RenderControl(writer)
writer.WriteBreak()
writer.Write("Special Date:")
writer.WriteBreak()
SpecialDateLabel.RenderControl(writer)
writer.WriteBreak()
writer.Write("Job Type:")
writer.WriteBreak()
JobTypeLabel.RenderControl(writer)
writer.WriteBreak()
writer.Write("Current:")
writer.WriteBreak()
IsCurrentCheckBox.RenderControl(writer)
End Sub
End Class
<AspNetHostingPermission(SecurityAction.Demand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
<AspNetHostingPermission(SecurityAction.InheritanceDemand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
Public Class TextDisplayWebPart
Inherits WebPart
Private _contentText As String = Nothing
Private _fontStyle As String = Nothing
Private input As TextBox
Private DisplayContent As Label
Private lineBreak As Literal
<Personalizable(), WebBrowsable()> _
Public Property ContentText() As String
Get
Return _contentText
End Get
Set(ByVal value As String)
_contentText = value
End Set
End Property
Protected Overrides Sub CreateChildControls()
Controls.Clear()
DisplayContent = New Label()
DisplayContent.BackColor = Color.LightBlue
DisplayContent.Text = Me.ContentText
Me.Controls.Add(DisplayContent)
lineBreak = New Literal()
lineBreak.Text = "<br />"
Controls.Add(lineBreak)
input = New TextBox()
Me.Controls.Add(input)
Dim update As New Button()
update.Text = "Set Label Content"
AddHandler update.Click, AddressOf Me.submit_Click
Me.Controls.Add(update)
End Sub
Private Sub submit_Click(ByVal sender As Object, _
ByVal e As EventArgs)
' Update the label string.
If input.Text <> String.Empty Then
_contentText = input.Text + "<br />"
input.Text = String.Empty
DisplayContent.Text = Me.ContentText
End If
End Sub
End Class
End Namespace
Третья часть примера — веб-страница, содержащая PageCatalogPart элемент управления . Обратите внимание, что Button2_Click
метод получает описания WebPart элементов управления в каталоге, вызывает GetWebPart метод для получения всех элементов управления в каталоге страниц для коллекции, а затем добавляет эти элементы управления обратно на страницу.
<%@ page language="c#" %>
<%@ register TagPrefix="uc1"
TagName="DisplayModeMenuCS"
Src="DisplayModeMenuCS.ascx" %>
<%@ register tagprefix="aspSample"
Namespace="Samples.AspNet.CS.Controls"
Assembly="UserInfoWebPartCS" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
Button1.Visible = false;
Button2.Visible = false;
Label1.Visible = false;
}
// <snippet3>
protected void Button1_Click(object sender, EventArgs e)
{
WebPartDescriptionCollection descriptions =
PageCatalogPart1.GetAvailableWebPartDescriptions();
StringBuilder descriptionContent = new StringBuilder();
foreach (WebPartDescription description in descriptions)
{
descriptionContent.AppendLine("<div><br /><strong>" + description.Title +
"</strong><br />");
descriptionContent.AppendLine(" ID: " + description.ID + "<br />");
descriptionContent.AppendLine(" Description: " +
description.Description + "<br /></div><hr />");
}
Label1.Text = "<h3>Catalog Contents</h3>" + descriptionContent.ToString();
}
// </snippet3>
// <snippet4>
protected void Button2_Click(object sender, EventArgs e)
{
WebPartDescriptionCollection descriptions =
PageCatalogPart1.GetAvailableWebPartDescriptions();
if(descriptions.Count > 0)
{
ArrayList partList = new ArrayList();
// Add the WebPart controls to a collection before you call
// AddWebPart on the WebPartManager. If you try to add the
// controls directly by using AddWebPart, the WebPartAdded
// event fires each time you call AddWebPart, and it destroys
// the collection of descriptions before you finish adding
// all the WebPart controls.
foreach(WebPartDescription description in descriptions)
{
WebPart partToAdd =
PageCatalogPart1.GetWebPart(description);
partList.Add(partToAdd);
}
foreach(WebPart part in partList)
{
WebPartManager1.AddWebPart(part, zone1, 0);
}
}
}
// </snippet4>
protected void PageCatalogPart1_PreRender(object sender,
EventArgs e)
{
Button1.Visible = true;
Button2.Visible = true;
Label1.Visible = true;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>
DeclarativeCatalogPart Control
</title>
</head>
<body>
<form id="form1" runat="server">
<asp:webpartmanager id="WebPartManager1" runat="server" />
<uc1:DisplayModeMenuCS ID="DisplayModeMenu1" runat="server" />
<asp:webpartzone id="zone1" runat="server" >
<PartTitleStyle BorderWidth="1"
Font-Names="Verdana, Arial"
Font-Size="110%"
BackColor="LightBlue" />
<zonetemplate>
<asp:BulletedList ID="BulletedList1"
Runat="server"
DisplayMode="HyperLink"
Title="Favorites">
<asp:ListItem Value="http://msdn.microsoft.com">
MSDN
</asp:ListItem>
<asp:ListItem Value="http://www.asp.net">
ASP.NET
</asp:ListItem>
<asp:ListItem Value="http://www.msn.com">
MSN
</asp:ListItem>
</asp:BulletedList>
</zonetemplate>
</asp:webpartzone>
<div>
<hr />
<asp:Button ID="Button1" runat="server"
Text="Display WebPart descriptions"
OnClick="Button1_Click" />
<br />
<asp:Button ID="Button2" runat="server"
Text="Add WebPart Controls" OnClick="Button2_Click" />
<asp:Label ID="Label1" runat="server" Text="" />
</div>
<asp:CatalogZone ID="CatalogZone1" runat="server">
<ZoneTemplate>
<asp:PageCatalogPart ID="PageCatalogPart1" runat="server"
OnPreRender="PageCatalogPart1_PreRender" />
<asp:DeclarativeCatalogPart ID="DeclarativeCatalogPart1"
runat="server"
Description="Contains a user control with Web Parts and
an ASP.NET Calendar control." >
<WebPartsTemplate>
<asp:Calendar ID="Calendar1" runat="server"
Title="My Calendar"
Description="ASP.NET Calendar control used as a personal
calendar." />
<aspSample:UserInfoWebPart
runat="server"
id="userinfo1"
title = "User Information WebPart"
Description ="Contains custom, editable user information
for display on a page." />
<aspSample:TextDisplayWebPart
runat="server"
id="TextDisplayWebPart1"
title = "Text Display WebPart"
Description="Contains a label where users can dynamically
update the text." />
</WebPartsTemplate>
</asp:DeclarativeCatalogPart>
</ZoneTemplate>
</asp:CatalogZone>
</form>
</body>
</html>
<%@ page language="VB" Debug="true" %>
<%@ register TagPrefix="uc1"
TagName="DisplayModeMenuVB"
Src="DisplayModeMenuVB.ascx" %>
<%@ register tagprefix="aspSample"
Namespace="Samples.AspNet.VB.Controls"
Assembly="UserInfoWebPartVB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, _
ByVal e As System.EventArgs)
Button1.Visible = False
Button2.Visible = False
Label1.Visible = False
End Sub
' <snippet3>
Shared editControlTitle As String
Protected Sub Button1_Click(ByVal sender As Object, _
ByVal e As System.EventArgs)
Dim descriptions As WebPartDescriptionCollection = _
PageCatalogPart1.GetAvailableWebPartDescriptions()
Dim descriptionContent As StringBuilder = New StringBuilder()
Dim description As WebPartDescription
For Each description In descriptions
descriptionContent.AppendLine("<div><br /><strong>" + _
description.Title + "</strong><br />")
descriptionContent.AppendLine(" ID: " + _
description.ID + "<br />")
descriptionContent.AppendLine(" Description: " + _
description.Description + "<br /></div><hr />")
Next description
Label1.Text = "<h3>Catalog Contents</h3>" + descriptionContent.ToString()
End Sub
' </snippet3>
' <snippet4>
Protected Sub Button2_Click(ByVal sender As Object, _
ByVal e As System.EventArgs)
Dim descriptions As WebPartDescriptionCollection = _
PageCatalogPart1.GetAvailableWebPartDescriptions()
If descriptions.Count > 0 Then
Dim partList As ArrayList = New ArrayList()
Dim description As WebPartDescription
Dim part As WebPart
' Add the WebPart controls to a collection before you call
' AddWebPart on the WebPartManager. If you try to add the
' controls directly by using AddWebPart, the WebPartAdded
' event fires each time you call AddWebPart, and it destroys
' the collection of descriptions before you finish adding
' all the WebPart controls.
For Each description In descriptions
Dim partToAdd As WebPart = _
PageCatalogPart1.GetWebPart(description)
partList.Add(partToAdd)
Next
For Each part In partList
WebPartManager1.AddWebPart(part, zone1, 0)
Next
End If
End Sub
' </snippet4>
Protected Sub PageCatalogPart1_PreRender(ByVal _
sender As Object, ByVal e As System.EventArgs)
Button1.Visible = True
Button2.Visible = True
Label1.Visible = True
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>
DeclarativeCatalogPart Control
</title>
</head>
<body>
<form id="form1" runat="server">
<asp:webpartmanager id="WebPartManager1" runat="server" />
<uc1:DisplayModeMenuVB ID="DisplayModeMenu1" runat="server" />
<asp:webpartzone id="zone1" runat="server" >
<PartTitleStyle BorderWidth="1"
Font-Names="Verdana, Arial"
Font-Size="110%"
BackColor="LightBlue" />
<zonetemplate>
<asp:BulletedList ID="BulletedList1"
Runat="server"
DisplayMode="HyperLink"
Title="Favorites">
<asp:ListItem Value="http://msdn.microsoft.com">
MSDN
</asp:ListItem>
<asp:ListItem Value="http://www.asp.net">
ASP.NET
</asp:ListItem>
<asp:ListItem Value="http://www.msn.com">
MSN
</asp:ListItem>
</asp:BulletedList>
</zonetemplate>
</asp:webpartzone>
<div>
<hr />
<asp:Button ID="Button1" runat="server"
Text="Display WebPart descriptions"
OnClick="Button1_Click" />
<br />
<asp:Button ID="Button2" runat="server"
Text="Add WebPart Controls" OnClick="Button2_Click" />
<asp:Label ID="Label1" runat="server" Text="" />
</div>
<asp:CatalogZone ID="CatalogZone1" runat="server">
<ZoneTemplate>
<asp:PageCatalogPart ID="PageCatalogPart1" runat="server"
OnPreRender="PageCatalogPart1_PreRender" />
<asp:DeclarativeCatalogPart ID="DeclarativeCatalogPart1"
runat="server"
Description="Contains a user control with Web Parts and
an ASP.NET Calendar control." >
<WebPartsTemplate>
<asp:Calendar ID="Calendar1" runat="server"
Title="My Calendar"
Description="ASP.NET Calendar control used as a personal
calendar." />
<aspSample:UserInfoWebPart
runat="server"
id="userinfo1"
title = "User Information WebPart"
Description ="Contains custom, editable user information
for display on a page." />
<aspSample:TextDisplayWebPart
runat="server"
id="TextDisplayWebPart1"
title = "Text Display WebPart"
Description="Contains a label where users can dynamically
update the text." />
</WebPartsTemplate>
</asp:DeclarativeCatalogPart>
</ZoneTemplate>
</asp:CatalogZone>
</form>
</body>
</html>
При загрузке страницы в браузере выберите Режим каталога в раскрывающемся списке Режим отображения , чтобы переключиться в режим каталога. В режиме каталога можно просмотреть элементы управления, доступные для добавления на страницу. Добавьте один или несколько элементов управления на страницу, а затем используйте элемент управления раскрывающимся списком Режим отображения , чтобы вернуть страницу в режим просмотра. Щелкните меню глаголов (стрелка вниз) в строке заголовка одного или нескольких элементов управления и нажмите кнопку Закрыть. Верните страницу в режим каталога и обратите внимание, что закрытые элементы управления отображаются в каталоге страниц и доступны для добавления обратно на страницу. Нажмите кнопку Add WebPart Controls (Добавить элементы управления веб-части ), чтобы добавить элементы управления в каталоге страницы обратно на страницу. Используйте элемент управления раскрывающимся списком Режим отображения , чтобы вернуть страницу в обычный режим просмотра; Добавленные элементы управления отображаются на странице.
Комментарии
Метод GetWebPart возвращает ссылку на элемент управления, WebPart сведения о описании которого соответствуют значениям объекта, WebPartDescription переданного в метод . Как правило, этот метод используется вместе с методом GetWebPart , который используется для получения описаний всех элементов управления в каталоге. Затем отдельные WebPart элементы управления можно извлекать или управлять ими по мере необходимости, передавая отдельные WebPartDescription объекты в GetWebPart метод .
Применяется к
См. также раздел
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