WebPart-Klasse

Artikel
06.05.2015

Stellt die Basisklasse für Microsoft SharePoint Foundation Webparts erstellen.

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Namespace: Microsoft.SharePoint.WebPartPages
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)

Syntax

'Declaration
<SupportsAttributeMarkupAttribute(False)> _
<AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _
<AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level := AspNetHostingPermissionLevel.Minimal)> _
Public MustInherit Class WebPart _
    Inherits WebPart _
    Implements INamingContainer, IAttributeAccessor, IConnectionData
'Usage
Dim instance As WebPart

[SupportsAttributeMarkupAttribute(false)]
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public abstract class WebPart : WebPart, 
    INamingContainer, IAttributeAccessor, IConnectionData

Hinweise

Der Webpartinfrastruktur SharePoint Foundation entwickelt und entwickelt, damit Sie auf der Basis der Webpartinfrastruktur Microsoft ASP.NET liegen. Webparts, die von WebPart erben Microsoft SharePoint Foundation (mit Ausnahme der Benutzersteuerelemente als generische Webparts) werden vollständig unterstützt und können verwendet werden, nicht nur in ASP.NET Anwendungen, sondern auch in SharePoint Foundation Anwendungen, ob SharePoint Foundation oder nicht beteiligt ist. Die SharePoint FoundationWebPart -Klasse ist Teil einer Infrastruktur, die speziell für die SharePoint-Websites entwickelt wurde, und Webparts, die von dieser Klasse erben können nur in SharePoint-Websites verwendet werden.

When creating new Web Parts, you have the option of creating Web Parts that inherit from System.Web.UI.WebControls.WebParts.WebPart (recommended) or Microsoft.SharePoint.WebPartPages.WebPart. The SharePoint FoundationWebPart class exists primarily for the purpose of backward compatibility and to provide a small set of features that are not available in the System.Web.UI.WebControls.WebParts.WebPart class.

Der Satz von ausschließlich vom Microsoft.SharePoint.WebPartPages.WebPart bereitgestellten Features lautet wie folgt:

Seitenübergreifende Verbindungen
Verbindungen zwischen Webparts, die sich außerhalb einer Zone befinden
Clientseitige Verbindungen (Web Part Page Services Component, WPSC)
Infrastruktur, einschließlich der Möglichkeit zum Cache mit der Datenbank Zwischenspeichern von Daten

For more information, see Windows SharePoint Services and Web Parts.

Beispiele

The following code example shows a simple Web Part that contains HtmlButton and HtmlInputText controls that allow the user to change the Web Part's Title property. For a step-by-step walkthrough of creating this Web Part, see Walkthrough: Creating a Basic SharePoint Web Part.

Imports System
Imports System.ComponentModel
Imports System.Runtime.InteropServices
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Xml.Serialization
Imports Microsoft.SharePoint
Imports Microsoft.SharePoint.WebPartPages
Imports Microsoft.SharePoint.Utilities
Imports System.Web.UI.HtmlControls

Namespace WebPartLibrary1
   ' This Web Part changes it's own title and implements a custom property.
   <XmlRoot([Namespace] := "WebPartLibrary1")>  _
   Public Class SimpleWebPart
      Inherits WebPart
      Private Const defaultText As String = "hello"
      Private [text] As String = defaultText

      ' Declare variables for HtmlControls user interface elements.
      Private _mybutton As HtmlButton
      Private _mytextbox As HtmlInputText      

      ' Event handler for _mybutton control that sets the
      ' Title property to the value in _mytextbox control.
      Public Sub _mybutton_click(sender As Object, e As EventArgs)
         Me.Title = _mytextbox.Value
         Try
            Me.SaveProperties = True
         Catch Else
            Caption = "Error... Could not save property."
         End Try
      End Sub      

      ' Override the ASP.NET Web.UI.Controls.CreateChildControls 
      ' method to create the objects for the Web Part's controls.      
      Protected Overrides Sub CreateChildControls()
         ' Create _mytextbox control.
         _mytextbox = New HtmlInputText()
         _mytextbox.Value = ""
         Controls.Add(_mytextbox)

         ' Create _mybutton control and wire its event handler.
         _mybutton = New HtmlButton()
         _mybutton.InnerText = "Set Web Part Title"
         AddHandler _mybutton.ServerClick, AddressOf _mybutton_click
         Controls.Add(_mybutton)
      End Sub      

      <Browsable(True), Category("Miscellaneous"), DefaultValue(defaultText), WebPartStorage(Storage.Personal), FriendlyName("Text"), Description("Text Property")>  _
      Public Property [Text]() As String
         Get
            Return [text]
         End Get

         Set
            [text] = value
         End Set
      End Property      

      Protected Overrides Sub RenderWebPart(output As HtmlTextWriter)
         RenderChildren(output)
         ' Securely write out HTML
         output.Write(("<BR>Text Property: " + SPEncode.HtmlEncode([Text])))
      End Sub
   End Class
End Namespace

//--------------------------------------------------------------------
// File: SimpleWebPart.cs
//
// Purpose: A sample Web Part that demonstrates how to create a basic
// Web Part.
//--------------------------------------------------------------------

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Serialization;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebPartPages;
using Microsoft.SharePoint.Utilities;
using System.Web.UI.HtmlControls;

namespace WebPartLibrary1
{
    /// <summary>
    /// This Web Part changes its title and implements a custom property.
    /// </summary>
    [XmlRoot(Namespace="WebPartLibrary1")]    
    public class SimpleWebPart : WebPart
    {
        private const string defaultText = "hello";
        private string text=defaultText;

        // Declare variables for HtmlControls user interface elements.
        HtmlButton _mybutton;
        HtmlInputText _mytextbox;

        // Event handler for _mybutton control that sets the
        // Title property to the value in _mytextbox control.
        public void _mybutton_click (object sender, EventArgs e)
        {
            this.Title = _mytextbox.Value;
            try
            {
                this.SaveProperties=true;
            }
            catch
            {
                Caption = "Error... Could not save property.";
            }
        }

        // Override the ASP.NET Web.UI.Controls.CreateChildControls 
        // method to create the objects for the Web Part's controls.      
        protected override void CreateChildControls ()
        {         
            // Create _mytextbox control.
            _mytextbox = new HtmlInputText();
            _mytextbox.Value="";
            Controls.Add(_mytextbox);

            // Create _mybutton control and wire its event handler.
            _mybutton = new HtmlButton();
            _mybutton.InnerText = "Set Web Part Title";
            _mybutton.ServerClick += new EventHandler (_mybutton_click);
            Controls.Add (_mybutton);
        }

        [Browsable(true),Category("Miscellaneous"),
        DefaultValue(defaultText),
        WebPartStorage(Storage.Personal),
        FriendlyName("Text"),Description("Text Property")]
        public string Text
        {
            get
            {
                return text;
            }

            set
            {
                text = value;
            }
        }

        protected override void RenderWebPart(HtmlTextWriter output)
        {
            RenderChildren(output);
            // Securely write out HTML
            output.Write("<BR>Text Property: " + SPEncode.HtmlEncode(Text));    
        }
    }
}

Threadsicherheit

Alle öffentlichen static (Shared in Visual Basic) Member dieses Typs sind threadsicher. Die Threadsicherheit von Instanzmembern ist nicht gewährleistet.

Siehe auch

Referenz

WebPart-Member

Microsoft.SharePoint.WebPartPages-Namespace

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Hinweise

Beispiele

Threadsicherheit

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Referenz

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