TaxonomyField-Klasse
Stellt ein Taxonomiefeld dar.
Vererbungshierarchie
System.Object
Microsoft.SharePoint.SPField
Microsoft.SharePoint.SPFieldLookup
Microsoft.SharePoint.Taxonomy.TaxonomyField
Namespace: Microsoft.SharePoint.Taxonomy
Assembly: Microsoft.SharePoint.Taxonomy (in Microsoft.SharePoint.Taxonomy.dll)
Syntax
'Declaration
<SharePointPermissionAttribute(SecurityAction.InheritanceDemand, ObjectModel := True)> _
<SharePointPermissionAttribute(SecurityAction.LinkDemand, ObjectModel := True)> _
Public Class TaxonomyField _
Inherits SPFieldLookup
'Usage
Dim instance As TaxonomyField
[SharePointPermissionAttribute(SecurityAction.InheritanceDemand, ObjectModel = true)]
[SharePointPermissionAttribute(SecurityAction.LinkDemand, ObjectModel = true)]
public class TaxonomyField : SPFieldLookup
Hinweise
Die TaxonomyField-Klasse ist eine benutzerdefinierte Feld-Klasse, die von der SPFieldLookup -Klasse erbt. Wenn Sie die Eigenschaften der TaxonomyField -Klasse festlegen, rufen Sie die Update() -Methode für Änderungen in der Datenbank wirksam.
Die TaxonomyFieldValue -Klasse enthält den Feldwert für die TaxonomyField -Klasse.
Das TaxonomyFieldControl -Objekt oder der TaxonomyWebTaggingControl -Objekt-Steuerelemente können ein Objekt TaxonomyField gerendert.
Beispiele
using System;
using System.IO;
using System.Globalization;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Taxonomy;
namespace Microsoft.SDK.SharePointServer.Samples
{
/// <summary>
/// This project requires the Microsoft.SharePoint.dll and the Microsoft.SharePoint.Taxonomy.dll as
/// references in order to work.
/// </summary>
internal partial class TestTaxonomy
{
/// <summary>
/// This method will create a TaxonomyField on the given list and is bound
/// to the given term set and has the name columnName
/// </summary>
private void TestTaxonomyFieldCreate(SPList list, TermSet termSet, string columnName)
{
if (list == null)
{
throw new ArgumentException("Parameter list cannot be null");
}
if (termSet == null)
{
throw new ArgumentException("Parameter termSet cannot be null");
}
// The constructor is not actually used
TaxonomyField taxonomyField = list.Fields.CreateNewField("TaxonomyFieldType", columnName) as TaxonomyField;
// Sets whether the field accepts multiple values or not
taxonomyField.AllowMultipleValues = false;
// If this is set to a GUID of a term only terms that are descendants of the term can
// be picked
taxonomyField.AnchorId = Guid.Empty;
// If this is set to true terms that are not validated will be created
taxonomyField.CreateValuesInEditForm = false;
// If this is set to true the user will be given the option to add new terms
taxonomyField.Open = false;
// Id of the term store
taxonomyField.SspId = termSet.TermStore.Id;
// If this is set to a URL the items will link to that URL on display
taxonomyField.TargetTemplate = string.Empty;
// This assumes you have a group and term set created. Normally you would pick the specific termset you want
taxonomyField.TermSetId = termSet.Id;
// After creating the taxonomy field you have to add it to the list
list.Fields.Add(taxonomyField);
Console.WriteLine("Field created");
}
/// <summary>
/// This method will update an SPListItem taxonomy field with the given term
/// </summary>
private void TestTaxonomyFieldUpdateFieldItem(Term term, SPListItem item, TaxonomyField taxonomyField)
{
if (taxonomyField == null)
{
throw new ArgumentException("Parameter taxonomyField cannot be null");
}
if (term == null)
{
throw new ArgumentException("Parameter term cannot be null");
}
if (item == null)
{
throw new ArgumentException("Parameter item cannot be null");
}
if (item.Fields.Contains(taxonomyField.Id))
{
taxonomyField.SetFieldValue(item, term, CultureInfo.CurrentUICulture.LCID);
}
else
{
throw new ArgumentException("taxonomyField must exist on the list that item is from");
}
// Finally we have to actually update the item.
item.Update();
Console.WriteLine("Field updated with value " + term.Name);
}
/// <summary>
/// This method will clear an SPListItem taxonomy field
/// </summary>
private void TestTaxonomyFieldClearFieldItem(SPListItem item, TaxonomyField taxonomyField)
{
if (taxonomyField == null)
{
throw new ArgumentException("Parameter taxonomyField cannot be null");
}
if (item == null)
{
throw new ArgumentException("Parameter item cannot be null");
}
if (item.Fields.Contains(taxonomyField.Id))
{
if (taxonomyField.AllowMultipleValues)
{
TaxonomyFieldValueCollection taxCollection = new TaxonomyFieldValueCollection(taxonomyField);
taxonomyField.SetFieldValue(item, taxCollection);
}
else
{
TaxonomyFieldValue taxValue = new TaxonomyFieldValue(taxonomyField);
taxonomyField.SetFieldValue(item, taxValue);
}
// Finally we have to actually update the item.
item.Update();
Console.WriteLine("Field cleared");
}
else
{
throw new ArgumentException("taxonomyField must exist on the list that item is from");
}
}
/// <summary>
/// This method will write out to the console the HTML value of the taxonomy field on the given
/// SPListItem
/// </summary>
private void TestGetFieldValueAsHtml(SPListItem item, TaxonomyField taxonomyField)
{
if (taxonomyField == null)
{
throw new ArgumentException("Parameter taxonomyField cannot be null");
}
if (item == null)
{
throw new ArgumentException("Parameter item cannot be null");
}
if (item.Fields.Contains(taxonomyField.Id))
{
Console.WriteLine("The value as HTML is " + taxonomyField.GetFieldValueAsHtml(item[taxonomyField.Id]));
}
else
{
throw new ArgumentException("taxonomyField must exist on the list that item is from");
}
}
/// <summary>
/// This method will write out to the console the text value of the taxonomy field on the given
/// SPListItem
/// </summary>
private void TestGetFieldValueAsText(SPListItem item, TaxonomyField taxonomyField)
{
if (taxonomyField == null)
{
throw new ArgumentException("Parameter taxonomyField cannot be null");
}
if (item == null)
{
throw new ArgumentException("Parameter item cannot be null");
}
if (item.Fields.Contains(taxonomyField.Id))
{
Console.WriteLine("The value as text is " + taxonomyField.GetFieldValueAsText(item[taxonomyField.Id]));
}
else
{
throw new ArgumentException("taxonomyField must exist on the list that item is from");
}
}
/// <summary>
/// This method will write out to the console the Wss Id values of the taxonomy term
/// on the given SPSite for the Enterprise Keywords
/// </summary>
private void TestGetWssIdsOfKeywordTerm(SPSite site, Term term)
{
if (term == null)
{
throw new ArgumentException("Parameter term cannot be null");
}
if (site == null)
{
throw new ArgumentException("Parameter site cannot be null");
}
// We are trying to get all the Wss Id's of this term when used as a keyword
int[] wssIds = TaxonomyField.GetWssIdsOfKeywordTerm(site, term.Id, 500);
Console.Write("The wss ID's of your term are");
if (wssIds.Length == 0)
{
Console.Write(" empty");
}
else
{
foreach (int wssId in wssIds)
{
Console.WriteLine(" " + wssId.ToString());
}
}
Console.WriteLine(".");
}
/// <summary>
/// This method will write out to the console the Wss Id values of the taxonomy term
/// on the given SPSite
/// </summary>
private void TestGetWssIdsOfTerm(SPSite site, Term term)
{
if (term == null)
{
throw new ArgumentException("Parameter term cannot be null");
}
if (site == null)
{
throw new ArgumentException("Parameter site cannot be null");
}
// We are trying to get all the Wss Id's of this term without it's children
int[] wssIds = TaxonomyField.GetWssIdsOfTerm(site, term.TermStore.Id, term.TermSet.Id, term.Id, false /*includeDescendants*/, 500);
Console.Write("The wss ID's of your term are");
if (wssIds.Length == 0)
{
Console.Write(" empty");
}
else
{
foreach (int wssId in wssIds)
{
Console.Write(" " + wssId.ToString());
}
}
Console.WriteLine(".");
}
}
}
Threadsicherheit
Alle öffentlichen static (Shared in Visual Basic) Member dieses Typs sind threadsicher. Die Threadsicherheit von Instanzmembern ist nicht gewährleistet.