SPContentType.Update method (Boolean)
Updates the content type definition that is stored in the database and, optionally, updates all content types that inherit from this content type.
Namespace: Microsoft.SharePoint
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Syntax
'Declaration
Public Sub Update ( _
updateChildren As Boolean _
)
'Usage
Dim instance As SPContentType
Dim updateChildren As Boolean
instance.Update(updateChildren)
public void Update(
bool updateChildren
)
Parameters
updateChildren
Type: System.Booleantrue to push the changes made to the content type down to content types that inherit from it; otherwise, false.
Exceptions
| Exception | Condition |
|---|---|
| SPContentTypeSealedException | The Sealed property of this content type or of a child of this content type has a value of true. |
| SPContentTypeReadOnlyException | The ReadOnly property of this content type or of a child of this content type has a value of true. |
Remarks
As you make changes to a site content type through the object model, your code is actually making those changes to the in-memory representation of the site content type. Only when you call the Update method does SharePoint Foundation make those changes permanent, by committing them back to the content type definition that is stored in the site database.
For more information, see Updating Content Types.
When you make changes to a site content type, you can choose to propagate, or push down, changes made to the parent content type to its child site and list content types.
For more information, see Updating Child Content Types.
Examples
The following example is a console application that creates a field link by using an existing site column, adds it to a site content type, and then updates the content type without propagating the change to its child content types.
Imports System
Imports Microsoft.SharePoint
Module ConsoleApp
Sub Main()
Dim site As SPSite = New SPSite("https://localhost")
Try
Dim web As SPWeb = site.OpenWeb()
Try
Dim ctName As String = "Contact" ' Content type to modify
Dim fldName As String = "Birthday" ' Site field to link to
' Get the content type to modify.
Dim ct As SPContentType = web.ContentTypes(ctName) ' Null if not found
If ct Is Nothing Then
Console.WriteLine("{0} is not a site content type.", ctName)
End If
' Get the field to link to.
Dim fld As SPField = Nothing
Try
fld = web.Fields.GetField(fldName) ' Throws exception if not found
Catch ex As ArgumentException
Console.WriteLine("{0} is not a site column.")
End Try
' Add a field link to the content type.
If Nothing IsNot fld AndAlso Nothing IsNot ct Then
Dim lnk As New SPFieldLink(fld)
If Nothing Is ct.FieldLinks(lnk.Id) Then ' Does it exist in collection?
'No, so add it.
ct.FieldLinks.Add(lnk)
' Update the content type.
Try
ct.Update(False) ' Do not push down
Console.WriteLine("A link to {0} has been added to content type {1}.", fldName, ctName)
Catch ex As SPException
Console.Write("Update failed. ")
Console.WriteLine(ex.Message)
End Try
Else ' We have a duplicate link
Console.WriteLine("Content type {0} already has a link to {1}.", ctName, fldName)
End If
End If
Finally
web.Dispose()
End Try
Finally
site.Dispose()
End Try
Console.Write(vbCrLf + "Press ENTER to continue...")
Console.ReadLine()
End Sub
End Module
using System;
using Microsoft.SharePoint;
namespace Test
{
class ConsoleApp
{
static void Main(string[] args)
{
using (SPSite site = new SPSite("https://localhost"))
{
using (SPWeb web = site.OpenWeb())
{
string ctName = "Contact"; // Content type to modify
string fldName = "Birthday"; // Site field to link to
// Get the content type to modify.
SPContentType ct = web.ContentTypes[ctName]; // Null if not found
if (ct == null)
Console.WriteLine("{0} is not a site content type.", ctName);
// Get the field to link to.
SPField fld = null;
try
{
fld = web.Fields.GetField(fldName); // Throws exception if not found
}
catch (ArgumentException ex)
{
Console.WriteLine("{0} is not a site column.");
}
// Add a field link to the content type.
if (null != fld && null != ct)
{
SPFieldLink lnk = new SPFieldLink(fld);
if (null == ct.FieldLinks[lnk.Id]) // Does it exist in collection?
{
//No, so add it.
ct.FieldLinks.Add(lnk);
// Update the content type
try
{
ct.Update(false); // Do not push down
Console.WriteLine("A link to {0} has been added to content type {1}.", fldName, ctName);
}
catch (SPException ex)
{
Console.Write("Update failed. ");
Console.WriteLine(ex.Message);
}
}
else // We have a duplicate link.
{
Console.WriteLine("Content type {0} already has a link to {1}.", ctName, fldName);
}
}
}
}
Console.Write("\nPress ENTER to continue...");
Console.ReadLine();
}
}
}
See also
Reference
Microsoft.SharePoint namespace