SPFieldCollection Class (Microsoft.SharePoint)

Represents a collection of SPField objects.

Namespace: Microsoft.SharePoint
Assembly: Microsoft.SharePoint (in microsoft.sharepoint.dll)

Syntax

Visual Basic (Declaration)

<DefaultMemberAttribute("Item")> _
<SharePointPermissionAttribute(SecurityAction.InheritanceDemand, ObjectModel:=True)> _
<SharePointPermissionAttribute(SecurityAction.LinkDemand, ObjectModel:=True)> _
Public Class SPFieldCollection
    Inherits SPBaseCollection

Visual Basic (Usage)

Dim instance As SPFieldCollection

[DefaultMemberAttribute("Item")] 
[SharePointPermissionAttribute(SecurityAction.InheritanceDemand, ObjectModel=true)] 
[SharePointPermissionAttribute(SecurityAction.LinkDemand, ObjectModel=true)] 
public class SPFieldCollection : SPBaseCollection

Remarks

Use the Fields property of either the SPList class or the SPListItem class to return the collection of fields for a list or list item. Use the Fields property of the SPWeb class to return the fields in the Web site, and use the Fields property of the SPContentType class to get the fields that are associated with the content type. To create a field, use the Add method.

Use an indexer to return a single field from the collection. For example, assuming the collection has been assigned to a variable named collFields, use collFields[index] in Microsoft C#, or collFields(index) in Microsoft Visual Basic, where index is either the index number of the field in the collection or the display name of the field.

Example

The following code example adds a new text field to the Announcements list of a specified Web site that is displayed in the default view of the list.

Visual Basic

Dim webSite As SPWeb = SPContext.Current.Site.AllWebs("MySite")
Try
    Dim list As SPList = webSite.GetList("Lists/Announcements/AllItems.aspx")
    Dim fields As SPFieldCollection = list.Fields

    Dim newFieldName As String = fields.Add("MyNewField", SPFieldType.Text, False)

    Dim fieldAdd As SPField = fields.GetField(newFieldName)

    Dim view As SPView = list.DefaultView
    Dim viewFields As SPViewFieldCollection = view.ViewFields
    viewFields.Add(fieldAdd)
    view.Update()
Finally
    webSite.Dispose()
End Try

using (SPWeb oWebsite = SPContext.Current.Site.AllWebs["MySite"])
{
    SPList oList = oWebsite.GetList("Lists/Announcements/AllItems.aspx");
    SPFieldCollection collFields = oList.Fields;

    string strNewFieldName = collFields.Add("MyNewField", SPFieldType.Text, false);
    SPField oField = collFields.GetField(strNewFieldName);

    SPView oView = oList.DefaultView;
    SPViewFieldCollection collViewFields = oView.ViewFields;
    collViewFields.Add(oField);
    oView.Update();
}

Note:
Certain objects implement the IDisposable interface, and you must avoid retaining these objects in memory after they are no longer needed. For information about good coding practices, see Best Practices: Using Disposable Windows SharePoint Services Objects.

Inheritance Hierarchy

System.Object
   Microsoft.SharePoint.Administration.SPAutoSerializingObject
     Microsoft.SharePoint.SPBaseCollection
      Microsoft.SharePoint.SPFieldCollection

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Reference

SPFieldCollection Members
Microsoft.SharePoint Namespace