SPField.Update method

Updates the database with changes that are made to the field.

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

'Declaration
Public Overridable Sub Update
'Usage
Dim instance As SPField

instance.Update()

public virtual void Update()

The following code example updates the display name, default value, and description for the specified field.

Dim siteCollection As SPSite = SPContext.Current.Site
Dim list As SPList = 
    siteCollection.AllWebs("Site_Name").Lists("List_Name")
Dim field As SPField = list.Fields("Field_Name")

field.DefaultValue = "Default_Value"
field.Description = "Description"
field.Title = "New_Field_Title"

field.Update() 

SPSite oSiteCollection = SPContext.Current.Site;
SPList oList = 
    oSiteCollection.AllWebs["Site_Name"].Lists["List_Name"];
SPField oField = oList.Fields["Field_Name"];

oField.DefaultValue = "Default_Value";
oField.Description = "Description";
oField.Title = "New_Field_Title";

oField.Update();

SPField class

SPField members

Update overload

Microsoft.SharePoint namespace