Sharepoint 2010 - make Title, Description and Keyword fields as required fields in Picture Library using server-object-model

Question

I'm creating a Sharepoint feature, this feature has an event receiver associated to it. In the event receiver, I'm creating a Document Library and Picture Library using server-side object model. I'm also adding new custom columns (around 80) to these newly created document and picture library. Now I want to modify the properties of the Description, Keywords and Title fields that are by default created along with the picture library. I want to make these fields as Required fields. How do I do this? I tried to set SPList.AllowContentTypes = true and try to change the attributes of these fields, but it doesn't work (neither gives an error nor makes these required fields). I also tried to access the content types and try to change the attributes using SPContentType.FieldsLinks["Column_name"].Required and SPContentType.Fields["Column_name"].Required but it gives me an error. Does anyone have any other suggestions?

You need to set these fields as required for the **list**. So try to get the SPField from the list and set `SPField.Required` to `true` — Dennis G, Nov 03 '11 at 08:20
no luck, these are not the fields that I created. they come with the Picture Library definition. I tried different ways to get references to SPField, but nothing worked so far... — xgencoder, Nov 03 '11 at 08:30

score 2 · Accepted Answer · answered Nov 04 '11 at 03:54

Here is the answer....

SPContentType ct = mypiclib.ContentTypes["Picture"];
SPFieldLinks titleLink = ct.FieldLinks["Title"];
SPFieldLinks descLink = ct.FieldLinks["comments"]; //internal name of Description
SPFieldLinks keywords = ct.FieldLinks["keywords"];
titlelink.Required = true;
descLink.Required = true;
keywords.Required = true;
ct.Update();

score 0 · Answer 2 · answered Nov 03 '11 at 12:03

0

can you tell us the error you got when trying to use the fieldlinks? Because this should work... I have done it like this:

SPContentType ct = web.Lists["*ListName*"].ContentTypes["*ContentTypeName*"];
SPFieldLinkCollection flinks = ct.FieldLinks;
flinks["*ColumnName*"].Required = true;
ct.update();

answered Nov 03 '11 at 12:03

Tjassens

922
6
9

tried, it complains that Description field is not available in picture library... It actually exist, not sure how to handle Description field. – xgencoder Nov 03 '11 at 13:34

Pedro Fonseca · Answer 3 · 2011-11-03T19:06:05.200

0

This should do the trick:

SPWeb yourWeb =  ... //assign your web
SPList yourPictureLibrary = ... //assign your picture library

web.AllowUnsafeUpdates = true;
yourPictureLibrary.Fields[SPBuiltInFieldId.Title].Required = true;
yourPictureLibrary.Fields[SPBuiltInFieldId.Description].Required = true;
yourPictureLibrary.Fields[SPBuiltInFieldId.Keywords].Required = true;
yourPictureLibrary.Update();

edited Nov 03 '11 at 19:06

answered Nov 03 '11 at 18:59

Pedro Fonseca

198
1
16

That gets those library fields required on the list instance but not on the content-type! I misread your question! – Pedro Fonseca Nov 04 '11 at 09:46

score 0 · Answer 4 · answered Nov 03 '11 at 20:00

SPAllowContentTypes isn't settable. You might try setting ContentTypesEnabled instead.

I don't have a 2010 box to test against, but if SPAllowContentTypes returns false I think you're looking at modifying the definition of your picture library in the 14 hive (TEMPLATE\FEATURES\PictureLibrary\PicLib) to get what you're after. Tread lightly there.

Sharepoint 2010 - make Title, Description and Keyword fields as required fields in Picture Library using server-object-model

4 Answers4