SharePoint: Make a list field Required programmatically

sharepointsharepoint-2007sharepoint-2010

I have a list and one of the list field is of managed meta data field type.It has to be a required field on the list.I would not set the Required attribute to true in the XML file, as other lists in the project use it as a optional field.Searched many articles, none of them helped .

Note: Field.Required=true;
Field.Update();
Doesn't make the field as required field
Field is not part of content type

Any ideas on this are appreciated..

Thanks

Best Answer

Is the field a part of a contenttype? In that case you might want to get a reference to the fieldlink and set that as required:

var myField = list.Fields["MyFieldName"];
var ct = list.Contenttypes["MyContentType"];

var fieldLink = ct.FieldLinks[myField];
fieldLink.Required = true;
ct.Update();

Related Solutions

Hide field in SharePoint alert email

Would editing the fields in the alert template fix your issue?

http://blogs.msdn.com/sharepointdeveloperdocs/archive/2007/12/07/customizing-alert-notifications-and-alert-templates-in-windows-sharepoint-services-3-0.aspx

"To exclude some fields from being rendered in the email, you should include them in the <DigestNotificationExcludedFields> and <ImmediateNotificationExcludedFields> section."

How to update a content type programmatically

Try like this:

private void SetFieldRequired(SPList list, string field, string contentType, bool required)
{
    SPField fieldInList = list.Fields[field];
    fieldInList.Required = required;        
    fieldInList.Update();

    SPField fieldInContentType = list.ContentTypes[contentType].Fields[field];
    fieldInContentType.Required = required;
    fieldInContentType.Update();
}

Don't forget to add some exception handling.

Best Answer

Related Solutions

Hide field in SharePoint alert email

How to update a content type programmatically

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