ColumnAttribute.Required Property
Gets or sets a value that indicates whether the field (column) is required to have a value.
Namespace: Microsoft.SharePoint.Linq
Assembly: Microsoft.SharePoint.Linq (in Microsoft.SharePoint.Linq.dll)
Syntax
'Declaration
Public Property Required As Boolean
Get
Set
'Usage
Dim instance As ColumnAttribute
Dim value As Boolean
value = instance.Required
instance.Required = value
public bool Required { get; set; }
Property Value
Type: System.Boolean
true, if the field must have a value; false otherwise.
Examples
The following example shows Required in use:
[ContentType(Name="Item", Id="0x01", List="Team Members")]
[DataContract()]
public partial class TeamMembersItem : Item {
private System.Nullable<double> _memberID;
public TeamMembersItem() {
this.Initialize();
}
[Column(Name="MemberID", Storage="_memberID", Required=true, FieldType="Number")]
[DataMember()]
public System.Nullable<double> MemberID {
get {
return this._memberID;
}
set {
if ((this._memberID != value)) {
this.OnPropertyChanging("MemberID", this._memberID);
this._memberID = value;
this.OnPropertyChanged("MemberID");
}
}
}
// Other members omitted for readability.
}