UserInputFilter class
Provides a base class for all user input filters that the Business Data Connectivity (BDC) service supports.
Inheritance hierarchy
System.MarshalByRefObject
Microsoft.SharePoint.BusinessData.Runtime.FilterBase
Microsoft.SharePoint.BusinessData.Runtime.UserInputFilter
Microsoft.SharePoint.BusinessData.Runtime.ComparisonFilter
Microsoft.SharePoint.BusinessData.Runtime.LimitFilter
Microsoft.SharePoint.BusinessData.Runtime.PageNumberFilter
Microsoft.SharePoint.BusinessData.Runtime.SortingFilter
Namespace: Microsoft.SharePoint.BusinessData.Runtime
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Syntax
'Declaration
<SerializableAttribute> _
<SharePointPermissionAttribute(SecurityAction.InheritanceDemand, ObjectModel := True)> _
<SharePointPermissionAttribute(SecurityAction.Demand, ObjectModel := True)> _
Public MustInherit Class UserInputFilter _
Inherits FilterBase _
Implements IUserInputFilter, IFilter
'Usage
Dim instance As UserInputFilter
[SerializableAttribute]
[SharePointPermissionAttribute(SecurityAction.InheritanceDemand, ObjectModel = true)]
[SharePointPermissionAttribute(SecurityAction.Demand, ObjectModel = true)]
public abstract class UserInputFilter : FilterBase,
IUserInputFilter, IFilter
Remarks
BDC supports two types of filters:
User input filters User input filters require users to provide filter values just as the Comparison, Limit, and Wildcardfilters.
System filters System filters are system-provided.
Following are the user input filters that BDC supports:
Limit filter Limits the number of instances returned to n. SQL supports this filter with the SELECT TOP clause. By using a Limit filter, you can prevent long waits, timeouts, and users from issuing bad queries that request large amounts of data.
Comparison filter Takes an operator and a condition and returns only the instances that meet the condition.
Wildcard filter Limits the instances returned to fields such as value, where value may contain the asterisk (*) wildcard character. Users can use this filter type to present more user-friendly filters such as "starts with" and "contains."
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.