ObjectDataSourceDesigner.PreFilterProperties(IDictionary) Method

Reference

Definition

Namespace:: System.Web.UI.Design.WebControls

Assembly:: System.Design.dll

Important

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Used by the designer to remove properties from or add additional properties to the display in the Properties grid or to shadow properties of the associated control.

protected:
 override void PreFilterProperties(System::Collections::IDictionary ^ properties);

protected override void PreFilterProperties (System.Collections.IDictionary properties);

override this.PreFilterProperties : System.Collections.IDictionary -> unit

Protected Overrides Sub PreFilterProperties (properties As IDictionary)

Parameters

properties: IDictionary

A collection implementing the IDictionary of the added and shadowed properties.

Examples

The following code example shows how to override the PreFilterProperties method in a class that is inherited from the ObjectDataSourceDesigner class to change the Properties grid of a control that is derived from the ObjectDataSource class at design time. The example makes the NamingContainer property visible in the Properties grid.

// Shadow the control properties with design-time properties.
protected override void PreFilterProperties(IDictionary properties)
{
    // Call the base method first.
    base.PreFilterProperties(properties);

    // Make the NamingContainer visible in the Properties grid.
    PropertyDescriptor selectProp =
        (PropertyDescriptor)properties["NamingContainer"];
    properties["NamingContainer"] =
        TypeDescriptor.CreateProperty(selectProp.ComponentType,
            selectProp, BrowsableAttribute.Yes);
} // PreFilterProperties

' Shadow the control properties with design-time properties.
Protected Overrides Sub PreFilterProperties( _
    ByVal properties As IDictionary)

    ' Call the base method first.
    MyBase.PreFilterProperties(properties)

    ' Make the NamingContainer visible in the Properties grid.
    Dim selectProp As PropertyDescriptor = _
        CType(properties("NamingContainer"), PropertyDescriptor)
    properties("NamingContainer") = _
        TypeDescriptor.CreateProperty(selectProp.ComponentType, _
            selectProp, BrowsableAttribute.Yes)
End Sub

Remarks

Control designers use methods that are derived from the ComponentDesigner.PreFilterProperties method to shadow various control properties with corresponding design-time properties that the designer implements, and to add properties to or remove properties from the Properties grid.

The PreFilterProperties method creates design-time properties to shadow the TypeName and SelectMethod properties of the associated ObjectDataSource control so that they appear in the Properties grid of the visual designer.

Notes to Inheritors

Override the PreFilterProperties(IDictionary) method to add properties to or change attributes of properties in the design-time property collection. Be sure to call the PreFilterProperties(IDictionary) base method before performing other processing.

Applies to