AccessDataSourceDesigner.PreFilterProperties(IDictionary) Method
Definition
Important
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Used by the designer to add properties to, or remove them from, 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 to make the ConnectionString property read-only and visible in the Properties grid.
This code example is part of a larger example provided for the AccessDataSourceDesigner class.
// Shadow control properties with design time properties.
protected override void PreFilterProperties(IDictionary properties)
{
// Call the base class method first.
base.PreFilterProperties(properties);
// Add the ConnectionString property to the property grid.
PropertyDescriptor property =
(PropertyDescriptor)properties["ConnectionString"];
Attribute[] attributes = new Attribute[]
{
new BrowsableAttribute(true),
new ReadOnlyAttribute(true)
};
properties["ConnectionString"] = TypeDescriptor.CreateProperty(
GetType(), property, attributes);
}
' Shadow control properties with design time properties.
Protected Overrides Sub PreFilterProperties(ByVal properties As IDictionary)
' Call the base class method first.
MyBase.PreFilterProperties(properties)
' Add the ConnectionString property to the property grid.
Dim prop As PropertyDescriptor
prop = CType(properties("ConnectionString"), PropertyDescriptor)
Dim atts(1) As Attribute
atts(0) = New BrowsableAttribute(True)
atts(1) = New ReadOnlyAttribute(True)
properties("ConnectionString") = TypeDescriptor.CreateProperty( _
prop.GetType(), prop, atts)
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 them from, the Properties grid.
For the AccessDataSource control, the PreFilterProperties method creates the design-time DataFile property to shadow the DataFile property of the control.
Notes to Inheritors
Override the PreFilterProperties(IDictionary) method to add properties to the design-time property collection or change their attributes. Be sure to call the base method before performing other processing.
Applies to
See also
.NET
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