ExpressionsCollectionEditor::EditValue Method (ITypeDescriptorContext, IServiceProvider, Object)
Edits the value of the specified object with the specified service provider and context.
Assembly: System.Design (in System.Design.dll)
public: virtual Object^ EditValue( ITypeDescriptorContext^ context, IServiceProvider^ provider, Object^ value ) override
Parameters
- context
- Type: System.ComponentModel::ITypeDescriptorContext
An ITypeDescriptorContext object that can be used to gain additional context information such as the associated control.
- provider
- Type: System::IServiceProvider
A service provider object through which editing services can be obtained.
- value
- Type: System::Object
An instance of the object being edited.
Return Value
Type: System::ObjectAn ExpressionBindingCollection object containing the selected expressions; otherwise, if no expressions are selected, the value object.
The EditValue method launches the user interface for editing the value object. The designer host calls the EditValue method when you attempt to edit the value of a property that this editor is associated with. The input service provider is used to obtain any editing services that are required within the EditValue.
A designer host, such as Visual Studio 2005, uses the ExpressionBuilder and ExpressionEditor class implementations with the ExpressionsCollectionEditor and ExpressionsCollectionConverter classes to set the expression bindings for control properties at design time, and the ControlPersister class to persist the expressions for run time. Expression strings reference a localizable resource, an application setting, a connection string, or a custom expression type. The expression string is bound to the control property at design time, and then used at run time to determine the value for the property.
If users cancel the user interface without modifying the expression binding collection, the EditValue method returns the input value parameter.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.