ImageField.GetValue(Control, String, PropertyDescriptor) Method

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Retrieves the value of the specified field from the specified control.

protected:
 virtual System::Object ^ GetValue(System::Web::UI::Control ^ controlContainer, System::String ^ fieldName, System::ComponentModel::PropertyDescriptor ^ % cachedDescriptor);

protected virtual object GetValue (System.Web.UI.Control controlContainer, string fieldName, ref System.ComponentModel.PropertyDescriptor cachedDescriptor);

abstract member GetValue : System.Web.UI.Control * string * PropertyDescriptor -> obj
override this.GetValue : System.Web.UI.Control * string * PropertyDescriptor -> obj

Protected Overridable Function GetValue (controlContainer As Control, fieldName As String, ByRef cachedDescriptor As PropertyDescriptor) As Object

Parameters

controlContainer: Control

The Control that contains the field value.

fieldName: String

The name of the field for which to retrieve the value.

cachedDescriptor: PropertyDescriptor

A PropertyDescriptor, passed by reference, that represents the properties of the field.

Returns

Object

The value of the specified field.

Exceptions

HttpException

The controlContainer parameter is null.

-or-

The data item associated with the container control is null.

-or-

The field specified by the fieldName parameter could not be found.

Remarks

The GetValue method is a helper method used by the ImageField object to determine the value of the specified field.

Notes to Inheritors

When extending the ImageField object, you can override this method to provide custom routine to determine a field's value.

Applies to

Condividi tramite