OpacityConverter.ConvertFrom Method
Definition
Important
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Converts the specified object to the converter's native type.
public:
override System::Object ^ ConvertFrom(System::ComponentModel::ITypeDescriptorContext ^ context, System::Globalization::CultureInfo ^ culture, System::Object ^ value);public override object ConvertFrom (System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value);public override object? ConvertFrom (System.ComponentModel.ITypeDescriptorContext? context, System.Globalization.CultureInfo? culture, object value);override this.ConvertFrom : System.ComponentModel.ITypeDescriptorContext * System.Globalization.CultureInfo * obj -> objPublic Overrides Function ConvertFrom (context As ITypeDescriptorContext, culture As CultureInfo, value As Object) As ObjectParameters
- context
- ITypeDescriptorContext
A ITypeDescriptorContext that provides information about the context of a type converter.
- culture
- CultureInfo
The locale information for the conversion.
- value
- Object
The object to convert.
Returns
An Object that represents the converted value.
Exceptions
The object was not a supported type for the conversion.
value could not be properly converted to type Double.
-or-
The resulting converted value was less than zero percent or greater than one hundred percent.
Remarks
The ConvertFrom method is specialized to convert String values that represent percentages or decimal fractions to their corresponding Double values, which represent the opacity as a percentage. Types other than String are passed to the base class implementation of this method.
Notes to Inheritors
Override this method to provide your own conversion requirements.
You can use the context parameter to extract additional information about the environment this converter is being invoked from. The parameter may be null, so you should always verify the contents. Also, properties on the ITypeDescriptorContext may also return null.
