FontConverter Class
Definition
Important
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Converts Font objects from one data type to another.
public ref class FontConverter : System::ComponentModel::TypeConverterpublic class FontConverter : System.ComponentModel.TypeConvertertype FontConverter = class
inherit TypeConverterPublic Class FontConverter
Inherits TypeConverter- Inheritance
Examples
The following code example demonstrates how to use the FontConverter to convert a Font to and from a string. This example is designed to be used with Windows Forms. Paste this code into a form and call the ShowFontStringConversion method when handling the form's Paint event, passing e as PaintEventArgs.
void ShowFontStringConversion( PaintEventArgs^ e )
{
// Create the FontConverter.
System::ComponentModel::TypeConverter^ converter =
System::ComponentModel::TypeDescriptor::GetConverter( System::Drawing::Font::typeid );
System::Drawing::Font^ font1 = dynamic_cast<System::Drawing::Font^>(converter->ConvertFromString( "Arial, 12pt" ));
String^ fontName1 = converter->ConvertToInvariantString( font1 );
String^ fontName2 = converter->ConvertToString( font1 );
e->Graphics->DrawString( fontName1, font1, Brushes::Red, 10, 10 );
e->Graphics->DrawString( fontName2, font1, Brushes::Blue, 10, 30 );
}
private void ShowFontStringConversion(PaintEventArgs e)
{
// Create the FontConverter.
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
Font font1 = (Font) converter.ConvertFromString("Arial, 12pt");
string fontName1 = converter.ConvertToInvariantString(font1);
string fontName2 = converter.ConvertToString(font1);
e.Graphics.DrawString(fontName1, font1, Brushes.Red, 10, 10);
e.Graphics.DrawString(fontName2, font1, Brushes.Blue, 10, 30);
}
Private Sub ShowFontStringConversion(ByVal e As PaintEventArgs)
' Create the FontConverter.
Dim converter As System.ComponentModel.TypeConverter = _
System.ComponentModel.TypeDescriptor.GetConverter(GetType(Font))
Dim font1 As Font = _
CType(converter.ConvertFromString("Arial, 12pt"), Font)
Dim fontName1 As String = _
converter.ConvertToInvariantString(font1)
Dim fontName2 As String = converter.ConvertToString(font1)
e.Graphics.DrawString(fontName1, font1, Brushes.Red, 10, 10)
e.Graphics.DrawString(fontName2, font1, Brushes.Blue, 10, 30)
End Sub
Remarks
A type converter is used to convert values between data types. A type converter also supports property configuration at design time by providing text-to-value conversion or a list of values that users can select from. Access the FontConverter class through the TypeDescriptor class by calling the GetConverter method.
Note
In .NET 6 and later versions, the System.Drawing.Common package, which includes this type, is only supported on Windows operating systems. Use of this type in cross-platform apps causes compile-time warnings and run-time exceptions. For more information, see System.Drawing.Common only supported on Windows.
Constructors
| FontConverter() |
Initializes a new FontConverter object. |
Methods
| CanConvertFrom(ITypeDescriptorContext, Type) |
Determines whether this converter can convert an object in the specified source type to the native type of the converter. |
| CanConvertFrom(Type) |
Returns whether this converter can convert an object of the given type to the type of this converter. (Inherited from TypeConverter) |
| CanConvertTo(ITypeDescriptorContext, Type) |
Gets a value indicating whether this converter can convert an object to the given destination type using the context. |
| CanConvertTo(Type) |
Returns whether this converter can convert the object to the specified type. (Inherited from TypeConverter) |
| ConvertFrom(ITypeDescriptorContext, CultureInfo, Object) |
Converts the specified object to the native type of the converter. |
| ConvertFrom(Object) |
Converts the given value to the type of this converter. (Inherited from TypeConverter) |
| ConvertFromInvariantString(ITypeDescriptorContext, String) |
Converts the given string to the type of this converter, using the invariant culture and the specified context. (Inherited from TypeConverter) |
| ConvertFromInvariantString(String) |
Converts the given string to the type of this converter, using the invariant culture. (Inherited from TypeConverter) |
| ConvertFromString(ITypeDescriptorContext, CultureInfo, String) |
Converts the given text to an object, using the specified context and culture information. (Inherited from TypeConverter) |
| ConvertFromString(ITypeDescriptorContext, String) |
Converts the given text to an object, using the specified context. (Inherited from TypeConverter) |
| ConvertFromString(String) |
Converts the specified text to an object. (Inherited from TypeConverter) |
| ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type) |
Converts the specified object to another type. |
| ConvertTo(Object, Type) |
Converts the given value object to the specified type, using the arguments. (Inherited from TypeConverter) |
| ConvertToInvariantString(ITypeDescriptorContext, Object) |
Converts the specified value to a culture-invariant string representation, using the specified context. (Inherited from TypeConverter) |
| ConvertToInvariantString(Object) |
Converts the specified value to a culture-invariant string representation. (Inherited from TypeConverter) |
| ConvertToString(ITypeDescriptorContext, CultureInfo, Object) |
Converts the given value to a string representation, using the specified context and culture information. (Inherited from TypeConverter) |
| ConvertToString(ITypeDescriptorContext, Object) |
Converts the given value to a string representation, using the given context. (Inherited from TypeConverter) |
| ConvertToString(Object) |
Converts the specified value to a string representation. (Inherited from TypeConverter) |
| CreateInstance(IDictionary) |
Re-creates an Object given a set of property values for the object. (Inherited from TypeConverter) |
| CreateInstance(ITypeDescriptorContext, IDictionary) |
Creates an object of this type by using a specified set of property values for the object. |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| Finalize() |
Allows the FontConverter to attempt to free resources and perform other cleanup operations before the FontConverter is reclaimed by garbage collection. |
| GetConvertFromException(Object) |
Returns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter) |
| GetConvertToException(Object, Type) |
Returns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter) |
| GetCreateInstanceSupported() |
Returns whether changing a value on this object requires a call to the CreateInstance(IDictionary) method to create a new value. (Inherited from TypeConverter) |
| GetCreateInstanceSupported(ITypeDescriptorContext) |
Determines whether changing a value on this object should require a call to the CreateInstance method to create a new value. |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetProperties(ITypeDescriptorContext, Object, Attribute[]) |
Retrieves the set of properties for this type. By default, a type does not have any properties to return. |
| GetProperties(ITypeDescriptorContext, Object) |
Returns a collection of properties for the type of array specified by the value parameter, using the specified context. (Inherited from TypeConverter) |
| GetProperties(Object) |
Returns a collection of properties for the type of array specified by the value parameter. (Inherited from TypeConverter) |
| GetPropertiesSupported() |
Returns whether this object supports properties. (Inherited from TypeConverter) |
| GetPropertiesSupported(ITypeDescriptorContext) |
Determines whether this object supports properties. The default is |
| GetStandardValues() |
Returns a collection of standard values from the default context for the data type this type converter is designed for. (Inherited from TypeConverter) |
| GetStandardValues(ITypeDescriptorContext) |
Returns a collection of standard values for the data type this type converter is designed for when provided with a format context. (Inherited from TypeConverter) |
| GetStandardValuesExclusive() |
Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list. (Inherited from TypeConverter) |
| GetStandardValuesExclusive(ITypeDescriptorContext) |
Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list of possible values, using the specified context. (Inherited from TypeConverter) |
| GetStandardValuesSupported() |
Returns whether this object supports a standard set of values that can be picked from a list. (Inherited from TypeConverter) |
| GetStandardValuesSupported(ITypeDescriptorContext) |
Returns whether this object supports a standard set of values that can be picked from a list, using the specified context. (Inherited from TypeConverter) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| IsValid(ITypeDescriptorContext, Object) |
Returns whether the given value object is valid for this type and for the specified context. (Inherited from TypeConverter) |
| IsValid(Object) |
Returns whether the given value object is valid for this type. (Inherited from TypeConverter) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| SortProperties(PropertyDescriptorCollection, String[]) |
Sorts a collection of properties. (Inherited from TypeConverter) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
