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LengthConverter Class

Converts instances of other types to and from instances of a Double that represent an object's length.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public class LengthConverter : TypeConverter
<LengthConverter .../>

The LengthConverter type exposes the following members.

  NameDescription
Public methodLengthConverterInitializes a new instance of the LengthConverter class.
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  NameDescription
Public methodCanConvertFrom(Type)Returns whether this converter can convert an object of the given type to the type of this converter. (Inherited from TypeConverter.)
Public methodCanConvertFrom(ITypeDescriptorContext, Type)Determines whether conversion is possible from a specified type to a Double that represents an object's length. (Overrides TypeConverter.CanConvertFrom(ITypeDescriptorContext, Type).)
Public methodCanConvertTo(Type)Returns whether this converter can convert the object to the specified type. (Inherited from TypeConverter.)
Public methodCanConvertTo(ITypeDescriptorContext, Type)Determines whether conversion is possible to a specified type from a Double that represents an object's length. (Overrides TypeConverter.CanConvertTo(ITypeDescriptorContext, Type).)
Public methodConvertFrom(Object)Converts the given value to the type of this converter. (Inherited from TypeConverter.)
Public methodConvertFrom(ITypeDescriptorContext, CultureInfo, Object)Converts instances of other data types into instances of Double that represent an object's length. (Overrides TypeConverter.ConvertFrom(ITypeDescriptorContext, CultureInfo, Object).)
Public methodConvertFromInvariantString(String)Converts the given string to the type of this converter, using the invariant culture. (Inherited from TypeConverter.)
Public methodConvertFromInvariantString(ITypeDescriptorContext, String)Converts the given string to the type of this converter, using the invariant culture and the specified context. (Inherited from TypeConverter.)
Public methodConvertFromString(String)Converts the specified text to an object. (Inherited from TypeConverter.)
Public methodConvertFromString(ITypeDescriptorContext, String)Converts the given text to an object, using the specified context. (Inherited from TypeConverter.)
Public methodConvertFromString(ITypeDescriptorContext, CultureInfo, String)Converts the given text to an object, using the specified context and culture information. (Inherited from TypeConverter.)
Public methodConvertTo(Object, Type)Converts the given value object to the specified type, using the arguments. (Inherited from TypeConverter.)
Public methodConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type)Converts other types into instances of Double that represent an object's length. (Overrides TypeConverter.ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type).)
Public methodConvertToInvariantString(Object)Converts the specified value to a culture-invariant string representation. (Inherited from TypeConverter.)
Public methodConvertToInvariantString(ITypeDescriptorContext, Object)Converts the specified value to a culture-invariant string representation, using the specified context. (Inherited from TypeConverter.)
Public methodConvertToString(Object)Converts the specified value to a string representation. (Inherited from TypeConverter.)
Public methodConvertToString(ITypeDescriptorContext, Object)Converts the given value to a string representation, using the given context. (Inherited from TypeConverter.)
Public methodConvertToString(ITypeDescriptorContext, CultureInfo, Object)Converts the given value to a string representation, using the specified context and culture information. (Inherited from TypeConverter.)
Public methodCreateInstance(IDictionary)Re-creates an Object given a set of property values for the object. (Inherited from TypeConverter.)
Public methodCreateInstance(ITypeDescriptorContext, IDictionary)Creates an instance of the type that this TypeConverter is associated with, using the specified context, given a set of property values for the object. (Inherited from TypeConverter.)
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Protected methodGetConvertFromExceptionReturns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter.)
Protected methodGetConvertToExceptionReturns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter.)
Public methodGetCreateInstanceSupported()Returns whether changing a value on this object requires a call to the CreateInstance method to create a new value. (Inherited from TypeConverter.)
Public methodGetCreateInstanceSupported(ITypeDescriptorContext)Returns whether changing a value on this object requires a call to CreateInstance to create a new value, using the specified context. (Inherited from TypeConverter.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetProperties(Object)Returns a collection of properties for the type of array specified by the value parameter. (Inherited from TypeConverter.)
Public methodGetProperties(ITypeDescriptorContext, Object)Returns a collection of properties for the type of array specified by the value parameter, using the specified context. (Inherited from TypeConverter.)
Public methodGetProperties(ITypeDescriptorContext, Object, Attribute[])Returns a collection of properties for the type of array specified by the value parameter, using the specified context and attributes. (Inherited from TypeConverter.)
Public methodGetPropertiesSupported()Returns whether this object supports properties. (Inherited from TypeConverter.)
Public methodGetPropertiesSupported(ITypeDescriptorContext)Returns whether this object supports properties, using the specified context. (Inherited from TypeConverter.)
Public methodGetStandardValues()Returns a collection of standard values from the default context for the data type this type converter is designed for. (Inherited from TypeConverter.)
Public methodGetStandardValues(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.)
Public methodGetStandardValuesExclusive()Returns whether the collection of standard values returned from GetStandardValues is an exclusive list. (Inherited from TypeConverter.)
Public methodGetStandardValuesExclusive(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.)
Public methodGetStandardValuesSupported()Returns whether this object supports a standard set of values that can be picked from a list. (Inherited from TypeConverter.)
Public methodGetStandardValuesSupported(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.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsValid(Object)Returns whether the given value object is valid for this type. (Inherited from TypeConverter.)
Public methodIsValid(ITypeDescriptorContext, Object)Returns whether the given value object is valid for this type and for the specified context. (Inherited from TypeConverter.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Protected methodSortPropertiesSorts a collection of properties. (Inherited from TypeConverter.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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LengthConverter supports conversion to and from the following types: String, Decimal, Single, Double, Int16, Int32, Int64, UInt16, UInt32, and UInt64.

The following example shows how to create and use an instance of the LengthConverter object. A custom method called ChangeLeft is defined, which converts the content of a ListBoxItem (defined in a separate Extensible Application Markup Language (XAML) file) to an instance of Double, and later into a String. This method passes the ListBoxItem to a LengthConverter object, which converts the ListBoxItem Content to an instance of Double. Notice that this value has already been converted to a String by using the ToString method. This value is then passed back to the SetLeft method and the GetLeft method of the Canvas in order to change the position of the text1 object.

		private void ChangeLeft(object sender, SelectionChangedEventArgs args)
		{
			ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
			LengthConverter myLengthConverter = new LengthConverter();
			Double db1 = (Double)myLengthConverter.ConvertFromString(li.Content.ToString());
			Canvas.SetLeft(text1, db1);
			String st1 = (String)myLengthConverter.ConvertToString(Canvas.GetLeft(text1));
			canvasLeft.Text = "Canvas.Left = " + st1;
		}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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