ModelMetadata Class

Artigo
02/21/2011

Provides a container for common metadata, for the ModelMetadataProvider class, and for the ModelValidator class for a data model.

Inheritance Hierarchy

System.Object
System.Web.Mvc.ModelMetadata
System.Web.Mvc.DataAnnotationsModelMetadata

Namespace: System.Web.Mvc
Assembly: System.Web.Mvc (in System.Web.Mvc.dll)

Syntax

'Declaration
Public Class ModelMetadata

public class ModelMetadata

public ref class ModelMetadata

The ModelMetadata type exposes the following members.

Constructors

	Name	Description
	ModelMetadata	Initializes a new instance of the ModelMetadata class.

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Properties

	Name	Description
	AdditionalValues	Gets a dictionary that contains additional metadata about the model.
	ContainerType	Gets or sets the type of the container for the model.
	ConvertEmptyStringToNull	Gets or sets a value that indicates whether empty strings that are posted back in forms should be converted to null reference (Nothing in Visual Basic).
	DataTypeName	Gets or sets meta information about the data type.
	Description	Gets or sets the description of the model.
	DisplayFormatString	Gets or sets the display format string for the model.
	DisplayName	Gets or sets the display name of the model.
	EditFormatString	Gets or sets the edit format string of the model.
	HideSurroundingHtml	Gets or sets a value that indicates whether the model object should be rendered using associated HTML elements.
	IsComplexType	Gets or sets a value that indicates whether the model is a complex type.
	IsNullableValueType	Gets a value that indicates whether the type is nullable.
	IsReadOnly	Gets or sets a value that indicates whether the model is read-only.
	IsRequired	Gets or sets a value that indicates whether the model is required.
	Model	Gets the value of the model.
	ModelType	Gets the type of the model.
	NullDisplayText	Gets or sets the string to display for null values.
	Properties	Gets a collection of model metadata objects that describe the properties of the model.
	PropertyName	Gets the property name.
	Provider	Gets or sets the provider.
	ShortDisplayName	Gets or sets a short display name.
	ShowForDisplay	Gets or sets a value that indicates whether the property should be displayed in read-only views such as list and detail views.
	ShowForEdit	Gets or sets a value that indicates whether the model should be displayed in editable views.
	SimpleDisplayText	Gets or sets the simple display string for the model.
	TemplateHint	Gets or sets a hint that suggests what template to use for this model.
	Watermark	Gets or sets a value that can be used as a watermark.

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Methods

	Name	Description
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	FromLambdaExpression<TParameter, TValue>	Gets the metadata from the Expression parameter for the model.
	FromStringExpression	Gets the metadata from the expression parameter for the model.
	GetDisplayName	Gets the display name for the model.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetSimpleDisplayText	Returns the simple description of the model.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValidators	Gets a list of validators for the model.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

This class is used by the DataAnnotationsModelMetadataProvider class, which is the default model metadata provider for MVC. By default, ModelMetadata objects are constructed using data taken from attributes, primarily from the System.ComponentModel and System.ComponentModel.DataAnnotations namespaces.

You can specify an alternative model metadata provider. For more information about ModelMetadata, see the entry ASP.NET MVC 2 Templates, Part 2: ModelMetadata on Brad Wilson's blog.

Thread Safety

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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