JavaScriptTypeResolver JavaScriptTypeResolver JavaScriptTypeResolver JavaScriptTypeResolver Class

Definition

Provides the abstract base class for implementing a custom type resolver.

public ref class JavaScriptTypeResolver abstract
public abstract class JavaScriptTypeResolver
type JavaScriptTypeResolver = class
Public MustInherit Class JavaScriptTypeResolver
Inheritance
JavaScriptTypeResolverJavaScriptTypeResolverJavaScriptTypeResolverJavaScriptTypeResolver
Derived

Examples

The following example demonstrates how to create a custom type resolver.

public class CustomTypeResolver : JavaScriptTypeResolver
{
    public override Type ResolveType(string id)
    {
        return Type.GetType(id);
    }

    public override string ResolveTypeId(Type type)
    {
        if (type == null)
        {
            throw new ArgumentNullException("type");
        }

        return type.Name;
    }
}
Public Class CustomTypeResolver
    Inherits JavaScriptTypeResolver

    Public Overrides Function ResolveType(ByVal id As String) As Type
        Return Type.GetType(id)
    End Function

    Public Overrides Function ResolveTypeId(ByVal type As Type) As String
        If type Is Nothing Then
            Throw New ArgumentNullException("type")
        End If

        Return type.Name
    End Function
End Class

Remarks

The JavaScriptTypeResolver class provides the services for:

  • Converting managed type information to a string value through the ResolveTypeId method.

  • Resolving a string value back to the appropriate managed type through the ResolveType method.

When the JavaScriptSerializer object serializes custom types, it can optionally include in the serialized JavaScript Object Notation (JSON) string a value that contains type information. During deserialization, JavaScriptSerializer can then reference this string value to determine the appropriate managed type to which the JSON string will be converted.

If you provide a type resolver to the JavaScriptSerializer instance, the serializer will use the ResolveTypeId and ResolveType methods to map between the managed type and the string value during the serialization and deserialization process, respectively.

The JavaScriptTypeResolver class is the base class for the SimpleTypeResolver class, which provides an implementation of a type resolver that uses the managed type assembly-qualified name.

Notes to Inheritors

When you implement a type resolver, the string that is returned by the ResolveTypeId(Type) method must map back to the same managed type when the string value is passed to the ResolveType(String) method.

Constructors

JavaScriptTypeResolver() JavaScriptTypeResolver() JavaScriptTypeResolver() JavaScriptTypeResolver()

Initializes a new instance of the JavaScriptTypeResolver class.

Methods

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ResolveType(String) ResolveType(String) ResolveType(String) ResolveType(String)

When overridden in a derived class, returns the Type object that is associated with the specified type name.

ResolveTypeId(Type) ResolveTypeId(Type) ResolveTypeId(Type) ResolveTypeId(Type)

When overridden in a derived class, returns the type name for the specified Type object.

ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Applies to