WebInvokeAttribute Class

WebInvokeAttribute Class


Represents an attribute indicating that a service operation is logically an invoke operation and that it can be called by the WCF REST programming model.

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


public sealed class WebInvokeAttribute : Attribute, IOperationBehavior


Initializes a new instance of the WebGetAttribute class.


Gets and sets the body style of the messages that are sent to and from the service operation.


Gets the IsBodyStyleSetExplicitly property.


Gets the IsRequestFormatSetExplicitly property.


Gets and sets the protocol (for example HTTP) method the service operation responds to.


Gets and sets the RequestFormat property.


Gets and sets the ResponseFormat property.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


The Uniform Resource Identifier (URI) template for the service operation.


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

The WebInvokeAttribute attribute is applied to a service operation in addition to the OperationContractAttribute and associates the operation with a UriTemplate as well as an underlying transport verb that represents an invocation (for example, HTTP POST, PUT, or DELETE). The WebInvokeAttribute attribute is a passive operation behavior (the IOperationBehavior methods do nothing) that adds metadata to the operation description. Applying the WebInvokeAttribute attribute to a service operation has no effect unless a behavior that looks for this metadata in the operation description (such as WebHttpBehavior) is added to the service's behavior collection. The WebInvokeAttribute determines what HTTP method that a service operation responds to. By default, all methods that have the WebInvokeAttribute applied respond to POST requests. The Method property allows you to specify a different HTTP method. If you want a service operation to respond to GET, use the WebGetAttribute instead.

The following example shows how to use the WebInvokeAttribute attribute.


Because the Method property is not specified in the following code, all service operations are mapped to the HTTP POST method.

public interface ICalculator2
    long Add(long x, long y);

    [WebInvoke(UriTemplate = "Sub?x={x}&y={y}")]
    long Subtract(long x, long y);

    [WebInvoke(UriTemplate = "Mult?x={x}&y={y}", BodyStyle = WebMessageBodyStyle.Bare)]
    long Multiply(long x, long y);

    [WebInvoke(UriTemplate = "Div?x={x}&y={y}", BodyStyle = WebMessageBodyStyle.Bare, RequestFormat = WebMessageFormat.Xml, ResponseFormat=WebMessageFormat.Xml)]
    long Divide(long x, long y);

    [WebInvoke(Method = "POST", UriTemplate = "Mod?x={x}&y={y}")]
    long Mod(long x, long y);

.NET Framework
Available since 3.5
Available since 4.0

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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