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WebInvokeAttribute Class

Indicates a service operation is logically an invoke operation and that it can be called by the Web programming model.

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

[AttributeUsageAttribute(AttributeTargets.Method)]
public sealed class WebInvokeAttribute : Attribute, 
	IOperationBehavior, IWmiInstanceProvider

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.

NoteNote:

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

[ServiceContract]
public interface ICalculator2
{
    [OperationContract]
    [WebInvoke]
    long Add(long x, long y);

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

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

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

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

System.Object
  System.Attribute
    System.ServiceModel.Web.WebInvokeAttribute

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

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5

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