HttpMethodAttribute Class
Collapse the table of content
Expand the table of content

HttpMethodAttribute Class


Applying this attribute to an XML Web service client using HTTP-GET or HTTP-POST, sets the types that serialize the parameters sent to an XML Web service method and read the response from the XML Web service method. This class cannot be inherited.

Namespace:   System.Web.Services.Protocols
Assembly:  System.Web.Services (in System.Web.Services.dll)


public sealed class HttpMethodAttribute : Attribute


Initializes a new instance of the HttpMethodAttribute class.

System_CAPS_pubmethodHttpMethodAttribute(Type, Type)

Initializes a new instance of the HttpMethodAttribute.


Gets or sets a Type that serializes parameters sent from an XML Web service client to the XML Web service method.


Gets or sets a Type that deserializes the response from an XML Web service method.


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


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.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)


Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

If an XML Web service client calls an XML Web service method using HTTP-GET, ReturnFormatter must be set to XmlReturnReader and ParameterFormatter set to UrlParameterWriter. XML Web service clients invoking a XML Web service using HTTP-POST must set ReturnFormatter to XmlReturnReader and ParameterFormatter to HtmlFormParameterWriter.

The following example is a proxy class generated by the Wsdl.exe utility for calling an XML Web service utility using HTTP-POST. The Wsdl.exe automatically supplies the correct types for ReturnFormatter and ParameterFormatter, along with specifying that the proxy class inherits from HttpPostClientProtocol.

public class MyUser : System.Web.Services.Protocols.HttpPostClientProtocol {

    public MyUser() {
        this.Url = "";

    [System.Web.Services.Protocols.HttpMethodAttribute(typeof(System.Web.Services.Protocols.XmlReturnReader), typeof(System.Web.Services.Protocols.HtmlFormParameterWriter))]
    public UserName GetUserName() {
        return ((UserName)(this.Invoke("GetUserName", (this.Url + "/GetUserName"), new object[0])));

    public System.IAsyncResult BeginGetUserName(System.AsyncCallback callback, object asyncState) {
        return this.BeginInvoke("GetUserName", (this.Url + "/GetUserName"), new object[0], callback, asyncState);

    public UserName EndGetUserName(System.IAsyncResult asyncResult) {
        return ((UserName)(this.EndInvoke(asyncResult)));

[System.Xml.Serialization.XmlRootAttribute(Namespace="", IsNullable=true)]
public class UserName {

    public string Name;

    public string Domain;

.NET Framework
Available since 1.1

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

Return to top
© 2015 Microsoft