SignInRequestMessage Class

.NET Framework (current version)

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Represents a WS-Federation Sign-In Request message.

Namespace:   System.IdentityModel.Services
Assembly:  System.IdentityModel.Services (in System.IdentityModel.Services.dll)

Public Class SignInRequestMessage
	Inherits WSFederationMessage

System_CAPS_pubmethodSignInRequestMessage(Uri, String)

Initializes a new instance of the SignInRequestMessage class with the specified base URL and wtrealm parameter.

System_CAPS_pubmethodSignInRequestMessage(Uri, String, String)

Initializes a new instance of the SignInRequestMessage class using the specified base URI, wtrealm parameter, and wreply parameter. Supports non-standard message creation for backward compatibility.


Gets or sets the wa parameter of the message.(Inherited from WSFederationMessage.)


Gets or sets the wauth parameter of the message.


Gets or sets the base URL to which the message applies.(Inherited from FederationMessage.)


Gets or sets the wctx parameter of the message.(Inherited from WSFederationMessage.)


Gets or sets the wct parameter of the message.


Gets or sets the wencoding parameter of the message.(Inherited from WSFederationMessage.)


Gets or sets the wfed parameter of the message.


Gets or sets the wfresh parameter of the message.


Gets or sets the whr parameter of the message.


Gets the message parameters as a dictionary.(Inherited from FederationMessage.)


Gets or sets the wp parameter of the message.


Gets or sets the wtrealm parameter of the message.


Gets or sets the wreply parameter of the message.


Gets or sets the wreq parameter of the message.


Gets or sets the wreqptr parameter of the message.


Gets a string representation of the URL that corresponds to this message.


Gets or sets the wres parameter of the message.


Determines whether the specified object is equal to the current object.(Inherited from Object.)


Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)


Serves as the default hash function. (Inherited from Object.)


Returns the specified parameter value from the parameters dictionary.(Inherited from FederationMessage.)


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


Creates a shallow copy of the current Object.(Inherited from Object.)


Removes a parameter from the parameters dictionary.(Inherited from FederationMessage.)

System_CAPS_pubmethodSetParameter(String, String)

Sets the value of a parameter in the parameters dictionary.(Inherited from FederationMessage.)

System_CAPS_pubmethodSetUriParameter(String, String)

Sets the value of a parameter in the parameters dictionary. The value must be an absolute URI.(Inherited from FederationMessage.)


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


Validates the current instance.(Overrides FederationMessage.Validate().)


Writes this message in query string form to the specified text writer.(Overrides FederationMessage.Write(TextWriter).)


Serializes the message as a form post and returns the resulting Form together with its Javascript as a string.(Inherited from FederationMessage.)


Returns a string representation of the message in query-string format.(Inherited from FederationMessage.)

A WS-Federation sign-in message is sent by a relying party (RP) to a security token service (STS) to request a security token. The wa parameter must be set to “wsignout1.0” and the wtrealm parameter should be set to the security realm of the requested resource (this is often the URL of the requested resource). Other optional parameters may also be specified in the request.

A SignOutRequestMessage message is created by the static methods of the SignOutRequestMessage class, for example the CreateFromUri method, when the wa parameter is set to “wsignin1.0”, there is no wresult or wresultptr parameter present, and either a wtrealm parameter or a wreply parameter is present.


For backward compatibility with Active Directory Federation Services (AD FS) version 1.0, Windows Identity Foundation (WIF) allows either the wtrealm parameter or the wreply parameter to be set (or both) for a sign-in message to be valid; however, the WS-Federation protocol requires that the wtrealm parameter be present in a sign-in request. In most scenarios, you should ensure that the wtrealm parameter is specified.

The SignInRequestMessage class exposes several properties that can be used to set or access individual message parameters. These parameters can also be set or accessed through the Parameters dictionary. For example, you can read the wtrealm parameter in the message either through the Realm property or by specifying “wtrealm” as the key to the Parameters dictionary.

For more information about the message that this class represents, see section 13 of the following specification: Web Services Federation Language (WS-Federation) Version 1.2 (

string identityProviderUri = Request.QueryString["whr"];
string action = Request.QueryString["wa"];

SignInRequestMessage signInRequest = FederatedAuthentication.WSFederationAuthenticationModule.CreateSignInRequest(Guid.NewGuid().ToString(), 
signInRequest.Realm = "htp://";
signInRequest.HomeRealm = identityProviderUri;


.NET Framework
Available since 4.5

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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