Reference

OpcRequestValidatingEventArgs Members

Type

OpcRequestValidatingEventArgs

Namespace

Opc.UaFx.Server

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Inherits members from EventArgs.

Constructors

OpcRequestValidatingEventArgs

Initializes a new instance of the OpcRequestValidatingEventArgs class using the context, request, requestType and result specified.

public OpcRequestValidatingEventArgs(
    OpcContext context,
    IOpcServiceRequest request,
    OpcRequestType requestType,
    OpcResult result)

Public Sub New(
    context As OpcContext,
    request As IOpcServiceRequest,
    requestType As OpcRequestType,
    result As OpcResult)

Parameters

Name	Type	Description
context	OpcContext	The OpcContext of the request.
request	IOpcServiceRequest	The IOpcServiceRequest to validate.
requestType	OpcRequestType	The OpcRequestType of the request.
result	OpcResult	The OpcResult of the validation so far.

Exceptions

Exception	Condition
ArgumentNullException	The context, request or result is a null reference (Nothing in Visual Basic).

Remarks

The Cancel property is initialized to true if the result is bad.

Properties

Cancel

Gets or sets a value indicating whether the request is rejected.

public bool Cancel { get; set; }

Public Property Cancel As Boolean

Property value

Boolean

The value true to reject the request; otherwise the value false. The initial value is true if the Result is bad.

Remarks

The server evaluates only the Result. Setting the value true while the Result is good sets the Result to BadNotSupported. Setting the value false does not change the Result, so that a request whose Result is bad is still rejected.

Context

Gets the context of the request.

public OpcContext Context { get; }

Public ReadOnly Property Context As OpcContext

Property value

OpcContext

The OpcContext of the request, an OpcOperationContext.

Request

Gets the request to validate.

public IOpcServiceRequest Request { get; }

Public ReadOnly Property Request As IOpcServiceRequest

Property value

IOpcServiceRequest

The IOpcServiceRequest received by the server.

RequestType

Gets the type of the request.

public OpcRequestType RequestType { get; }

Public ReadOnly Property RequestType As OpcRequestType

Property value

OpcRequestType

One of the members defined by the OpcRequestType enumeration.

Result

Gets or sets the result of the validation.

public OpcResult Result { get; set; }

Public Property Result As OpcResult

Property value

OpcResult

The OpcResult with which the server accepts the request if it is good or rejects the request if it is bad. Initially it is the result of the validation by the server, i.e. of the session, the authentication of the user and the access control.

Exceptions

Exception	Condition
ArgumentNullException	The value is a null reference (Nothing in Visual Basic).

Remarks

Setting a bad result sets Cancel to true. If an event handler throws an OpcException, the server rejects the request with its result; if it throws another exception, with the code Bad.