WebException.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / WebException.cs / 1 / WebException.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

 
namespace System.Net { 
    using System;
    using System.Runtime.Serialization; 
    using System.Security.Permissions;

    /*++
 
    Abstract:
 
        Contains the defintion for the WebException object. This is a subclass of 
        Exception that contains a WebExceptionStatus and possible a reference to a
        WebResponse. 


    --*/
 

 
    ///  
    ///    
    ///       Provides network communication exceptions to the application. 
    ///
    ///       This is the exception that is thrown by WebRequests when something untoward
    ///       happens. It's a subclass of WebException that contains a WebExceptionStatus and possibly
    ///       a reference to a WebResponse. The WebResponse is only present if we actually 
    ///       have a response from the remote server.
    ///     
    ///  
    [Serializable]
    public class WebException : InvalidOperationException, ISerializable { 

        private WebExceptionStatus m_Status = WebExceptionStatus.UnknownError; //Should be changed to GeneralFailure;
        private WebResponse m_Response;
        [NonSerialized] 
        private WebExceptionInternalStatus m_InternalStatus = WebExceptionInternalStatus.RequestFatal;
 
 
        /// 
        ///     
        ///       Creates a new instance of the 
        ///       class with the default status
        ///     from the
        ///     values. 
        ///    
        ///  
        public WebException() { 

        } 


        /// 
        ///     
        ///       Creates a new instance of the  class with the specified error
        ///       message. 
        ///     
        /// 
        public WebException(string message) : this(message, null) { 
        }


        ///  
        ///    
        ///       Creates a new instance of the  class with the specified error 
        ///       message and nested exception. 
        ///
        ///           Message         - Message string for exception. 
        ///           InnerException  - Exception that caused this exception.
        ///
        ///    
        ///  
        public WebException(string message, Exception innerException) :
            base(message, innerException) { 
        } 

        public WebException(string message, WebExceptionStatus status) : 
            this(message, null, status, null) {
        }

 
        /// 
        ///     
        ///       Creates a new instance of the  class with the specified error 
        ///       message and status.
        /// 
        ///           Message         - Message string for exception.
        ///           Status          - Network status of exception
        ///    
        ///  
        internal WebException(string message, WebExceptionStatus status, WebExceptionInternalStatus internalStatus, Exception innerException) :
            this(message, innerException, status, null, internalStatus) { 
        } 

        ///  
        ///    
        ///       Creates a new instance of the  class with the specified error
        ///       message, nested exception, status and response.
        /// 
        ///           Message         - Message string for exception.
        ///           InnerException  - The exception that caused this one. 
        ///           Status          - Network status of exception 
        ///           Response        - The WebResponse we have.
        ///     
        /// 
        public WebException(string message,
                            Exception innerException,
                            WebExceptionStatus status, 
                            WebResponse response) :
            this(message, null, innerException, status, response) 
        { } 

        internal WebException(string message, string data, Exception innerException, WebExceptionStatus status, WebResponse response) : 
            base(message + (data != null ? ": '" + data + "'" : ""), innerException)
        {
            m_Status = status;
            m_Response = response; 
        }
 
        internal WebException(string message, 
                            Exception innerException,
                            WebExceptionStatus status, 
                            WebResponse response,
                            WebExceptionInternalStatus internalStatus) :
            this(message, null, innerException, status, response, internalStatus)
        { } 

        internal WebException(string message, string data, Exception innerException, WebExceptionStatus status, WebResponse response, WebExceptionInternalStatus internalStatus) : 
            base(message + (data != null ? ": '" + data + "'" : ""), innerException) 
        {
            m_Status = status; 
            m_Response = response;
            m_InternalStatus = internalStatus;
        }
 

        protected WebException(SerializationInfo serializationInfo, StreamingContext streamingContext) 
            : base(serializationInfo, streamingContext) { 
           // m_Status = (WebExceptionStatus)serializationInfo.GetInt32("Status");
           // m_InternalStatus = (WebExceptionInternalStatus)serializationInfo.GetInt32("InternalStatus"); 
        }

        /// 
 
        [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]
        void ISerializable.GetObjectData(SerializationInfo serializationInfo, StreamingContext streamingContext) 
        { 
            GetObjectData(serializationInfo, streamingContext);
        } 


        [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] 		
        public override void GetObjectData(SerializationInfo serializationInfo, StreamingContext streamingContext){ 
            base.GetObjectData(serializationInfo, streamingContext);
            //serializationInfo.AddValue("Status", (int)m_Status, typeof(int)); 
            //serializationInfo.AddValue("InternalStatus", (int)m_InternalStatus, typeof(int)); 
        }
 
        /// 
        ///    
        ///       Gets the status of the response.
        ///     
        /// 
        public WebExceptionStatus Status { 
            get { 
                return m_Status;
            } 
        }


        ///  
        ///    
        ///       Gets the error message returned from the remote host. 
        ///     
        /// 
        public WebResponse Response { 
            get {
                return m_Response;
            }
        } 

        ///  
        ///     
        ///       Gets the error message returned from the remote host.
        ///     
        /// 
        internal WebExceptionInternalStatus InternalStatus {
            get {
                return m_InternalStatus; 
            }
        } 
 
    }; // class WebException
 
    internal enum WebExceptionInternalStatus {
        RequestFatal      = 0,
        ServicePointFatal = 1,
        Recoverable       = 2, 
        Isolated          = 3,
    } 
 

} // namespace System.Net
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WebException.cs source code in C# .NET

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