WebException Конструкторы
Определение
Важно!
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Инициализирует новый экземпляр класса WebException.
Перегрузки
WebException() |
Инициализирует новый экземпляр класса WebException. |
WebException(String) |
Инициализирует новый экземпляр класса WebException указанным сообщением об ошибке. |
WebException(SerializationInfo, StreamingContext) |
Устаревшие..
Инициализирует новый экземпляр класса WebException из указанных экземпляров SerializationInfo и StreamingContext. |
WebException(String, WebExceptionStatus) |
Инициализирует новый экземпляр класса WebException с указанным сообщением об ошибке и статусом. |
WebException(String, Exception) |
Инициализирует новый экземпляр класса WebException с указанным сообщением об ошибке и вложенным исключением. |
WebException(String, Exception, WebExceptionStatus, WebResponse) |
Инициализирует новый экземпляр класса WebException с указанным сообщением об ошибке, вложенным исключением, статусом и ответом. |
WebException()
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
Инициализирует новый экземпляр класса WebException.
public:
WebException();
public WebException ();
Public Sub New ()
Примеры
В следующем примере по умолчанию WebExceptionвозникает исключение .
try
{
// A 'Socket' object has been created.
Socket^ httpSocket = gcnew Socket( AddressFamily::InterNetwork,SocketType::Stream,ProtocolType::Tcp );
// The IPaddress of the unknown uri is resolved using the 'Dns::Resolve' method.
IPHostEntry^ hostEntry = Dns::Resolve( "http://www.contoso.com" );
IPAddress^ serverAddress = hostEntry->AddressList[ 0 ];
IPEndPoint^ endPoint = gcnew IPEndPoint( serverAddress, 80 );
httpSocket->Connect( endPoint );
Console::WriteLine( "Connection created successfully" );
httpSocket->Close();
}
catch ( SocketException^ e )
{
String^ exp = e->Message;
// Throw the WebException with no parameters.
throw gcnew WebException;
}
try
{
// A 'Socket' object has been created.
Socket httpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
IPHostEntry hostEntry = Dns.Resolve("http://www.contoso.com");
IPAddress serverAddress = hostEntry.AddressList[0];
IPEndPoint endPoint = new IPEndPoint(serverAddress, 80);
httpSocket.Connect(endPoint);
Console.WriteLine("Connection created successfully");
httpSocket.Close();
}
catch(SocketException e)
{
String exp = e.Message;
// Throw the WebException with no parameters.
throw new WebException();
}
Try
' A 'Socket' object has been created.
Dim httpSocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
' The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
' which leads to the 'SocketException' exception.
Dim hostEntry As IPHostEntry = Dns.Resolve("http://www.contoso.com")
Dim serverAddress As IPAddress = hostEntry.AddressList(0)
Dim endPoint As New IPEndPoint(serverAddress, 80)
httpSocket.Connect(endPoint)
Console.WriteLine("Connection created successfully")
httpSocket.Close()
Catch e As SocketException
Dim exp As [String] = e.Message
' Throw the WebException with no parameters.
Throw New WebException()
End Try
Комментарии
Конструктор без параметров инициализирует новый экземпляр WebException класса . Свойство Message инициализируется системным сообщением, описывающим ошибку. Это сообщение учитывает культуру текущей системы. Свойства InnerException и инициализируются Response в null
. Свойство Status инициализировано значением параметра RequestCanceled.
Применяется к
WebException(String)
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
Инициализирует новый экземпляр класса WebException указанным сообщением об ошибке.
public:
WebException(System::String ^ message);
public WebException (string message);
public WebException (string? message);
new System.Net.WebException : string -> System.Net.WebException
Public Sub New (message As String)
Параметры
- message
- String
Текст сообщения об ошибке.
Примеры
В следующем примере возникает исключение , WebException указывая сообщение об ошибке.
try
{
// A 'Socket' object has been created.
Socket^ httpSocket = gcnew Socket( AddressFamily::InterNetwork, SocketType::Stream, ProtocolType::Tcp );
// The IPaddress of the unknown uri is resolved using the 'Dns::Resolve' method.
IPHostEntry^ hostEntry = Dns::Resolve( connectUri );
IPAddress^ serverAddress = hostEntry->AddressList[ 0 ];
IPEndPoint^ endPoint = gcnew IPEndPoint( serverAddress, 80 );
httpSocket->Connect( endPoint );
Console::WriteLine( "Connection created successfully" );
httpSocket->Close();
}
catch ( SocketException^ e )
{
Console::WriteLine( "\nException thrown.\nThe Original Message is: {0}", e->Message );
// Throw the 'WebException' object with a message string specific to the situation.
throw gcnew WebException( "Unable to locate the Server with 'www.contoso.com' Uri." );
}
try
{
// A 'Socket' object has been created.
Socket httpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
IPHostEntry hostEntry = Dns.Resolve(connectUri);
IPAddress serverAddress = hostEntry.AddressList[0];
IPEndPoint endPoint = new IPEndPoint(serverAddress, 80);
httpSocket.Connect(endPoint);
Console.WriteLine("Connection created successfully");
httpSocket.Close();
}
catch(SocketException e)
{
Console.WriteLine("\nException thrown.\nThe Original Message is: "+e.Message);
// Throw the 'WebException' object with a message string specific to the situation.
throw new WebException("Unable to locate the Server with 'www.contoso.com' Uri.");
}
Try
' A 'Socket' object has been created.
Dim httpSocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
' The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
Dim hostEntry As IPHostEntry = Dns.Resolve(connectUri)
Dim serverAddress As IPAddress = hostEntry.AddressList(0)
Dim endPoint As New IPEndPoint(serverAddress, 80)
httpSocket.Connect(endPoint)
Console.WriteLine("Connection created successfully")
httpSocket.Close()
Catch e As SocketException
Console.WriteLine((ControlChars.Cr + "Exception thrown." + ControlChars.Cr + "The Original Message is: " + e.Message))
' Throw the 'WebException' object with a message string specific to the situation.
Throw New WebException("Unable to locate the Server with 'www.contoso.com' Uri.")
End Try
Комментарии
Экземпляр WebException инициализируется со значением Messagemessage
свойства . Если message
имеет значение null
, свойство инициализируется Message в предоставленное системой сообщение. Свойства InnerException и инициализируются Response в null
. Свойство Status инициализировано значением параметра RequestCanceled.
См. также раздел
Применяется к
WebException(SerializationInfo, StreamingContext)
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
Внимание!
This API supports obsolete formatter-based serialization. It should not be called or extended by application code.
Инициализирует новый экземпляр класса WebException из указанных экземпляров SerializationInfo и StreamingContext.
protected:
WebException(System::Runtime::Serialization::SerializationInfo ^ serializationInfo, System::Runtime::Serialization::StreamingContext streamingContext);
protected WebException (System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext streamingContext);
[System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
protected WebException (System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext streamingContext);
new System.Net.WebException : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Net.WebException
[<System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
new System.Net.WebException : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Net.WebException
Protected Sub New (serializationInfo As SerializationInfo, streamingContext As StreamingContext)
Параметры
- serializationInfo
- SerializationInfo
Объект SerializationInfo, который содержит сведения, необходимые для сериализации нового экземпляра класса WebException.
- streamingContext
- StreamingContext
Объект StreamingContext, который содержит источник сериализованного потока, связанного с новым объектом WebException.
- Атрибуты
Комментарии
Этот конструктор реализует ISerializable интерфейс для WebException класса .
См. также раздел
Применяется к
WebException(String, WebExceptionStatus)
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
Инициализирует новый экземпляр класса WebException с указанным сообщением об ошибке и статусом.
public:
WebException(System::String ^ message, System::Net::WebExceptionStatus status);
public WebException (string message, System.Net.WebExceptionStatus status);
public WebException (string? message, System.Net.WebExceptionStatus status);
new System.Net.WebException : string * System.Net.WebExceptionStatus -> System.Net.WebException
Public Sub New (message As String, status As WebExceptionStatus)
Параметры
- message
- String
Текст сообщения об ошибке.
- status
- WebExceptionStatus
Одно из значений перечисления WebExceptionStatus.
Примеры
В следующем примере создается WebException , указывая сообщение об ошибке WebExceptionStatusи .
try
{
// A 'Socket' object has been created.
Socket^ httpSocket = gcnew Socket( AddressFamily::InterNetwork, SocketType::Stream, ProtocolType::Tcp );
// The IPaddress of the unknown uri is resolved using the 'Dns::Resolve' method.
IPHostEntry^ hostEntry = Dns::Resolve( "http://www.contoso.com" );
IPAddress^ serverAddress = hostEntry->AddressList[ 0 ];
IPEndPoint^ endPoint = gcnew IPEndPoint( serverAddress, 80 );
httpSocket->Connect( endPoint );
Console::WriteLine( "Connection created successfully" );
httpSocket->Close();
}
catch ( SocketException^ e )
{
Console::WriteLine( "\nException thrown.\nThe Original Message is: {0}", e->Message );
// Throw the 'WebException' object with a message string and message status specific to the situation.
throw gcnew WebException( "Unable to locate the Server with 'www.contoso.com' Uri.", WebExceptionStatus::NameResolutionFailure );
}
try
{
// A 'Socket' object has been created.
Socket httpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
IPHostEntry hostEntry = Dns.Resolve("http://www.contoso.com");
IPAddress serverAddress = hostEntry.AddressList[0];
IPEndPoint endPoint = new IPEndPoint(serverAddress, 80);
httpSocket.Connect(endPoint);
Console.WriteLine("Connection created successfully");
httpSocket.Close();
}
catch(SocketException e)
{
Console.WriteLine("\nException thrown.\nThe Original Message is: "+e.Message);
// Throw the 'WebException' object with a message string and message status specific to the situation.
throw new WebException("Unable to locate the Server with 'www.contoso.com' Uri.",WebExceptionStatus.NameResolutionFailure);
}
Try
' A 'Socket' object has been created.
Dim httpSocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
' The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
Dim hostEntry As IPHostEntry = Dns.Resolve(connectUri)
Dim serverAddress As IPAddress = hostEntry.AddressList(0)
Dim endPoint As New IPEndPoint(serverAddress, 80)
httpSocket.Connect(endPoint)
Console.WriteLine("Connection created successfully")
httpSocket.Close()
Catch e As SocketException
Console.WriteLine((ControlChars.Cr + "Exception thrown." + ControlChars.Cr + "The Original Message is: " + e.Message))
' Throw the 'WebException' object with a message string and message status specific to the situation.
Throw New WebException("Unable to locate the Server with 'www.contoso.com' Uri.", WebExceptionStatus.NameResolutionFailure)
End Try
Комментарии
Экземпляр WebException инициализируется со Message значением свойства , message
а Status свойство — значением status
. Если message
имеет значение null
, свойство инициализируется Message в предоставленное системой сообщение. Свойства InnerException и инициализируются Response в null
.
Применяется к
WebException(String, Exception)
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
Инициализирует новый экземпляр класса WebException с указанным сообщением об ошибке и вложенным исключением.
public:
WebException(System::String ^ message, Exception ^ inner);
public:
WebException(System::String ^ message, Exception ^ innerException);
public WebException (string message, Exception inner);
public WebException (string? message, Exception? innerException);
public WebException (string message, Exception innerException);
new System.Net.WebException : string * Exception -> System.Net.WebException
new System.Net.WebException : string * Exception -> System.Net.WebException
Public Sub New (message As String, inner As Exception)
Public Sub New (message As String, innerException As Exception)
Параметры
- message
- String
Текст сообщения об ошибке.
- innerinnerException
- Exception
Вложенное исключение.
Примеры
В следующем примере создается исключение путем WebException указания сообщения об ошибке и вложенного исключения.
try
{
// A 'Socket' object has been created.
Socket^ httpSocket = gcnew Socket( AddressFamily::InterNetwork, SocketType::Stream, ProtocolType::Tcp );
// The IPaddress of the unknown uri is resolved using the 'Dns::Resolve' method.
IPHostEntry^ hostEntry = Dns::Resolve( connectUri );
IPAddress^ serverAddress = hostEntry->AddressList[ 0 ];
IPEndPoint^ endPoint = gcnew IPEndPoint( serverAddress, 80 );
httpSocket->Connect( endPoint );
Console::WriteLine( "Connection created successfully" );
httpSocket->Close();
}
catch ( SocketException^ e )
{
Console::WriteLine( "\nException thrown.\nThe Original Message is: {0}", e->Message );
// Throw the 'WebException' object with a message string specific to the situation;
// and the 'InnerException' that actually led to this exception.
throw gcnew WebException( "Unable to locate the Server with 'www.contoso.com' Uri.", e );
}
try
{
// A 'Socket' object has been created.
Socket httpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
IPHostEntry hostEntry = Dns.Resolve(connectUri);
IPAddress serverAddress = hostEntry.AddressList[0];
IPEndPoint endPoint = new IPEndPoint(serverAddress, 80);
httpSocket.Connect(endPoint);
Console.WriteLine("Connection created successfully");
httpSocket.Close();
}
catch(SocketException e)
{
Console.WriteLine("\nException thrown.\nThe Original Message is: "+e.Message);
// Throw the 'WebException' object with a message string specific to the situation;
// and the 'InnerException' which actually lead to this exception.
throw new WebException("Unable to locate the Server with 'www.contoso.com' Uri.",e);
}
Try
' A 'Socket' object has been created.
Dim httpSocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
' The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.
Dim hostEntry As IPHostEntry = Dns.Resolve(connectUri)
Dim serverAddress As IPAddress = hostEntry.AddressList(0)
Dim endPoint As New IPEndPoint(serverAddress, 80)
httpSocket.Connect(endPoint)
Console.WriteLine("Connection created successfully")
httpSocket.Close()
Catch e As SocketException
Console.WriteLine((ControlChars.Cr + "Exception thrown." + ControlChars.Cr + "The Original Message is: " + e.Message))
' Throw the 'WebException' object with a message string specific to the situation.
' and the 'InnerException' which actually lead to this exception.
Throw New WebException("Unable to locate the Server with 'www.contoso.com' Uri.", e)
End Try
Комментарии
Экземпляр WebException инициализируется со Message значением свойства , message
а InnerException свойство — значением innerException
. Если message
имеет значение null
, свойство инициализируется Message в предоставленное системой сообщение. Свойства InnerException и инициализируются Response в null
. Свойство Status инициализировано значением параметра RequestCanceled.
См. также раздел
Применяется к
WebException(String, Exception, WebExceptionStatus, WebResponse)
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
- Исходный код:
- WebException.cs
Инициализирует новый экземпляр класса WebException с указанным сообщением об ошибке, вложенным исключением, статусом и ответом.
public:
WebException(System::String ^ message, Exception ^ inner, System::Net::WebExceptionStatus status, System::Net::WebResponse ^ response);
public:
WebException(System::String ^ message, Exception ^ innerException, System::Net::WebExceptionStatus status, System::Net::WebResponse ^ response);
public WebException (string message, Exception inner, System.Net.WebExceptionStatus status, System.Net.WebResponse response);
public WebException (string? message, Exception? innerException, System.Net.WebExceptionStatus status, System.Net.WebResponse? response);
public WebException (string message, Exception innerException, System.Net.WebExceptionStatus status, System.Net.WebResponse response);
new System.Net.WebException : string * Exception * System.Net.WebExceptionStatus * System.Net.WebResponse -> System.Net.WebException
new System.Net.WebException : string * Exception * System.Net.WebExceptionStatus * System.Net.WebResponse -> System.Net.WebException
Public Sub New (message As String, inner As Exception, status As WebExceptionStatus, response As WebResponse)
Public Sub New (message As String, innerException As Exception, status As WebExceptionStatus, response As WebResponse)
Параметры
- message
- String
Текст сообщения об ошибке.
- innerinnerException
- Exception
Вложенное исключение.
- status
- WebExceptionStatus
Одно из значений перечисления WebExceptionStatus.
- response
- WebResponse
Экземпляр WebResponse, содержащий ответ от удаленного узла в сети.
Примеры
В следующем примере создается WebException , указывая сообщение об ошибке WebExceptionStatusи .
// Send the data.
Encoding^ ASCII = Encoding::ASCII;
String^ requestPage = String::Concat( "GET /nhjj.htm HTTP/1.1\r\nHost: ", connectUri, "\r\nConnection: Close\r\n\r\n" );
array<Byte>^ byteGet = ASCII->GetBytes( requestPage );
array<Byte>^ recvBytes = gcnew array<Byte>(256);
// Create an 'IPEndPoint' object.
IPHostEntry^ hostEntry = Dns::Resolve( connectUri );
IPAddress^ serverAddress = hostEntry->AddressList[ 0 ];
IPEndPoint^ endPoint = gcnew IPEndPoint( serverAddress,80 );
// Create a 'Socket' object for sending data.
Socket^ connectSocket = gcnew Socket( AddressFamily::InterNetwork, SocketType::Stream, ProtocolType::Tcp );
// Connect to host using 'IPEndPoint' object.
connectSocket->Connect( endPoint );
// Sent the 'requestPage' text to the host.
connectSocket->Send( byteGet, byteGet->Length, (SocketFlags)(0) );
// Receive the information sent by the server.
Int32 bytesReceived = connectSocket->Receive( recvBytes, recvBytes->Length, (SocketFlags)(0) );
String^ headerString = ASCII->GetString( recvBytes, 0, bytesReceived );
// Check whether 'status 404' is there or not in the information sent by server.
if ( headerString->IndexOf( "404" ) != -1 )
{
bytesReceived = connectSocket->Receive( recvBytes, recvBytes->Length, (SocketFlags)(0) );
MemoryStream^ memoryStream = gcnew MemoryStream( recvBytes );
getStream = (System::IO::Stream^)(memoryStream);
// Create a 'WebResponse' object
WebResponse^ myWebResponse = (WebResponse^)(gcnew HttpConnect( getStream ));
Exception^ myException = gcnew Exception( "File Not found" );
// Throw the 'WebException' object with a message string, message status, InnerException and WebResponse
throw gcnew WebException( "The Requested page is not found.",myException,WebExceptionStatus::ProtocolError,myWebResponse );
}
connectSocket->Close();
// Send the data.
Encoding ASCII = Encoding.ASCII;
string requestPage = "GET /nhjj.htm HTTP/1.1\r\nHost: " + connectUri + "\r\nConnection: Close\r\n\r\n";
Byte[] byteGet = ASCII.GetBytes(requestPage);
Byte[] recvBytes = new Byte[256];
// Create an 'IPEndPoint' object.
IPHostEntry hostEntry = Dns.Resolve(connectUri);
IPAddress serverAddress = hostEntry.AddressList[0];
IPEndPoint endPoint = new IPEndPoint(serverAddress, 80);
// Create a 'Socket' object for sending data.
Socket connectSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream,ProtocolType.Tcp);
// Connect to host using 'IPEndPoint' object.
connectSocket.Connect(endPoint);
// Sent the 'requestPage' text to the host.
connectSocket.Send(byteGet, byteGet.Length, 0);
// Receive the information sent by the server.
Int32 bytesReceived = connectSocket.Receive(recvBytes, recvBytes.Length, 0);
String headerString = ASCII.GetString(recvBytes, 0, bytesReceived);
// Check whether 'status 404' is there or not in the information sent by server.
if(headerString.IndexOf("404")!=-1)
{
bytesReceived = connectSocket.Receive(recvBytes, recvBytes.Length, 0);
MemoryStream memoryStream = new MemoryStream(recvBytes);
getStream = (Stream) memoryStream;
// Create a 'WebResponse' object
WebResponse myWebResponse = (WebResponse) new HttpConnect(getStream);
Exception myException = new Exception("File Not found");
// Throw the 'WebException' object with a message string, message status,InnerException and WebResponse
throw new WebException("The Requested page is not found.",myException,WebExceptionStatus.ProtocolError,myWebResponse);
}
connectSocket.Close();
' Send the data.
Dim ASCII As Encoding = Encoding.ASCII
Dim requestPage As String = "GET /nhjj.htm HTTP/1.1" + ControlChars.Lf + ControlChars.Cr + "Host: " + connectUri + ControlChars.Lf + ControlChars.Cr + "Connection: Close" + ControlChars.Lf + ControlChars.Cr + ControlChars.Lf + ControlChars.Cr
Dim byteGet As [Byte]() = ASCII.GetBytes(requestPage)
Dim recvBytes(256) As [Byte]
' Create an 'IPEndPoint' object.
Dim hostEntry As IPHostEntry = Dns.Resolve(connectUri)
Dim serverAddress As IPAddress = hostEntry.AddressList(0)
Dim endPoint As New IPEndPoint(serverAddress, 80)
' Create a 'Socket' object for sending data.
Dim connectSocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
' Connect to host using 'IPEndPoint' object.
connectSocket.Connect(endPoint)
' Sent the 'requestPage' text to the host.
connectSocket.Send(byteGet, byteGet.Length, 0)
' Receive the information sent by the server.
Dim bytesReceived As Int32 = connectSocket.Receive(recvBytes, recvBytes.Length, 0)
Dim headerString As [String] = ASCII.GetString(recvBytes, 0, bytesReceived)
' Check whether 'status 404' is there or not in the information sent by server.
If headerString.IndexOf("404") <> False Then
bytesReceived = connectSocket.Receive(recvBytes, recvBytes.Length, 0)
Dim memoryStream As New MemoryStream(recvBytes)
getStream = CType(memoryStream, Stream)
' Create a 'WebResponse' object.
Dim myWebResponse As WebResponse = CType(New HttpConnect(getStream), WebResponse)
Dim myException As New Exception("File Not found")
' Throw the 'WebException' object with a message string, message status,InnerException and WebResponse.
Throw New WebException("The Requested page is not found.", myException, WebExceptionStatus.ProtocolError, myWebResponse)
End If
connectSocket.Close()
Комментарии
Экземпляр WebException инициализируется со Message значением message
свойства , свойству InnerException присваивается значение , свойству Status — значение innerException
, свойству — значение status
, а свойству Response — значение response
. Если message
имеет значение null
, свойство инициализируется Message в предоставленное системой сообщение.