ChangeOperationResponse 클래스

정의

public ref class ChangeOperationResponse sealed : System::Data::Services::Client::OperationResponse

public sealed class ChangeOperationResponse : System.Data.Services.Client.OperationResponse

type ChangeOperationResponse = class
    inherit OperationResponse

Public NotInheritable Class ChangeOperationResponse
Inherits OperationResponse

상속

Object

OperationResponse

ChangeOperationResponse

예제

다음 코드에서는 SaveChanges 호출 결과를 처리하는 방법을 보여 줍니다.

DataServiceContext service = new DataServiceContext(new Uri("http://myserviceroot"));  

// Do insert, update, delete, or attach operations.  

DataServiceResponse dsr;  

try  
{  
    dsr = service.SaveChanges(SaveChangesOptions.Batch);    
   // Or service.SaveChanges(SaveChangesOptions.ContinueOnError);   
   //Or service.SaveChanges();  
   // If there are no errors during save changes, process the results:  

    if (dsr.IsBatchResponse)  
    {  
           /*inspect HTTP artifacts associated with the entire batch:  
                             dsr.BatchHeaders, dsr.BatchStatusCode*/ }  

    foreach (ChangeOperationResponse cor in dsr)  
    {  

            if (cor.Descriptor is EntityDescriptor)  
            {  
                EntityDescriptor ed = (EntityDescriptor)cor.Descriptor;  
                // This should be the case if  
                // SaveChanges did not throw an exception.    

                // After an entity is processed by SaveChanges,  
                // it is always moved to the unchanged state.  
                System.Diagnostics.Debug.Assert(  
                           ed.State == EntityStates.Unchanged);    
                // This shows that the state should be unchanged if  
                // the result is success.  

                //process the entity in the response payload: ed.Entity  
            }  
            else if (cor.Descriptor is LinkDescriptor)  
            {  
                LinkDescriptor ld = (LinkDescriptor)cor.Descriptor;  
               // This should be the case if SaveChanges did not throw an exception.  

               // After an entity is processed by SaveChanges it  
               // is always moved to the unchanged state.  
                System.Diagnostics.Debug.Assert(  
                            ld.State == EntityStates.Unchanged);    
                // The state should be unchanged if the result is success.  

                //process the link in the response payload: ld.Source,  
                // ld.SourceProperty, or ld.Target.  
            }  
     }  

}  
catch (DataServiceSaveException se)  
{  
    // Error while saving changes  
    dsr = se.Response;  

    if (dsr.IsBatchResponse)   
    {   
        /*inspect HTTP artifacts associated with the entire batch:  
             dsr.BatchHeaders, dsr.BatchStatusCode*/   
}      
}  

    foreach (ChangeOperationResponse cor in dsr)  
    {  
        if (cor.Error != null)  
        {  
            //process error  
        }  
        else  
        {  
            // same success case processing as in the loop over DSRs results in   
            // the try block. You could put that processing in a method   
            // and call it from here.      
        }  
    }  

}  

 catch(Exception)  
 {  
    // Error while saving changes, but not thrown by the client library.  

    // Process ArgumentException, InvalidOperationException, or similar.  
}  
}  

설명

ChangeOperationResponse 개체는 이 라이브러리의 사용자가 직접 생성할 수 없습니다. 대신, DataServiceResponse 클래스의 열거자를 통해 반환된 작업 응답을 열거할 때 참조가 반환됩니다.

SaveChanges는 DataServiceContext가 마지막으로 호출된 후 SaveChanges에서 수집된 보류 중인 변경 내용을 데이터 서비스에 전송합니다. 변경 내용은 AddObject, AddLink, DeleteObject, DeleteLink, Detach, DetachLink 및 유사 메서드를 호출하면 컨텍스트에 추가됩니다.

SaveChanges는 데이터 서비스에 전송된 모든 작업에 대한 응답을 나타내는 DataServiceResponse를 반환합니다. DataServiceResponse 개체는 유지되거나 시도된 변경 내용을 나타내는 ChangeOperationResponse 또는 EntityDescriptor 인스턴스의 시퀀스가 차례로 포함되는 LinkDescriptor 개체의 시퀀스를 포함합니다.

속성

메서드

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