IDailyTrigger没有修改日期

Question

我有一个任务“自动更新”，该任务已经存在于任务计划程序中，因为我需要在GUI中控制日期  用于触发任务。

我可以从任务计划程序中读取任务，但是无法在以下代码中修改日期。 请帮助我解决以下代码中的问题。  预先感谢。

HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
if( FAILED(hr) )   {

    printf("\nCoInitializeEx failed: %x", hr );
    return 1;
}

//  Set general COM security levels.
hr = CoInitializeSecurity(
            NULL,
            -1,
            NULL,
            NULL,
            RPC_C_AUTHN_LEVEL_PKT_PRIVACY,
            RPC_C_IMP_LEVEL_IMPERSONATE,
            NULL,
            0,
            NULL);

if( FAILED(hr) ) {
    printf("\nCoInitializeSecurity failed: %x", hr );
    CoUninitialize();
    return 1;
}

//  ------------------------------------------------------
//  Create an instance of the Task Service.
ITaskService *pService = NULL;
hr = CoCreateInstance( CLSID_TaskScheduler,
                       NULL,
                       CLSCTX_INPROC_SERVER,
                       IID_ITaskService,
                       (void**)&pService );
if (FAILED(hr))  {
    printf("Failed to CoCreate an instance of the TaskService class: %x", hr);
    CoUninitialize();
    return 1;
}

//  Connect to the task service.
hr = pService->Connect(_variant_t(), _variant_t(),
                       _variant_t(), _variant_t());

if( FAILED(hr) ) {
    printf("ITaskService::Connect failed: %x", hr );
    pService->Release();
    CoUninitialize();
    return 1;
}

//  ------------------------------------------------------
//  Get the pointer to the root task folder.
ITaskFolder *pRootFolder = NULL;
hr = pService->GetFolder( _bstr_t( L"\\") , &pRootFolder );

pService->Release();
if( FAILED(hr) )
{
    printf("Cannot get Root Folder pointer: %x", hr );
    CoUninitialize();
    return 1;
}

//  -------------------------------------------------------
//  Get the registered tasks in the folder.
IRegisteredTaskCollection* pTaskCollection = NULL;
hr = pRootFolder->GetTasks( NULL, &pTaskCollection );


pRootFolder->Release();
if( FAILED(hr) )
{
    printf("Cannot get the registered tasks.: %x", hr);
    CoUninitialize();
    return 1;
}

LONG numTasks = 0;
hr = pTaskCollection->get_Count(&numTasks);


if( numTasks == 0 )
{
    printf("\nNo Tasks are currently running" );
    pTaskCollection->Release();
    CoUninitialize();
    return 1;
}

printf("\nNumber of Tasks : %d", numTasks );

TASK_STATE taskState;

for(LONG i=0; i < numTasks; i++) {
    IRegisteredTask* pRegisteredTask = NULL;
    hr = pTaskCollection->get_Item( _variant_t(i+1), &pRegisteredTask );

    if( SUCCEEDED(hr) ) {
        BSTR taskName = NULL;
        std::string string = "AutoUpdate";
        hr = pRegisteredTask->get_Name(&taskName);
        if( SUCCEEDED(hr) )
        {
            printf("\nTask Name: %S", taskName);

            // covert to std::string
            _bstr_t bstr_t(taskName);
            std::string str(bstr_t);

            if(string.compare(str) == 0){
                std::cout <<"\n"<<" inside AutoUpdate " <<"\n";

                ITaskDefinition *pDefintion = NULL;
                hr = pRegisteredTask->get_Definition(&pDefintion);

                if( FAILED(hr) )  {
                    printf("Cannot get the get_Definition: %x", hr);
                    CoUninitialize();
                    return 1;
                }

                ITriggerCollection *pTriggerCollection = NULL;
                hr =  pDefintion->get_Triggers(&pTriggerCollection);

                if (FAILED(hr)) {
                    printf("Cannot get the get_Triggers: %x", hr);
                    pDefintion->Release();
                    CoUninitialize();
                    return 1;
                }

                ITrigger *pTrigger = NULL;
                hr = pTriggerCollection->Create(TASK_TRIGGER_DAILY, &pTrigger);
                pTriggerCollection->Release();
                if (FAILED(hr)) {
                    printf("Cannot create the Triggers: %x", hr);
                    pDefintion->Release();
                    CoUninitialize();
                    return 1;
                }

                IDailyTrigger *pDailyTrigger = NULL;
                hr = pTrigger->QueryInterface(
                            IID_IDailyTrigger, (void**)&pDailyTrigger);
                pTrigger->Release();

                if (FAILED(hr)) {
                    printf("QueryInterface call on IDailyTrigger failed: %x", hr);
                    pDefintion->Release();
                    CoUninitialize();
                    return 1;
                }


                hr = pDailyTrigger->put_DaysInterval((short)10);
                if (FAILED(hr)) {
                    printf("QueryInterface call on IDailyTrigger failed: %x", hr);
                    pDailyTrigger->Release();
                    pDefintion->Release();
                    CoUninitialize();
                    return 1;
                }

            }
        }
    }
}
pTaskCollection->Release();
CoUninitialize();
return 0;

请找到TaskSchedular的快照

在这里，我需要修改“每隔一遍”天。我可以在用户界面中随意更改任何一天。