InternetTimeout Property Example (VC++)

This example demonstrates the InternetTimeout property, which exists on the DataControl and DataSpace objects. In this case, the InternetTimeout property is demonstrated on the DataControl object and the timeout is set to 20 seconds.

// BeginInternetTimeoutCpp

#import "c:\Program Files\Common Files\System\ADO\msado15.dll" \

no_namespace rename("EOF", "EndOfFile")

#import "C:\Program Files\Common Files\System\MSADC\msadco.dll"

#include <ole2.h>

#include <stdio.h>

#include <conio.h>

// Function declarations

inline void TESTHR(HRESULT x) {if FAILED(x) _com_issue_error(x);};

void InternetTimeOutX(void);

void PrintProviderError(_ConnectionPtr pConnection);

void PrintComError(_com_error &e);

//////////////////////////////////////////////////////////

// //

// Main Function //

// //

//////////////////////////////////////////////////////////

void main()

{

if(FAILED(::CoInitialize(NULL)))

return;

InternetTimeOutX();

::CoUninitialize();

}

//////////////////////////////////////////////////////////

// //

// InternetTimeOutX Function //

// //

//////////////////////////////////////////////////////////

void InternetTimeOutX(void)

{

HRESULT hr = S_OK;

// Define ADO object pointers.

// Initialize pointers on define.

// These are in the ADODB:: namespace.

_RecordsetPtr pRst = NULL;

//Define RDS object pointers

RDS::IBindMgrPtr dc ;

try

{

TESTHR(dc.CreateInstance(__uuidof(RDS::DataControl)));

dc->Server = "http://MyServer";

dc->Connect = "Data Source='AuthorDatabase'";

dc->SQL = "SELECT * FROM Authors";

// Wait at least 20 seconds.

dc->InternetTimeout = 20000;

dc->Refresh();

// Use another Recordset as a convenience

pRst = dc->GetRecordset();

while(!(pRst->EndOfFile))

{

printf("%s %s",(LPSTR) (_bstr_t) pRst->Fields->

GetItem("au_fname")->Value,

(LPSTR) (_bstr_t) pRst->Fields->

GetItem("au_lname")->Value);

pRst->MoveNext();

}

pRst->Close();

}

catch (_com_error &e)

{

PrintProviderError(pRst->GetActiveConnection());

PrintComError(e);

}

}

//////////////////////////////////////////////////////////

// //

// PrintProviderError Function //

// //

//////////////////////////////////////////////////////////

void PrintProviderError(_ConnectionPtr pConnection)

{

// Print Provider Errors from Connection object.

// pErr is a record object in the Connection's Error collection.

ErrorPtr pErr = NULL;

if( (pConnection->Errors->Count) > 0)

{

long nCount = pConnection->Errors->Count;

// Collection ranges from 0 to nCount -1.

for(long i = 0; i < nCount; i++)

{

pErr = pConnection->Errors->GetItem(i);

printf("\t Error number: %x\t%s", pErr->Number,

pErr->Description);

}

}

}

//////////////////////////////////////////////////////////

// //

// PrintComError Function //

// //

//////////////////////////////////////////////////////////

void PrintComError(_com_error &e)

{

_bstr_t bstrSource(e.Source());

_bstr_t bstrDescription(e.Description());

// Print Com errors.

printf("Error\n");

printf("\tCode = %08lx\n", e.Error());

printf("\tCode meaning = %s\n", e.ErrorMessage());

printf("\tSource = %s\n", (LPCSTR) bstrSource);

printf("\tDescription = %s\n", (LPCSTR) bstrDescription);

}

// EndInternetTimeoutCpp

See Also

InternetTimeoutProperty (RDS)