Leggere e scrivere le connessioni esterne di file XLS e XLSB con C++

Possibili Scenari di Utilizzo

Aspose.Cells for C++ supporta la lettura e scrittura delle connessioni esterne per i file XLSX e ora estende questa capacità anche ai formati XLSB e XLS. La stessa struttura di codice funziona per tutti i tipi di file supportati.

Leggere e Scrivere Connessioni Esterne di file XLS/XLSB

Il codice di esempio seguente carica un file XLSB di esempio (funziona anche con XLS) e modifica la prima connessione esterna (tipicamente una connessione a Microsoft Access). Il codice dimostra come:

1. Caricare il file di foglio di calcolo
2. Accedere alle connessioni esterne
3. Modificare le proprietà della connessione
4. Salvare il file modificato

Codice di Esempio

Questo codice funziona sia per file XLSB che per file XLS regolando le estensioni di input/output.

#include <iostream>
#include "Aspose.Cells.h"
using namespace Aspose::Cells;

int main()
{
    Aspose::Cells::Startup();

    // Source and output directories
    U16String srcDir(u"..\\Data\\01_SourceDirectory\\");
    U16String outDir(u"..\\Data\\02_OutputDirectory\\");

    // File paths
    U16String inputFilePath = srcDir + u"sampleExternalConnection_XLSB.xlsb";
    U16String outputFilePath = outDir + u"outputExternalConnection_XLSB.xlsb";

    // Load source workbook
    Workbook workbook(inputFilePath);

    // Get first external connection
    ExternalConnectionCollection connections = workbook.GetDataConnections();
    DBConnection dbCon = connections.Get(0);

    // Print connection details
    std::cout << "Connection Name: " << dbCon.GetName().ToUtf8() << std::endl;
    std::cout << "Command: " << dbCon.GetCommand().ToUtf8() << std::endl;
    std::cout << "Connection Info: " << dbCon.GetConnectionString().ToUtf8() << std::endl;

    // Modify connection name
    dbCon.SetName(u"NewCust");

    // Save modified workbook
    workbook.Save(outputFilePath);

    std::cout << "External connection updated successfully." << std::endl;

    Aspose::Cells::Cleanup();
}

Equivalente C++:

#include <iostream>
#include <Aspose.Cells.h>

using namespace Aspose::Cells;
using namespace Aspose::Cells::ExternalConnections;

int main() {
    Aspose::Cells::Startup();
    // Load source workbook
    Workbook workbook(u"source.xlsb");
    // Access first external connection
    DBConnection conn(workbook.GetDataConnections().Get(0));

    // Output original connection details
    std::cout << "Connection Name: " << conn.GetName().ToUtf8() << std::endl;
    std::cout << "Command: " << conn.GetCommand().ToUtf8() << std::endl;
    std::cout << "Connection Info: " << conn.GetConnectionInfo().ToUtf8() << std::endl;

    // Modify connection name
    conn.SetName(u"Cust_Modified");

    // Save updated workbook
    workbook.Save(u"output.xlsb");
    Aspose::Cells::Cleanup();
    return 0;

}

Output della console

Connection Name: Cust
Command: Customer
Connection Info: Provider=Microsoft.ACE.OLEDB.12.0;Password="";User ID=Admin;Data Source=C:\TempSha\Cust.accdb;Mode=Share Deny Write;Extended Properties="";Jet OLEDB:System database="";Jet OLEDB:Registry Path="";Jet OLEDB:Database Password="";Jet OLEDB:Engine Type=6;Jet OLEDB:Database Locking Mode=0;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:New Database Password="";Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False;Jet OLEDB:Support Complex Data=False;Jet OLEDB:Bypass UserInfo Validation=False;Jet OLEDB:Limited DB Caching=False;Jet OLEDB:Bypass ChoiceField Validation=False