用C++读写XLS和XLSB文件的外部连接

可能的使用场景

Aspose.Cells for C++支持读取和写入XLSX文件的外部连接，并将此功能扩展到XLSB和XLS格式。相同的代码结构适用于所有支持的文件类型。

读取和写入XLS/XLSB文件的外部连接

以下示例代码加载一个示例XLSB文件（同样适用于XLS），并修改其第一个外部连接（通常是Microsoft Access数据库连接）。代码演示了：

1. 加载电子表格文件
2. 访问外部连接
3. 修改连接属性
4. 保存修改后的文件

示例代码

此代码适用于XLSB和XLS文件，通过调整输入/输出文件扩展名。

#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();
}

C++等效：

#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;

}

控制台输出

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