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A valid table object is required before most table operations can take place. You need to pass a valid CTDatabase object to the CTTable constructor.
// create a CTTable object
CTTable ATable(ADatabase);
try
{
// open table "MyTable"
ATable.Open("MyTable", CTOPEN_NORMAL);
}
catch (CTException &err)
{
printf("Table open failed with error %d\n", err.GetErrorCode);
}
If you create a dynamic CTTable object with the new operator, you are required to destroy the object with the delete operator.
// create a dynamic CTTable object
CTTable* pTable = new CTTable(ADatabase);
if (!pTable)
{
printf("CTTable creation failed\n");
}
... other operations ..
// destroy the CTTable object
delete pTable;
If you destroy an active table object, all record objects associated with the table will be reset and the table closed before the object is destroyed.
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It is possible to create or open a table without database support by passing a session object when creating the table object. Start your session with the CTSESSION_CTREE mode.
// create the session and table objects
CTSession ASession(CTSESSION_CTREE);
CTTable ATable(ASession);
// logon to session
ASession.Logon("FAIRCOMS", "ADMIN", "ADMIN");
// without database support, it is necessary to
// specify the path were the table is located
ATable.SetPath("C:\\MyDocuments");
// open the table
try
{
ATable.Open("MyTable", CTOPEN_NORMAL);
}
catch (CTException &err)
{
printf("Table open failed with error %d\n, err.GetErrorCode());
}
Please note from the code above the need to specify the path where the table is located. If no path is specified, c-treeDB will try to open the table from the current directory. The same principle applies when creating a table without database support:
// create the session and table objects
CTSession ASession(CTSESSION_CTREE);
CTTable ATable(ASession);
// logon to session
ASession.Logon("FAIRCOMS", "ADMIN", "ADMIN");
// add fields to table
ATable.AddField("Field1", CT_INT2, 2);
ATable.AddField("Field2", CT_FSTRING, 30);
// without database support, it is necessary to
// specify the path were the table is located
ATable.SetPath("C:\\MyDocuments");
// open the table
try
{
ATable.Create("MyTable", CTCREATE_NORMAL);
}
catch (CTException &err)
{
printf("Create open failed with error %d\n, err.GetErrorCode());
}
