private Database OpenDatabase(string file)
{
List<Parameter> list = new List<Parameter>();
Parameter param1 = new Parameter();
param1.name = HamConst.HAM_PARAM_CACHESIZE;
param1.value = 768 * 1024 * 1024;
list.Add(param1);
Database db = new Database();
db.Open(file, 0, list.ToArray());
db.SetCompareFunc(new CompareFunc(NumericalCompareFunc));
return db;
}
static void Main(string[] args)
{
byte[] key = new byte[5];
byte[] record = new byte[5];
Database db = new Database();
/*
* first, create a new Database
*/
db.Create("test.db");
/*
* now we can insert, delete or lookup values in the Database
*
* for our test program, we just insert a few values, then look them
* up, then delete them and try to look them up again (which will fail).
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
record[0] = (byte)i;
db.Insert(key, record);
}
/*
* now look up all values
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
byte[] r = db.Find(key);
/*
* check if the value is ok
*/
if (r[0] != (byte)i) {
Console.Out.WriteLine("db.Find() returned bad value");
return;
}
}
/*
* close the Database handle, then re-open it (just to demonstrate how
* to open a Database file)
*/
db.Close();
db.Open("test.db");
/*
* now erase all values
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
db.Erase(key);
}
/*
* once more we try to find all values... every db.Find() call must
* now fail with HAM_KEY_NOT_FOUND
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
try {
byte[] r = db.Find(key);
}
catch (DatabaseException e) {
if (e.ErrorCode != HamConst.HAM_KEY_NOT_FOUND) {
Console.Out.WriteLine("db.Find() returned error " + e);
return;
}
}
}
/*
* We're done! No need to close the Database handle - it's closed automatically
*/
Console.Out.WriteLine("Success!");
}
public void CreateString()
{
Database db = new Database();
try {
db.Create("ntest.db");
db.Close();
db.Open("ntest.db");
db.Close();
}
catch (DatabaseException e) {
Assert.Fail("Unexpected exception " + e);
}
}