public void Enumerator()
{
var writeOptions = LevelDBInterop.leveldb_writeoptions_create();
this.InnerPut(writeOptions, "key1", "value1");
this.InnerPut(writeOptions, "key2", "value2");
this.InnerPut(writeOptions, "key3", "value3");
var entries = new List <KeyValuePair <string, string> >();
var readOptions = LevelDBInterop.leveldb_readoptions_create();
IntPtr iter = LevelDBInterop.leveldb_create_iterator(Database, readOptions);
for (LevelDBInterop.leveldb_iter_seek_to_first(iter);
LevelDBInterop.leveldb_iter_valid(iter) == 1;
LevelDBInterop.leveldb_iter_next(iter))
{
IntPtr len;
string key = GetValue(LevelDBInterop.leveldb_iter_key(iter, out len), len);
string value = GetValue(LevelDBInterop.leveldb_iter_value(iter, out len), len);
var entry = new KeyValuePair <string, string>(key, value);
entries.Add(entry);
}
LevelDBInterop.leveldb_iter_destroy(iter);
LevelDBInterop.leveldb_readoptions_destroy(readOptions);
Assert.Equal(3, entries.Count);
Assert.Equal("key1", entries[0].Key);
Assert.Equal("value1", entries[0].Value);
Assert.Equal("key2", entries[1].Key);
Assert.Equal("value2", entries[1].Value);
Assert.Equal("key3", entries[2].Key);
Assert.Equal("value3", entries[2].Value);
LevelDBInterop.leveldb_writeoptions_destroy(writeOptions);
}
public void IsValid()
{
var writeOptions = LevelDBInterop.leveldb_writeoptions_create();
this.InnerPut(writeOptions, "key1", "value1");
var readOptions = LevelDBInterop.leveldb_readoptions_create();
IntPtr iter = LevelDBInterop.leveldb_create_iterator(Database, readOptions);
LevelDBInterop.leveldb_iter_seek_to_last(iter);
Assert.True(LevelDBInterop.leveldb_iter_valid(iter) == 1);
LevelDBInterop.leveldb_iter_next(iter);
Assert.False(LevelDBInterop.leveldb_iter_valid(iter) == 1);
}
/// <summary>
/// 移动迭代器到下一位置。
/// </summary>
public void Next()
{
LevelDBInterop.leveldb_iter_next(this._handle);
CheckLastError();
}
