AccessProviderSample.AccessDBProvider.ItemExists C# (CSharp) Метод

        protected override bool ItemExists(string path)
        {
            // check if the path represented is a drive
            if (PathIsDrive(path))
            {
                return true;
            }

            // Obtain type, table name and row number from path
            string tableName;
            int rowNumber;

            PathType type = GetNamesFromPath(path, out tableName, out rowNumber);

            DatabaseTableInfo table = GetTable(tableName);

            if (type == PathType.Table)
            {
                // if specified path represents a table then DatabaseTableInfo
                // object for the same should exist
                if (table != null)
                {
                    return true;
                }
            }
            else if (type == PathType.Row)
            {
                // if specified path represents a row then DatabaseTableInfo should
                // exist for the table and then specified row number must be within
                // the maximum row count in the table
                if (table != null && rowNumber < table.RowCount)
                {
                    return true;
                }
            }

            return false;
        }