MongoDB C＃ - 如何将过滤器应用于所有字段

Question

如何在所有字段上应用此Regex过滤器：

var collection = _DB.GetCollection<BsonDocument>(table);

FilterDefinition<BsonDocument> filter = Builders<BsonDocument>.Filter.Regex(__ANY FIELD__, BsonRegularExpression.Create(new Regex(".*" + searchString + ".*", RegexOptions.IgnoreCase)));

var documents = await collection.Find(filter).ToListAsync();

Answer 1

显然，即使使用本机MongoDB语法（refer here）直接在控制台中也无法做到这一点

所以我最后提到所有字段并对过滤器进行ORing，如下所示：

var collection = _DB.GetCollection<BsonDocument>(table);

FilterDefinition<BsonDocument> filter;

foreach (Field field in allFields)
{
    if (filter == null)
        filter = Builders<BsonDocument>.Filter.Regex(field.Name, BsonRegularExpression.Create(new Regex(".*" + searchString + ".*", RegexOptions.IgnoreCase)));
    else
        filter = filter | Builders<BsonDocument>.Filter.Regex(col.Name, BsonRegularExpression.Create(new Regex(".*" + searchString + ".*", RegexOptions.IgnoreCase)));
}

var documents = await collection.Find(filter).ToListAsync();