如何使用C＃在MongoDB中的对象数组中搜索字符串

Question

我的MongoDB中有以下记录。我想在“星期一”字段中搜索字符串。我想搜索“learningexperience”字段，以返回与该字段中某个单词匹配的任何文档。

不确定如何使用MongoDB / C＃。任何帮助都会很棒。

{
    "_id" : ObjectId("59ee623844bd6b042809d492"),
    "title" : "Zebra Room (2017-10-30)",
    "weekcommencing" : "2017-10-30", 
    "monday" : [ 
        {
            "categoryid" : "59ee610244bd6b042809d48d",
            "category" : "Culture & Community",
            "learningexperience" : "Dress up to reflect where i am from. Children are asked to dress in the national uniform of their origins."
        }, 
        {
            "categoryid" : "59edca4344bd6d1e200c3c32",
            "category" : "Literacy & Numeracy",
            "learningexperience" : "Today the children will be focusing on simple additions. For those more advance we will also have subtractions in place."
        }
]
}

Answer 1

如果您想使用％keyword％搜索它。你可以试试这个

db.tablename.find({"monday.learningexperience": /.*keyword.*/})

对于C＃，您可以尝试使用此过滤器（mongodb c＃driver 2.0或更高版本）

Builders<tablename>.Filter.Regex("monday.learningexperience", new BsonRegularExpression("keyword", "i"));