数据库
首页 > 数据库> > 无法使用MongoDB C#2.0驱动程序查询字典项

无法使用MongoDB C#2.0驱动程序查询字典项

作者:互联网

我有一个具有字典属性的类.

    [DataMember]
    [BsonElement("QueriableParameters")]
    public Dictionary<string, string> QueriableParameters
    {
        get;
        set;
    }

我正在使用新的MongoDB c#2.0驱动程序,但似乎无法做到这一点:

var selectQuery1 = await collection.Find(s => s.QueriableParameters["UniqueLoanNumber"] == "3049793b-91eb-49d8-a5b4-7cbfd1a1bb3c").ToListAsync();

我收到此错误说明:

InnerException: System.InvalidOperationException
   HResult=-2146233079
   Message=s.QueriableParameters.get_Item("UniqueLoanNumber") is not supported.
   Source=MongoDB.Driver
   StackTrace:
        at MongoDB.Driver.Linq.Translators.PredicateTranslator.GetSerializationInfo(Expression expression)
        at MongoDB.Driver.Linq.Translators.PredicateTranslator.BuildComparisonQuery(Expression variableExpression, ExpressionType operatorType, ConstantExpression constantExpression)

请帮我指出正确的方向.

谢谢,

解决方法:

谢谢Craig提供的信息.

我想现在唯一的方法是:

var builders = Builders<NotificationData>.Filter;
var filter = builders.Eq("QueriableParameters.UniqueLoanNumber", "theIdLookingfor");
var selectQuery = await collection.Find(filter).ToListAsync();

标签:mongodb,mongodb-net-driver,mongodb-csharp-2-0,c
来源: https://codeday.me/bug/20191120/2044439.html