我们如何解决ex.Message = "Unable to cast object of type 'MongoDB.Bson.ObjectId' to type 'MongoDB.Bson.BsonValue'."？

Question

全部：

插入 MongoDB 数据库后，我无法将类型 'MongoDB.Bson.ObjectId' 的对象转换为类型 'MongoDB.Bson.BsonValue'

       ELLCsInterfaceLogEvent aLogEvent = null;
        try
        {

            MongoDB.Bson.ObjectId  UmbrellaLogIdAsObjectId = (ObjectId)UmbrellaLogId;
            BsonDocument logEventBsonDoc = new BsonDocument { 
                                    {"UmbrellaLogId",(BsonValue)UmbrellaLogIdAsObjectId}
                                 }; // end of new BsonDocument
            objUtility = new Utility();
            objUtility.Insert(logEventBsonDoc, "FMS_TM_MST_LogEvents");
            string[] arrFields = { "UmbrellaLogId" };
            IMongoQuery query = Query.EQ("UserID", (BsonValue)UmbrellaLogId);
           aLogEvent = DBConnection.database.GetCollection<ELLCsLogEvent>("FMS_TM_MST_LogEvents")
                                          .Find(query).SetFields(arrFields).ToList<ELLCsInterfaceLogEvent>().FirstOrDefault();

        }
        catch (Exception ex)
        {
            string something = ex.Message;
        }

如何在无法将类型 'MongoDB.Bson.ObjectId' 的对象转换为类型 'MongoDB.Bson.BsonValue' 之间轻松转换？

Answer 1

抱歉，误报了。这是一个愚蠢的编程错误。
在我检查是否插入条目的查询中，我没有进行转换。

正确代码如下：

        ELLCsInterfaceLogEvent aLogEvent = null;
        try
        {
            //BsonValue bval = MongoDB.Bson.BsonValue((ObjectId)UmbrellaLogId);
            //new MongoDB.Bson.BsonValue((ObjectId)UmbrellaLogId);
            MongoDB.Bson.ObjectId  UmbrellaLogIdAsObjectId = (ObjectId)UmbrellaLogId;
            BsonDocument logEventBsonDoc = new BsonDocument { 
                                    {"UmbrellaLogId",(BsonValue)UmbrellaLogIdAsObjectId}
                                 }; // end of new BsonDocument
            objUtility = new Utility();
            objUtility.Insert(logEventBsonDoc, "FMS_TM_MST_LogEvents");
            string[] arrFields = { "UmbrellaLogId" };
            IMongoQuery query = Query.EQ("UmbrellaLogId", (BsonValue)UmbrellaLogIdAsObjectId);
           aLogEvent = DBConnection.database.GetCollection<ELLCsLogEvent>("FMS_TM_MST_LogEvents")
                                          .Find(query).SetFields(arrFields).ToList<ELLCsInterfaceLogEvent>().FirstOrDefault();

        }
        catch (Exception ex)
        {
            string something = ex.Message;
        }
        return aLogEvent;

我们如何解决ex.Message = "Unable to cast object of type 'MongoDB.Bson.ObjectId' to type 'MongoDB.Bson.BsonValue'."？

How do we resolve ex.Message = "Unable to cast object of type 'MongoDB.Bson.ObjectId' to type 'MongoDB.Bson.BsonValue'."?

c#

casting

mongodb

bson

objectid