mongodb-.net-driver

问题 I have the following data table: { "_id" : ObjectId("value"), "owner" : "testuser", "date" : ISODate("2017-03-16T12:45:03.386Z"), "location" : "thuis", "venue" : "bijna thuis", "description" : "fghgfh", "completed" : false, "winnerName" : null, "subscriptions" : [], "interactions" : [ { "_id" : ObjectId("objectid"), "owner" : "testuser", "type" : "guess", "date" : ISODate("2017-03-06T12:13:10.049Z"), "answer" : false, "message" : "test 1" }, { "_id" : ObjectId("objectid"), "owner" : "testuser

问题 I have following class hierarchy for object stored in mongodb (I store only Branch objects and Entities in their graph) public class Branch : Aggregate { public IEnumerable<LocalizableText> Description { get; set; } public ObjectId PartnerId { get; set; } public double Latitude { get; set; } public double Longitude { get; set; } public string Timetable { get; set; } public IEnumerable<Discount> Discounts { get; set; } public IEnumerable<Category> Categories { get; set; } public IEnumerable

问题 I have the following code using the popular PredicateBuilder from albahari.com: var predicate = PredicateBuilder.False<Message>(); predicate.Or(p => p.Subject.Contains("a")); var test = this.MongoConnectionHandler.MongoCollection.AsQueryable().Where(predicate).ToList(); return this.MongoConnectionHandler.MongoCollection.AsQueryable().Count(predicate); The problem is that it doesn't return anything even though there are records in that column which contain the letter 'a'. Removing the

问题 I would like of create a trigger where, to each subdocument inserted would increment in other collection a field, for generate a count of subdocuments that collection. I tried create a search using MapReduce, but for Milions of the Registries is very slow. Note: I use C#, but if you like show how to do in Bson, no problem. Extructure my collection public class Header { public Header() { Operation= new List<Operation>(); } public ObjectId Id { get; set; } public Int64 Code1 {get; set;} public

问题 I have been trying to pass in a dynamic list of Expressions to a MongoDB C# Driver query using Linq ... This method works for me with regular Linq queries against an ORM, for example, but results in an error when applied to a MongoDB query ... (FYI: I am also using LinqKit's PredicateBuilder) // // I create a List of Expressions which I can then add individual predicates to on an // "as-needed" basis. var filters = new List<Expression<Func<Session, Boolean>>>(); // // If the Region

问题 I would like to allowDiskUse:true. However I could not found any example which explain allowDiskUse enabling for MongoDB C# driver. How can I enable allowDiskUse in MongoDB C# driver? My sample code like that var pipeline = new[] { match, project, group, limit, sort, allow }; List<SMBMostInfluentialUser> result = db .GetCollection<SMBTwitterStatus>("TwitterStatus") .Aggregate(pipeline).ResultDocuments.Select(x => new User { Influence = Convert.ToDouble(x["Influence"]), User = new SMBUser(

问题 how do we rename embedded fields using C# with mongoDB ? An example of document Person would be: { Id: 1, LastName: "Smith", FirstName: "John", Orders: { Id: 1, Name: "Trousers" // I want to rename **Name** into **Something** } } With mongoDB syntax, it would be something like db.Users.update({}, {$rename:{"Orders.Name":"Orders.Something"}},true, true) Thanks. 回答1: Look at MongoDB.Driver.Builders.Update.Rename(string oldElementName, string newElementName) It returns an IUpdateQuery, which you

问题 I have following application: application deployment diagram A - Application A is a .net wcf service hosted in IIS 7.5 using c# mongodriver 2.2.4 compiled in .net 4.5 B - Application B is a windows service application using mongodriver 1.11 compiled in .net 3.5 Both services are similar, service B is maintained for legacy systems and service A is under evolution. Both applications are hosted in same servers. (Windows Standard 2008 R2) This applications had been running for more than 1 year

问题 Please tell me how make search by fields-arrays? I have some fields of type List<Int64> . For example first document has field-array with numbers [1,2,3,4] and second document has such field with numbers [4,5,6,7]. I want to find documents where my field consists 3 and 4 numbers, so it is first document. I am looking for examples that are based on official MongoDB C# driver;) Thank you very much!!! 回答1: You should use Query.All() . Code like this: var array = new List<int>() {3, 4}; var query

问题 I have installed the current development version 3.3.11 in order to test the case insensitive index that is apparently supported according to https://jira.mongodb.org/browse/SERVER-90. I have tried this from a mongo shell and a simple test database and it does seem to work. Unfortunately, even though one specifies collation (and strength) during index creation, one must also specify the same collation params with .find in order to get case insensitive matches. If collation is omitted from the