Version 2.0 of the C# driver for MongoDB.
Questions tagged [mongodb-csharp-2.0]
187 questions
1
vote
2 answers
How can I complete a string concatenation inside a project stage using C# and the Mongo aggregation pipeline?
I'm trying to perform a string concatenation within a project stage of a MongoDb aggregation pipeline operation.
I need to add a field called "coid" to a document, which is to be the result of a string concation between 2 strings:
the string…
DalhousieDuck
- 329
- 1
- 16
1
vote
0 answers
MongoDB C# Driver Projection and Serialization
I have got a working code to join two mongo collections using $lookup.
[HttpGet("mongojoin")]
public IActionResult GetMongoJoinCollection([FromQuery(Name = "schoolId")] Guid schoolId)
{
var tabAssessmentCollection…
Ajeesh Joshy
- 1,387
- 2
- 18
- 32
1
vote
1 answer
How to use formula (or Expression) to update value using Mongo DB C# Drivers 4.2?
I am quite new to MongoDb (and MongoDb C# Drivers) and lately, we are trying to implement an update wherein we use the value of a field and a variable (method parameter) to update several fields.
Basically, our doc is something like this
public…
Charles -
- 13
- 3
1
vote
1 answer
Update document with its value
Need to update a document based its value
var filter = Builders.Filter.Empty;
var update = Builders.Update.Set(i => i.JobDuration,…
user2972244
- 31
- 3
1
vote
2 answers
Distinct count with group fails though count is working fine
I'm trying to convert a sql server query to Mongo C# driver LINQ.
I have a table with multiple entries for each guid and each entry has different code value.
I need get a distinct count of guids for each code. I'm able to do Count()in LINQ but when…
gatsby
- 11
- 4
1
vote
2 answers
Projection after Group
I'm trying to make a Projection right after a Group clause in my C# application but I'm getting "doesn't contain definition for 'Project' " error.
Mongo DB - Code that has worked:
var pipeline =
[
{
$match:{
externalId:…
Glenn Mateus
- 319
- 1
- 2
- 17
1
vote
1 answer
C# Mongo DB driver - expression with method call not working
I'm trying to query some data and projecting to a class with fewer properties by sending an expression (C# mongo driver version 2.7.3).
I am trying to understand why a specific expression fails.
The failure greatly limits the user from writing a…
Metheny
- 1,112
- 1
- 11
- 23
1
vote
0 answers
Mongodb c# ElemMatch not working on array
i am trying to fetch element based on a property of a sub collection.
var filter = Builders.Filter.ElemMatch(x => x.BusinessRequestStatuses, x => x.RequestId == requestId);
var res = await…
Raas Masood
- 1,475
- 3
- 23
- 61
1
vote
0 answers
Filtering in mongo by interface
I have a mongo collection that I want to type to an interface. It should be able to contain multiple concrete types, all of which implement this interface. However when making queries if I use the interface it tells me that it cannot find…
Chris
- 27,210
- 6
- 71
- 92
1
vote
1 answer
How do I skip duplicate documents in a bulk insert and ignore duplicates with a specific field c#
I need to insert many documents and ignore the duplicated docs.
Doc format:
_id:5b84e2588aceda018a974450
Name:"Jeff M"
Email:"jeff.m@xtrastaff.com"
Type:"Client"
UserId:Binary('Rw+KMGpSAECQ3gwCtfoKUg==')
UserImage:null
I want to check the…
Ajas Aju
- 725
- 7
- 30
1
vote
1 answer
Find Distinct Count in MongoDB using C# (mongocsharpdriver)
I have a MongoDB collection, and I need to find the distinct count of records after running a filter.
This is what I have right now,
var filter = Builders.Filter.Eq("bar", "1");
db.GetCollection("FooTable").Distinct("zoo",…
coder_andy
- 376
- 1
- 3
- 17
1
vote
1 answer
MongoDB selecting key value pairs using C# driver
I have a MongoDB collection that looks similar to this:
{
_id : 1,
key : "key1",
value : [ "val11", "val12"]
}
{
_id : 2,
key : "key2",
value : [ "val21", "val22", "val23"]
}
I'd like to get a List of MyObjects ( MyObject consisting of…
Darkersan
- 21
- 2
1
vote
1 answer
Password Special Charecter issue in mongoDB?
Error : Password Special Character issue in mongoDB
Code:
connstr="mongodb://test:test@123@67.186.193.192:27017/testdb"
Here i changed password "test@123" to "test%4123" . Because @ ASCII code is %4
Now it is working fine.
MongoClient client = new…
user8221107
1
vote
2 answers
How to replace only not sent null fields in mongodb
How to replace only not sent null fields.
My Product Instance:
Product p1 = new Product(){ Name : "Apple", Money: 2 };
My Document:
{
"Id" : 1
"Name" : "Apppple",
"Money" : 3,
"Color" : "Red"
}
I runned this code:
var _filterDef =…
Biletbak.com
- 409
- 5
- 14
1
vote
1 answer
How To Set Properties Dynamically In The MongoDB C# Driver
I have created an extension method that accepts a JObject and generates an update definition for the C# MongoDB Driver. The idea is that the properties and values in the JObject are used to map to and update properties in the database. However, the…
John Louderback
- 99
- 10