C# simple operation example of adding, deleting, modifying and querying MongoDB

The current version of the C# driver used by MongoDB is 1.6.0

Download address: https://github.com/mongodb/mongo-csharp-driver/downloads

1, Connect to database

The code is as follows:
                                                                                                       private const string cOnn= “mongodb://127.0.0.1:27017”;
                                                                                                                                                                 string dbName = “mongodb_name”;
                                                                                                                                                                                                                           //Create a data connection
              MongoServer server = MongoServer.Create(conn); col = db.GetCollection(tbName);

2. Insert data

Because MongoDB does not have the concept of a table, you must define your own data model before inserting data

User.cs

The following is the code for adding data

The code is as follows:
                                                                                                                                      // Content
/// Article ID
/// Channel ID
///
public static void Add(User t)
{
//Create data connection
MongoServer server = MongoServer.Create (conn);
//Get the specified database
Insert
col.Insert(t);

}

3. Delete operation

The code is as follows:
                                                                                                                                                                  >         ///
          public static void Delete(string objId)
                                                                                                                                                                          ; /P>

IMongoQuery query = Query.EQ(“_id”, new ObjectId(objId));

          col.Remove(query);
                                                                                                                                                                                                . Summary>
/// Modify according to ObjectID
///
  public static void Update(User t)
{
//Create data connection
MongoServer server = MongoServer.Create(conn);
//Get the specified database
MongoDatabase db = server .GetDatabase(dbName);
//Get the table

            BsonDocument bd = BsonExtensionMethods.ToBsonDocument(t);

IMongoQuery query = Query.EQ(“_id”, t.Id);

    col.Update(query, new UpdateDocument(bd));

}

5. Conditional query (simple)

The code is as follows:
                                                                                                                                                           > Public static TuCao SelectOne(string objId)
{
//Create a data connection
MongoServer server = MongoServer.Create(conn);
//Get the specified database
b = server. GetDatabase(dbName);
//Get the table
MongoCollection col = db.GetCollection(tbName);
//Conditional query Return col.FindOne(Query.EQ( “_id”, new ObjectId(objId)));
       }

6. Query all

The code is as follows:
                                                                                                                                                                  public static void SelectAll()
 {
 List list = new List();

                                                                                                                                          MongoServer server =                                                    Br> Mongocollection Col ​​= db.getCollection (tbname);
// Query all
List.addrage (colorFindall ());

            //——————————–
            foreach (TuCao t in col.FindAll() 🙂 }
}