Question

I am storing class object in mongodb like below,

try
{
    Sample risk = new Sample();
    risk.Name = "ABC";
    risk.Enable = true;
    risk.Sender = "IBM";
    risk.Target = "CITI";
    MongoServer server = MongoServer.Create("mongodb://localhost");
    MongoDatabase db = server.GetDatabase("DATABASE");
    db.GetCollection<StockQuote>("SMAPLETABLE").Insert(risk);
}
catch (Exception e)
{
    MessageBox.Show("Error");
}

now i want to to update that same class instance like db.GetCollection<StockQuote>("SMAPLETABLE").Insert(risk); how can i do this one.

Answer 1

There is two approaches two update document:

1.Via Save method and update etire document

db.GetCollection<StockQuote>("SMAPLETABLE").Save(risk);

2.Via atomic update: update part of document. For example if you need update Enable field of document with Name “ABC“:

db.GetCollection<StockQuote>("SMAPLETABLE").Update(
                                        Query.EQ("Name", "ABC"),
                                        Update.Set("Enable", false));

Some notes:

1. With atomic updates you can avoid concurrency issues. Atomic update it is like transaction within one document.