Execute mongodb shell script via C# driver
I have read this question and haven't understand. Is there abili开发者_Python百科ty to execute arbitrary mongodb shell script via C# driver?
var mongoServer = MongoServer.Create("mongodb://<connectionstring>");
var database = mongoServer.GetDatabase("mydatabase");
string mycollectionCount database.Eval("function() { return db.mycollection.count(); }").ToString();
This is useful when you are trying to change property types for example like this:
string updateScript = @"
function () {
db.some_items.find().forEach(function(documentItem) {
documentItem.some_collection.forEach(function(collectionItem) {
if (typeof collectionItem.SomeProperty === 'number'
&& Math.floor(collectionItem.someProperty) === collectionItem.someProperty)
{
collectionItem.someProperty = '' + collectionItem.someProperty;
}
});
db.modules_elementary.save(documentItem);
});
return true;
}";
var updateResult = MongoReadDatabase.Database.Eval(updateScript).ToString();
if (updateResult != "true")
{
throw new ApplicationException("Update of something failed");
}
This code changes type of someProperty
which is element of a collection of a collection:
some_items mongo collection:
{
some_collection: [{ someProperty: 12, ....}],
....
}
No, you'd need launch a Mongo shell process, using something like Process.Start, and pass in the command you want to execute, e.g.
mongo.exe mydb --eval "printjson(db.getCollectionNames())"
However, the C# driver can do most things the shell can, so if possible it's much easier to use the driver directly.
I have not tried it but I think this is what you are looking for:
MongoServer.RunAdminCommand Method (String) http://api.mongodb.org/csharp/1.1/html/a83249ae-0989-7c24-7240-4506053d83c1.htm
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