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Dynamics CRM products and bundles in a order

I am experimenting with the example CalculatePrice on the Dynamics CRM example page.
And im having a hard time understanding how to get products and bundles in a good manner.
What i wanna try and do is get products from an order with a productstructure attribute and a producttypecode. But it seems whatever i try i get a error The given key was not present in the dictionary.
The query below should look for productID from salesorder based on productID
QueryExpression query = new QueryExpression("salesorderdetail");
query.ColumnSet.AddColumns("quantity", "salesorderispricelocked", "priceperunit", "producttypecode", "_productid_value");
query.Criteria.AddCondition("salesorderid", ConditionOperator.Equal, entity.Id);
QueryExpression query2 = new QueryExpression("product");
query2.ColumnSet.AddColumns("productstructure", "productnumber" , "productid");
query.Criteria.AddCondition("productid", ConditionOperator.Equal, ec.Entities["_productid_value"]);
Then i try to iterate the list of objects to see if they have productstructure and their producttypecode
for (int i = 0; i < ec.Entities.Count; i++)
{
if (ec.Entities[i].GetAttributeValue<int>("producttypecode") == 6)
{ you are a product
if (ec.Entities[i].GetAttributeValue<int>("productstructure") == 3){ you are a bundle
This is the link to the sample code i use:
https://learn.microsoft.com/en-us/dynamics365/customer-engagement/developer/sample-calculate-price-plugin

For starters, the _productid_value notation is the WebAPI's way to access a lookup field. To access the productid using the SDK's late-bound paradigm, use:
myEntity["productid"] or
myEntity.GetAttributeValue<Guid>("productid") or
myEntity.GetAttributeValue<EntityReference>("productid").
Beyond that, since Product is a lookup on the OrderDetail, using a couple LinkEntity objects you could get away with a single query.
I would probably use LINQ and do something like this:
private void getProducts(Guid salesOrderId)
{
using (var context = new Microsoft.Xrm.Sdk.Client.OrganizationServiceContext(svc))
{
var query = from od in context.CreateQuery("salesorderdetail")
join so in context.CreateQuery("salesorder")
on od.GetAttributeValue<Guid>("salesorderid") equals so.GetAttributeValue<Guid>("salesorderid")
join p in context.CreateQuery("product")
on od.GetAttributeValue<Guid>("productid") equals p.GetAttributeValue<Guid>("productid")
where od.GetAttributeValue<Guid>("salesorderid").Equals(salesOrderId)
select new
{
OrderDetailId = od.GetAttributeValue<Guid>("salesorderdetailid"),
ProductId = od.GetAttributeValue<EntityReference>("productid"),
Quantity = od.GetAttributeValue<decimal?>("quantity"),
IsPriceLocked = so.GetAttributeValue<bool?>("ispricelocked"),
PricePerUnit = od.GetAttributeValue<Money>("priceperunit"),
ProductTypeCode = od.GetAttributeValue<OptionSetValue>("producttypecode"),
ProductStructure = p.GetAttributeValue<OptionSetValue>("productstructure"),
ProductNumber = p.GetAttributeValue<string>("productnumber")
};
var results = query.ToList();
var products = results.Where(e => e.ProductStructure.Value == 6).ToList();
var bundles = results.Where(e => e.ProductStructure.Value == 3).ToList();
}
}
Please note that local variables results, products, and bundles are an anonymous type. You can loop through and access the properties of each object, but there's also a strong chance you'd want to cast them into instances of a real class.

Query Row count from Grouped EF query

I have this query to group the levels of a particular row in EF
var awards = from a in context.Awards
where a.TWID == employee.TWID
group a by a.AwardLevel;
This gives me the awards for each level (1-4) what I'm trying to figure out is how to extract the count from the awards for a specific level.
ie: level1.count,level2.count etc.
I know this should be some simple lambda expression or something but I just can't get it.
UPDATE What I'm looking for is a way NOT to write 4 different queries. For example:
var level1 = awards.Level[0]
var level2 = awards.Level[1]

Try:
var awards = from a in context.Awards
where a.TWID == employee.TWID
group a by a.AwardLevel into award
select new
{
AwardLevel = award.Key,
Count = award.Count()
};
Update based on updated question:
var awards = (from a in context.Awards
where a.TWID == employee.TWID
group a by a.AwardLevel into award
select new
{
AwardLevel = award.Key,
Count = award.Count()
}).ToDictionary( t => t.AwardLevel, t => t.Count );

The LINQ expression contains references to queries that are associated with different contexts

Here's my code:
var myStrings = (from x in db1.MyStrings.Where(x => homeStrings.Contains(x.Content))
join y in db2.MyStaticStringTranslations on x.Id equals y.id
select new MyStringModel()
{
Id = x.Id,
Original = x.Content,
Translation = y.translation
}).ToList();
And I get the error that the specified LINQ expression contains references to queries that are associated with different contexts. I know that the problem is that I try to access tables from both db1 and db2, but how do I fix this?

MyStrings is a small table
Load filtered MyStrings in memory, then join with MyStaticStringTranslations using LINQ:
// Read the small table into memory, and make a dictionary from it.
// The last step will use this dictionary for joining.
var byId = db1.MyStrings
.Where(x => homeStrings.Contains(x.Content))
.ToDictionary(s => s.Id);
// Extract the keys. We will need them to filter the big table
var ids = byId.Keys.ToList();
// Bring in only the relevant records
var myStrings = db2.MyStaticStringTranslations
.Where(y => ids.Contains(y.id))
.AsEnumerable() // Make sure the joining is done in memory
.Select(y => new {
Id = y.id
// Use y.id to look up the content from the dictionary
, Original = byId[y.id].Content
, Translation = y.translation
});

You are right that db1 and db2 can't be used in the same Linq expression. x and y have to be joined in this process and not by a Linq provider. Try this:
var x = db1.MyStrings.Where(xx => homeStrings.Contains(xx.Content)).ToEnumerable();
var y = db2.MyStaticStringTranslations.ToEnumerable();
var myStrings = (from a in x
join b in y on x.Id equals y.id
select new MyStringModel()
{
Id = x.Id,
Original = x.Content,
Translation = y.translation
}).ToList();
Refer to this answer for more details: The specified LINQ expression contains references to queries that are associated with different contexts
dasblinkenlight's answer has a better overall approach than this. In this answer I'm trying to minimize the diff against your original code.

I also faced the same problem:
"The specified LINQ expression contains references to queries that are associated with different contexts."
This is because it's not able to connect to two context at a time so i find the solution as below.
Here in this example I want to list the lottery cards with the owner name but the Table having the owner name is in another Database.So I made two context DB1Context and DB2Context.and write the code as follows:
var query = from lc in db1.LotteryCardMaster
from om in db2.OwnerMaster
where lc.IsActive == 1
select new
{
lc.CashCardID,
lc.CashCardNO,
om.PersonnelName,
lc.Status
};
AB.LottryList = new List<LotteryCardMaster>();
foreach (var result in query)
{
AB.LottryList.Add(new LotteryCardMaster()
{
CashCardID = result.CashCardID,
CashCardNO = result.CashCardNO,
PersonnelName =result.PersonnelName,
Status = result.Status
});
}
but this gives me the above error so i found the other way to perform joining on two tables from diffrent database.and that way is as below.
var query = from lc in db1.LotteryCardMaster
where lc.IsActive == 1
select new
{
lc.CashCardID,
lc.CashCardNO,
om.PersonnelName,
lc.Status
};
AB.LottryList = new List<LotteryCardMaster>();
foreach (var result in query)
{
AB.LottryList.Add(new LotteryCardMaster()
{
CashCardID = result.CashCardID,
CashCardNO = result.CashCardNO,
PersonnelName =db2.OwnerMaster.FirstOrDefault(x=>x.OwnerID== result.OwnerID).OwnerName,
Status = result.Status
});
}

LINQ query with SELECT and two GROUP-BY condition

What's the equivalent LINQ instruction for a Datatable of the following SQL query:
SELECT code_direction, count(TP) AS CN
FROM table1
WHERE cod_time = 'A011'
GROUP BY TP,code_direction;
and how to get the result into a new datatable?
I tried to convert it but I there're some errors. Someone could take a look on this:
var query = from t in table1.AsEnumerable()
group t by new { t.TP, t.code_direction }
into grp
select new
{
grp.Key.code_direction,
CN = grp.Count(t.TP)
};
foreach (var x in query)
{
Console.Write(x.code_direction);
Console.Write(x.CN);
}

As far as your first question goes. The LINQ equivalent of the SQL query is:
var query = from t in table1.AsEnumerable()
where t.cod_time == "A011"
group t by new { t.TP, t.code_direction }
into grp
select new
{
grp.Key.code_direction,
CN = grp.Count()
};
Note that you don't have to pass any argument to grp.Count(). (For the obvious reason that in SQL COUNT(TP) is the same as COUNT(*), i.e. just count the number of rows. The story would be different if you'd use COUNT(DISTINCT TP) or similar.)
As far as the second question goes, if your query just returned an IEnumerable<T> where T is DataRow (i.e. a query like table1.AsEnumerable().Where(r => r.cod_time == "A011")) then you could just the DataTableExtensions.CopyToDataTable extension method. As your query returns an anonymous type however, you will have to follow these instructions found on MSDN.

I Have been using LINQ to work on a JSON object returned from a remote sharepoint web service. I have posted this because most of the answers I found online were slightly different from what I needed.
a json list of daily activities is returned from a remote sharepoint list & is then summarised using LINQ
The simplified version of a custom object definition is shown below( & which is defined in the models area of an MVC application)
public class MyCustomObjectList
{
public string eventdate { get; set; }
public string userid { get; set; }
public string action { get; set; }
}
The JSON object is serialised into a MyCustomObjectList array.
var customobject = serializer.Deserialize<MyCustomObjectList>(jsonobject);
I wanted to work out how many actions of each type happened on a given day. NB eventdate is stored as a string in format yyyy-mm-dd hh:MM:ss. This was to simplify conversions between c#, JSON & Jquery ( where required I create DateTime objects elsewhere in the code using the
eventdate.
Some will argue this is inefficient, but I prefer to split processes into a sequential set of really simple operations, for the sake of easier debugging & to help other people follow my code. Thats why there are 2 Linq queries .
querya strips out the time component from the eventdate This ensures our later grouping happens by day, & not by second. To be doubly sure that there is no caching, I create it in a new field called actionday. I also rename action to activity, because intellisense was getting confused!! The other columns are copied as is.
var querya =
from c in customobject.rows
select new { actionday = c.eventdate.Substring(0, 10), activity = c.action, c.userid,
c.eventdate };
/* queryb produces a grouped count of querya, grouped on actionday & activity, creating new columns actionkey,ActionCount,Dte,action & DetailList ( which is a summary for debugging purposes)
*/
var queryb=
from p in querya group p by new { p.actionday, p.activity} into idGroup
actionkey = idGroup.Key,
ActionCount = idGroup.Count(),
Dte = idGroup.Key.actionday,
action = idGroup.Key.activity,
DetailList = idGroup
};
Here’s a version that sumarises by 3 columns
var queryc = from p in querya
group p by new { p.actionday, p.userid, p.activity} into idGroup
select new
{
actionday = idGroup.Key,
ActionCount = idGroup.Count(),
userid = idGroup.Key.userid,
Dte = idGroup.Key.actionday,
action = idGroup.Key.activity,
DetailList = idGroup
};

Getting rid of nested foreach loops when using linq

I am always finding myself creating linq expressions that still use nested foreach loops heavily. Below is a simple example of what I'm talking about, and I'd really appreciate it if someone on here can show me how to condense this low-efficiency code into a single linq expression?
The database context (db) has three tables: Blog, Tag, Junc_Tag_Blog. The junction table simply stores a record of blogs with their tags.
Anyway, here's my messy code:
public static Collection<Blog> GetByTag(string tagName)
{
// Get the tag record.
var tag = (from t in db.Tags
where t.Name == tagName
select t).Single();
// Get the list of all junction table records.
var tagJunc = from tj in db.Junc_Tag_Blogs
where tj.Fk_Tag_Id == tag.Id
select tj;
// Get a list of all blogs.
var blogs = from b in db.BlogPosts
select b;
// Work out if each blog is associated with given tag.
foreach(var blog in blogs)
{
foreach(var junc in tagJunc)
{
if(blog.Id == junc.Fk_Blog_Id)
{
// We have a match! - do something with this result.
}
}
}
}
Thanks in advance to the person who can help me clean this code up!

You can construct a query that lets the database find the matches for you.
List<Blog> blogs =
(
from t in tag
where t.Name == tagName
from tj in t.Junc_Tag_Blogs
let b = tj.Blog
select b
).ToList();

var blogsWithGivenTag =
from blog in db.BlogPosts
where blog.BlogTags.Any(bt => bt.Tag.Name == tagName)
select blog;

Read about performing inner joins with LINQ.

You can put the blogs in a dictionary, group the junctions on the blog id, and loop through the groups:
var blogDict = blogs.ToDictionary(b => b.Id);
foreach(var group in tagJunk.GroupBy(j => j.Fk_Blog_Id)) {
if (blogDict.ContainsKey(group.Key)) {
var blog = blogDict[group.Key];
foreach (var junction in group) {
// here you have the blog and the junction
}
}
}
This is also nested loops, but for each blog you only loop through the junctions that actually belong to that blog, instead of all junctions.