query-expressions

问题 I am trying to get the FetchXML query for a specific query expression fro Dynamics CRM. I have manged to do it using the XRM SDK in a C# project as follows. string connectionStr = @"Server=https://mycompany.com/XRMServices/2011/Organization.svc; Username=theUserName; Password=pwd"; Microsoft.Xrm.Client.CrmConnection conn = Microsoft.Xrm.Client.CrmConnection.Parse(connectionStr); var service = new Microsoft.Xrm.Client.CrmOrganizationServiceContext(conn); var query = new QueryExpression();

问题 We found out that Linq for CRM 2011 is horribly broken - it seems to have gotten in without any QA performed on it. An indicator as how badly broken the provider is a query like .Where(x => x== "b") works but this .Where(x => "b" == x) might not depending on some preceding condition like a join statement. I have actually had to rewrite parts of the query provider and am enjoying better luck with the crap I put together. However this can't go on, there are still other issues and I'm not paid

问题 I've been looking for a MongoDb-like ( http://docs.mongodb.org/manual/applications/read/#find, docs.mongodb.org/manual/reference/operators/ ) query expression object evaluation function implementation or a class. It may cover not all the advanced features, and should have extensible architecture. MongoDB-like query expression objects are easy for understanding and usage , providing ability to write clean, self-explaining code, because both query and objects to search in, are associative

问题 I have this SQL query where I am trying to fetch the opportunityId from opportunity entity for whom approvaldocument has not been created (approval document is the name of the other entity) .I dont think fetchxml supports such kind of query. I am new to crm and my project is in crm 4.0 version. here's the sql query: Select OpportunityId from opportunity AS c left JOIN (select a.opportunitynameid from opportunity o JOIN ApprovalDocument a ON a.opportunitynameid=o.OpportunityId) AS b ON c

问题 I am new to CRM development. I have a Custom Entity "customer". This Entity has a Field called "defaultcustomer", which can be TRUE or FALSE. I am working on a Plug-In where i need to set the "defaultcustomer" to FALSE for all the "Customers". I am doing it as below: FACTS: I have registered the plugin for the entity "customer" itself. So when the Entity "customer" is updated, the plugin fires. private void MakeAllNonDefault() { try { QueryExpression query = new QueryExpression("customer");

问题 When I design a QueryExpression , I've always used the following, hard-coded syntax. QueryExpression expression = new QueryExpression { EntityName = "account"; ... } In this blog the following syntax based on this enumeration is used. QueryExpression expression = new QueryExpression { EntityName = EntityName.account.ToString(); ... } I liked it much better but I couldn't find it using intellisense. Then I've found this discussion where it's explained that the syntax is deprecated. So, what

问题 Below are two queries that return the same data. Other then style I am not sure which is better. What factors influence these queries? What are the benefits of using one style over the other? Sample 1 var x = from s in db.Surveys join sq in db.Survey_Questions on s.ID equals sq.Survey_ID join q in db.Questions on sq.Question_ID equals q.ID join qg in db.Question_Groups on q.ID equals qg.Question_ID where s.Type_ID.Equals(typeID) & s.Type.Equals(type) select new { question = sq.Question,

问题 I'm building the following query. For some reason, it doesn't bring to me all the fields. I've checked the spelling and when I assign values to those field, I even switched the name, leading to an exception. So I know for sure that they exist and are used. I'm adding a pre-image to the update-step with all data, just to be sure. QueryExpression request = new QueryExpression { EntityName = "myLogicalName", ColumnSet = new ColumnSet { AllColumns = true }, Criteria = { Filters = { new

问题 The documentation for leftOuterJoin Query Expressions on MSDN repeatedly implies through the samples that when using leftOuterJoin .. on .. into .. that you must still use .DefaultIfEmpty() to achieve the desired effect. I don't believe this is necessary because I get the same results in both of these tests which differ only in that the second one does not .DefaultIfEpmty() type Test = A | B | C let G = [| A; B; C|] let H = [| A; C; C|] printfn "%A" <| query { for g in G do leftOuterJoin h in

问题 I'm using QueryExpression often but this far, it's been a straigh-forward get-this-from-that or put-this-in-that. Recently, I learned that there's something called LinkedEntity and I started looking for it. As an example I got inspired by a related question here on SO and I started to create an expression for getting all the members of a list given it's guid. All the examples I've found follow the same pattern, though - as this example illustrates. From this question, I've learned that it's