The System.Linq.Dynamic.Core.DynamicExpressionParser class defines the static ParseLambda method for dynamically parsing and creating lambda expressions. All families and.Dynamic LINQ DynamicExpressionParser ParseLambda Methods. Getting values by Property Name or Collection Index.Starting with v7, the XrmToolkit LINQ query provider can now be deployed to all Dynamics365 instances, whether online or on-premise.Influence, The POOL The LINQ Updates: Influence Pool will only be available for guests 21 and older beginning effective Thursday. The index methods on JObject/JArray let you quickly get data by its property name on an object or index in a collection, while Children () lets you get ranges of data as IEnumerable to then query using LINQ. LINQ to JSON provides a number of methods for getting data from its objects.For example, query contacts that have not had any activities in the last 30 days. Ability to create a left outer join for querying records where something is NOT present. Ability to create simple aggregate queries like 'Sum', 'Min', 'Max', 'Count', and 'Average' including the use of grouping. This is helpful if you need 'Read-only' properties like 'Created On' or 'Modified On' to be returned. Specify columns to return.
Linq Online How To Perform ThisMicrosoft documentation here.// Retrieve a count of the distinct states being used in the contacts address. Microsoft documentation here.// Retrieve a list of accounts that are owned by me or my reports.Where(x => x.Owner.OwnedByMeOrMyReports())// Retrieve a list of opportunities that closed in the current fiscal period.Where(x => x.ActualCloseDate.Value.ThisFiscalPeriod())// Retrieve a list of opportunities that closed last week.Where(x => x.ActualCloseDate.Value.LastWeek())Group By Time Periods (fiscal or regular)You can query and group results by time periods and return one or multiple aggregates// Retrieve a list of opportunities where the contacts first name is 'Jane', status reason = 'Won', group by the 'Fiscal Period'// and return the 'FiscalPeriods', 'Count', Sum('ActualRevenue'), Average('ActualRevenue'), Sum('EstimatedRevenue')Var results = (from o in this.Service.Queryable()Join c in this.Service.Queryable() on o.Contact.Id equals c.ContactIdWhere o.StatusReason = Opportunity_StatusReason.WonGroup o by o.ActualCloseDate.Value.ThisFiscalPeriod() into gTotalRevenue = g.Sum(x => x.ActualRevenue),AverageRevenue = g.Average(x => x.ActualRevenue),TotalEstimatedRevenue = g.Sum(x => x.EstRevenue),Use the 'Between' operator for numeric, money, or datetime columns:// Retrieve a list of opportunities that closed between 2 dates.Where(x => x.ActualCloseDate.Between(minDate, maxDate))See what FetchXml is being executed for a query by using the 'ToFetchXml' extension method:Var queryFetchXml = this.Service.Queryable()Supports the 'ColumnCount' operator with/without the use of the 'Distinct' modifier. Microsoft documentation here.// Compare the 'Actual Revenue' to the 'Budget Amount'Var opportunities = this.Service.Queryable().Where(x => x.ActualRevenue > x.BudgetAmount)Query hierarchical data. The enhanced query providerAllows you to simply query the "Id" property of the "Entity" instead of first knowing what the logical name is:Var entity = (from a in CrmQueryFactory.Queryable(_service, "account")Ability to use column comparison. The following are examples of how to perform this:Var summation = (from a in Linq.CrmQueryFactory.Queryable(_service)Where a.AccountName.Contains("ABC Company")Var average = (from a in Linq.CrmQueryFactory.Queryable(_service)Select a.CreditLimitMoney.Value).Average() Var min = (from a in Linq.CrmQueryFactory.Queryable(_service)Var max = (from a in Linq.CrmQueryFactory.Queryable(_service)Var count = (from a in Linq.CrmQueryFactory.Queryable(_service)Select a.CreditLimitMoney.Value).Count() // Determine the count of distinct valuesVar result = (from a in Linq.CrmQueryFactory.Queryable(_service)Select a.AccountName).Distinct().Count() Var groups = (from a in Linq.CrmQueryFactory.Queryable(_service)Where a.AccountName.Contains("ABC Company") & a.CreditLimitMoney.Value > 5000Group a.CreditLimitMoney.Value by a.AccountName into gHave you ever needed to query based on something that didn't exist? For example: which contacts do NOT have an activity linked to them (where the 'Regarding' object is set to the contact)? Below is an example of how this can be done.The key is in the join and the "where" clause specifying that the "Regarding.Id = null":// Query the contacts that do not have an activity associated to themVar query = from c in Linq.CrmQueryFactory.Queryable(_service)Join t in Linq.CrmQueryFactory.Queryable(_service)On c.ContactId equals t.Regarding.Id into ctWhen working with late bound entities, if you need to retrieve an object by its Id, then you first need to know what the logical name of the Id is, ie for Accounts it is "accountid".
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