在Dynamics CRM中加入約會實體所需的與會者和聯繫人實體

Question

我想以編程方式提取所有約會實體及其所需的與會者的全部信息（在我的案例中始終爲聯繫人類型）。

基於約會實體「必需參加者」屬性，在約會實體和聯繫人實體之間加入最佳方式是什麼？

Answer 1

要獲得'所需參加者'，您需要在Appointment和ActivityParty實體之間進行連接，然後根據ParticipationTypeMask進行過濾，這對於'所需參加者'爲5。 此外，您需要在ActivityParty和Contact實體之間進行連接。

你的代碼可能是與此類似：

//Create a query expression specifying the link entity alias 
//and the columns of the link entity that you want to return 
QueryExpression qe = new QueryExpression(); 
qe.EntityName = "appointment"; 
qe.ColumnSet = new ColumnSet(true); 

//LinkEntity for ActivityParty     
var activityParty = new LinkEntity() 
{ 
    EntityAlias = "activityparty", 
    JoinOperator = JoinOperator.Inner, 
    Columns = new ColumnSet(true), 
    LinkFromEntityName = "appointment", 
    LinkFromAttributeName = "activityid", 
    LinkToEntityName = "activityparty", 
    LinkToAttributeName = "activityid", 
    LinkCriteria = new FilterExpression 
    { 
     Conditions = 
        { 
         new ConditionExpression("participationtypemask", ConditionOperator.Equal, 5), //Required Attendees 
         new ConditionExpression("partyobjecttypecode", ConditionOperator.Equal, 2), // Contacts 
        } 
    } 
}; 

//LinkEntity for Contact     
var contact = new LinkEntity() 
{ 
    EntityAlias = "contact", 
    JoinOperator = JoinOperator.Inner, 
    Columns = new ColumnSet(true), 
    LinkFromEntityName = "activityparty", 
    LinkFromAttributeName = "partyid", 
    LinkToEntityName = "contact", 
    LinkToAttributeName = "contactid", 
}; 

activityParty.LinkEntities.Add(contact); 
qe.LinkEntities.Add(activityParty); 

//Get the appointments and the Linked Entities 
var appointments = _orgService.RetrieveMultiple(qe); 

foreach (var appointment in appointments.Entities) 
{ 
    // Do something with the Contact Data 
    var fullname = ((AliasedValue)(appointment["contact.fullname"])).Value.ToString(); 
}