以編程方式檢索所有子代/后代/相關實體

Question

如何使用C＃在CRM Dynamics 2011中檢索源實體的所有相關實體？

謝謝

Answer 1

FetchXml不能滿足此要求，但是很顯然，如果您想構造FetchXml並將其用於QueryBase來代替QueryExpression我QueryBase您展示。 邏輯保持不變。

//Assumes you have a Entity() object of the parent entity
//somehow you have to know the parent entity record's Id

Guid parentId = parentEntity.Id;
var query = new QueryExpression("new_childentity");
query.Criteria.AddCondition(new ConditionExpression("new_lookupfield", ConditionOperator.Equal, parentId));
query.ColumnSet = new ColumnSet(true);
var results = service.RetrieveMultiple(query);
if (results.Entities.Any())
{
     //Do your processing here
}
else
{
     //Do whatever when there are no child entities
}