什么是实体引用和查询表达式？请举一些简单的例子
What is entity reference and Query Expression ? Please give some simple examples
什么是 EntityReference 和 QueryExpression？请给我一些简单的例子。
It is used for lookup fields in
365 – e.g. to link records via a 1 to many relationship. The lookup
field is shown on the ‘child’. You need to specify the ‘parent’ entity
type and record id.
For example 如果您正在创建帐户并想设置主要联系人。
Entity account = new Entity("account");
account["name"] = "James Account";
account["primarycontactid"] = new EntityReference("contact", contactId);
service.Create(account);
QueryExpression provides an object model to construct a query. Queries
can also be created using FetchXML, a proprietary XML based query
language.
例如，您想要检索所有联系人的全名和电话号码。
QueryExpression query = new QueryExpression()
{
Distinct = false,
EntityName = Contact.EntityLogicalName,
ColumnSet = new ColumnSet("fullname", "address1_telephone1"),
};
DataCollection<Entity> entityCollection = _service.RetrieveMultiple(query).Entities;
什么是 EntityReference 和 QueryExpression？请给我一些简单的例子。
It is used for lookup fields in 365 – e.g. to link records via a 1 to many relationship. The lookup field is shown on the ‘child’. You need to specify the ‘parent’ entity type and record id.
For example 如果您正在创建帐户并想设置主要联系人。
Entity account = new Entity("account"); account["name"] = "James Account"; account["primarycontactid"] = new EntityReference("contact", contactId); service.Create(account);
QueryExpression provides an object model to construct a query. Queries can also be created using FetchXML, a proprietary XML based query language.
例如，您想要检索所有联系人的全名和电话号码。
QueryExpression query = new QueryExpression()
{
Distinct = false,
EntityName = Contact.EntityLogicalName,
ColumnSet = new ColumnSet("fullname", "address1_telephone1"),
};
DataCollection<Entity> entityCollection = _service.RetrieveMultiple(query).Entities;