範例：使用 QueryExpression 類別取得多個

 

發行︰ 2017年1月

適用於： Dynamics 365 (online)、Dynamics 365 (on-premises)、Dynamics CRM 2016、Dynamics CRM Online

需求

如需執行此 SDK 所提供範例程式碼的需求資訊，請參閱使用範例和 Helper 程式碼。

範例

此範例顯示如何使用 RetrieveMultiple 方法搭配 QueryExpression 和其他相關的實體列來擷取多個實體。 此代碼回傳來自主要客戶紀錄欄，還有與客戶關聯的主要連絡人的姓和名。

static void RetrieveMultipleWithRelatedEntityColumns()
{
    Console.WriteLine("Entering:RetrieveMultipleWithRelatedEntityColumns");
    //Create multiple accounts with primary contacts
    Entity contact = new Entity("contact");
    contact.Attributes["firstname"] = "ContactFirstName";
    contact.Attributes["lastname"] = "ContactLastName";
    Guid contactId = _orgService.Create(contact, null);

    Entity account = new Entity("account");
    account["name"] = "Test Account1";
    EntityReference primaryContactId = new EntityReference("contact", contactId);
    account["primarycontactid"] = primaryContactId;

    Guid accountId1 = _orgService.Create(account, null);
    account["name"] = "Test Account2";
    Guid accountId2 = _orgService.Create(account, null);
    account["name"] = "Test Account3";
    Guid accountId3 = _orgService.Create(account, null);

    //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 = "account";
    qe.ColumnSet = new ColumnSet();
    qe.ColumnSet.Columns.Add("name");

    qe.LinkEntities.Add(new LinkEntity("account", "contact", "primarycontactid", "contactid", JoinOperator.Inner));
    qe.LinkEntities[0].Columns.AddColumns("firstname", "lastname");
    qe.LinkEntities[0].EntityAlias = "primarycontact";

    EntityCollection ec = _orgService.RetrieveMultiple(qe);

    Console.WriteLine("Retrieved {0} entities", ec.Entities.Count);
    foreach (Entity act in ec.Entities)
    {
       Console.WriteLine("account name:" + act["name"]);
       Console.WriteLine("primary contact first name:" + act["primarycontact.firstname"]);
       Console.WriteLine("primary contact last name:" + act["primarycontact.lastname"]);
    }
}

另請參閱

IOrganizationService
RetrieveMultiple
QueryExpression
QueryExpression
使用 QueryExpression 類別
使用 QueryExpression 建立查詢
範例：在 Fetch 與 QueryExpression 之間轉換查詢

Microsoft Dynamics 365

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