Question

在CRM 4.0中，我的存储库中有通用方法：

public T GetEntityById(Guid id)
{
    var entities =
        from e in m_context.GetEntities(typeof (T).Name)
        where e.GetPropertyValue<Guid>(IdentityFieldName) == id
        select e;
    return (T) entities.FirstOrDefault();
}

但CRM 2011呢？错过了ICrmEntity和GetPropertyValue方法......

通过ID获取通用实体的替代方法是什么？

Answer 1

像(T) m_context.Retrieve(typeof (T).Name, id, new ColumnSet())这样的东西见here

Answer 2

在寻找相同的答案时发现了这个问题，这就是我最终解决问题的方法。

    public T GetEntityByID<T>(Guid guid) where T : Entity
    {
        return (T) (_organizationService.Retrieve((typeof(T)).Name, guid, new ColumnSet()));
    }

Answer 3

你真的想要使用ToEntity方法，而不是使用。有时typeof（T）.Name会有大小写差异，所以我也写了一个帮助函数：

/// <summary>
/// Retrieves the Entity of the given type with the given Id, with the given columns
/// </summary>
/// <typeparam name="T">An early bound Entity Type</typeparam>
/// <param name="service">open IOrganizationService</param>
/// <param name="id">Primary Key of Entity</param>
/// <param name="columnSet">Columns to retrieve</param>
/// <returns></returns>
public static T GetEntity<T>(this IOrganizationService service, Guid id, ColumnSet columnSet)
    where T : Entity
{
    return service.Retrieve(EntityHelper.GetEntityLogicalName<T>(), id, columnSet).ToEntity<T>()
}

public static string GetEntityLogicalName<T>() where T : Entity
{
    return GetEntityLogicalName(typeof(T));
}

public static string GetEntityLogicalName(Type type)
{
    var field = type.GetField("EntityLogicalName");
    if (field == null)
    {
        if (type == typeof(Entity))
        {
            return "entity";
        }
        else
        {
            throw new Exception("Type " + type.FullName + " does not contain an EntityLogicalName Field");
        }
    }
    return (string)field.GetValue(null);
}

Microsoft Dynamics CRM 2011.按ID获取实体的通用方法

3 个答案: