c# - 建立早恋关系

当我将注释链接到特定实体时，而不是像这样创建关系:

var associateRequest = new AssociateRequest
{
    Target = new EntityReference(SalesOrder.EntityLogicalName, salesOrderGuid),
    RelatedEntities = new EntityReferenceCollection
    {
        new EntityReference(Annotation.EntityLogicalName, noteGuid),
    },
    Relationship = new Relationship("SalesOrder_Annotation")
};

是否可以以强类型方式引用关系:

var associateRequest = new AssociateRequest
{
    Target = new EntityReference(SalesOrder.EntityLogicalName, salesOrderGuid),
    RelatedEntities = new EntityReferenceCollection
    {
        new EntityReference(Annotation.EntityLogicalName, noteGuid)
    },
    Relationship = SalesOrder.Relationships.SalesOrder_Annotation // <----- ???
};

这类似于能够在开发时获取逻辑名:

SalesOrder.EntityLogicalName

我们能否以相同的方式引用特定的1:N关系:

SalesOrder.Relationships.SalesOrder_Annotation

最佳答案

如果您使用SDK中提供的标准RelationshipSchemaNameAttribute应用程序(CrmSvcUtil.exe)生成代码，则所要查找的值存储在code属性\SDK\Bin\CrmSvcUtil.exe中。我已经使用SDK中提供的早期绑定(bind)实体类文件(\SDK\SampleCode\CS\HelperCode\MyOrganizationCrmSdkTypes.cs)在控制台应用程序中验证了此代码。

调用方法如下(根据您的示例):
var relationship = GetRelationship<SalesOrder>(nameof(SalesOrder.SalesOrder_Annotation))
或者，如果您想返回实际的字符串值:
var relationshipName = GetRelationshipSchemaName<SalesOrder>(nameof(SalesOrder.SalesOrder_Annotation))
将此代码添加到应用程序中的帮助器类:

public static string GetRelationshipSchemaName<T>(string relationshipPropertyName) where T:Entity
{
    return typeof (T).GetProperties()
        .FirstOrDefault(x => x.Name == relationshipPropertyName)
        .GetCustomAttributes()
        .OfType<RelationshipSchemaNameAttribute>()
        .FirstOrDefault()
        ?.SchemaName;
}

public static Relationship GetRelationship<T>(string relationshipPropertyName) where T : Entity
{
    return new Relationship(typeof(T).GetProperties()
        .FirstOrDefault(x => x.Name == relationshipPropertyName)
        .GetCustomAttributes()
        .OfType<RelationshipSchemaNameAttribute>()
        .FirstOrDefault()
        ?.SchemaName);
}

这是您更新后的代码的样子:

var associateRequest = new AssociateRequest
                                   {
                                       Target =
                                           new EntityReference(
                                               SalesOrder.EntityLogicalName,
                                               salesOrderGuid),
                                       RelatedEntities =
                                           new EntityReferenceCollection
                                               {
                                                   new EntityReference(
                                                       Annotation
                                                           .EntityLogicalName,
                                                       noteGuid)
                                               },
                                       Relationship = GetRelationship<SalesOrder>(nameof(SalesOrder.SalesOrder_Annotation)) ///////////????
                                   };