Question

当我将注释链接到特定实体时，而不是创建这样的关系：

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

是否可以强类型方式引用该关系：

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

我们可以用同样的方式引用特定的1：N关系：

SalesOrder.Relationships.SalesOrder_Annotation

Answer 1

如果您使用SDK（tf.diag_...）中提供的标准RelationshipSchemaNameAttribute应用程序生成代码，则您要查找的值将存储在代码属性CrmSvcUtil.exe中。我已经使用SDK（\SDK\Bin\CrmSvcUtil.exe）中提供的早期绑定实体类文件在控制台应用程序中验证了此代码。

按如下方式调用方法（根据您的示例）：

\SDK\SampleCode\CS\HelperCode\MyOrganizationCrmSdkTypes.cs

或者，如果要返回实际的字符串值：

var relationship = GetRelationship<SalesOrder>(nameof(SalesOrder.SalesOrder_Annotation))

将此代码添加到应用程序中的帮助程序类：

var relationshipName = GetRelationshipSchemaName<SalesOrder>(nameof(SalesOrder.SalesOrder_Annotation))

这是您更新后的代码：

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);
}

Answer 2

第二个想法，我的t4模板答案似乎有点矫枉过正您可以使用表达式树和扩展方法轻松获得所需内容

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;

namespace ConsoleApplication9
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            Relationship r = new Class1().GetRelationShip(s => s.RelationShipProperty);
            Console.WriteLine(r.Name);
            System.Console.ReadLine();
        }
    }

    public static class MyExtention
    {
        public static Relationship GetRelationShip<T, TProperty>(this T t, Expression<Func<T, TProperty>> expression)
        {
            return new Relationship(((expression.Body as MemberExpression).Member as PropertyInfo)
                    .GetCustomAttributes(typeof(RelationshipAttribute))
                    .Select(a=>(RelationshipAttribute)a)
                    .First().Name
                    );
        }
    }

    public class RelationshipAttribute : System.Attribute
    {
        public string Name { get; set; }

        public RelationshipAttribute(string name)
        {
            Name = name;
        }
    }

    public class Relationship
    {
        public string Name { get; set; }

        public Relationship(string name)
        {
            Name = name;
        }
    }

    public class Class1
    {
        [Relationship("RelationShipA")]
        public List<int> RelationShipProperty { get; set; }
    }
}

Answer 3

根据您的说法，您生成的类具有一个属性，其中包含您的关系名称您只需要一个t4模板，它可以为您的Relationships

生成一个具有强类型属性的类

假设您的项目中包含以下代码

namespace ConsoleApplication9
{
    public class RelationshipAttribute : System.Attribute
    {
        public string Name { get; set; }

        public RelationshipAttribute(string name) { Name = name; }
    }

    [Relationship("RelationShipA")]
    public class Class1 { }

    [Relationship("RelationShipB")]
    public class Class2 { }

    [Relationship("RelationShipC")]
    public class Class3 { }

}

此模板

<#@ template debug="false" hostspecific="false" language="C#" #>
<#@ assembly name="System" #>
<#@ assembly name="System.Core" #>
<#@ assembly name="$(TargetPath)" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System" #>
<#@ import namespace="System.Reflection" #>
<#@ output extension=".cs" #>

namespace YourNameSpace
{
   public static class Relationships
   {
      <# 
         var types = typeof(ConsoleApplication9.RelationshipAttribute).Assembly
                     .GetTypes()
                     .Select(t => new { t.Name, Value = t.GetCustomAttribute(typeof(ConsoleApplication9.RelationshipAttribute)) })
                     .Where(t => t.Value != null)
                     .Select(t=> new { t.Name,Value= ((ConsoleApplication9.RelationshipAttribute)t.Value).Name })
                     .ToList();

                 foreach (var attr in types)
  { #>
 public static class  <#=  attr.Name #>
        {
            public const string <#=  attr.Value #> = "<#=  attr.Value #>";
        }
      <# }

  #>}
}

将生成以下.cs文件

namespace YourNameSpace
{
   public static class Relationships
   {
         public static class  Class1
         {
           public const string RelationShipA = "RelationShipA";
         }
         public static class  Class2
         {
           public const string RelationShipB = "RelationShipB";
         }
         public static class  Class3
         {
           public const string RelationShipC = "RelationShipC";
         }
   }
}

然后你可以像

一样使用它

Relationship = new Relationship(Relationships.Class1.RelationShipA )

Answer 4

我不确定我的问题是否正确。 C＃6.0功能nameof(...)不会做这件事吗？

即

new Relationship(nameof(RelationshipSalesOrder.Relationships.SalesOrder_Annotation));

Answer 5

XrmToolBox中的Early Bound Generator将为您生成这些关系名称。

public static class Fields
{
    public const string AccountId = "accountid";
    public const string AccountRoleCode = "accountrolecode";
    public const string Address1_AddressId = "address1_addressid";
    // *** SNIP *** 
    public const string YomiLastName = "yomilastname";
    public const string YomiMiddleName = "yomimiddlename";
    public const string business_unit_contacts = "business_unit_contacts";
    public const string contact_customer_accounts = "contact_customer_accounts";
    public const string Referencingcontact_customer_contacts = "contact_customer_contacts";
    public const string Referencingcontact_master_contact = "contact_master_contact";
    public const string contact_owning_user = "contact_owning_user";
    public const string lk_contact_createdonbehalfby = "lk_contact_createdonbehalfby";
    public const string lk_contact_modifiedonbehalfby = "lk_contact_modifiedonbehalfby";
    public const string lk_contactbase_createdby = "lk_contactbase_createdby";
    public const string lk_contactbase_modifiedby = "lk_contactbase_modifiedby";
    public const string system_user_contacts = "system_user_contacts";
}

获得早期关系

5 个答案: