CRM 插件 PreImage 不更新相关实体

Question

我是开发新手，但在为 Dynamics CRM 创建插件时遇到了问题。当字段 primarycontactid 更新为其他内容时更新了它被 linked 到的帐户实体时，该插件应该在联系人实体上呈现 parentcustomerid 字段 null，或者在 linked 上为 null另一个联系人。

使用我目前编写的代码，不会抛出任何错误并且代码执行成功，但 parentcustomerid 字段仍然包含帐户，当它应该删除 link 时，它也是 linked。

这是我目前的代码：

    public void Execute(IServiceProvider serviceProvider)
    {       
            ITracingService tracingService = (ITracingService)serviceProvider.GetService(typeof(ITracingService));


            //Obtain the execution context
            IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));

            //obtain organizational services
            IOrganizationServiceFactory serviceFactory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));
            IOrganizationService service = serviceFactory.CreateOrganizationService(context.UserId);

            EntityReference prePCID;
            Entity PreImage;
            // The InputParameters collection contains all the data passed in the message request.
            if (context.InputParameters.Contains("Target") &&
                context.InputParameters["Target"] is Entity)
            {
                // Obtain the image entity from the Pre Entity Images.
                tracingService.Trace
                    ("trace1: Getting the target entity from Input Parameters.");
                PreImage = (Entity)context.InputParameters["Target"];

                // Verify that the target entity represents an account.
                // If not, this plug-in was not registered correctly.
                tracingService.Trace
                   ("trace2: Verifying that the target entity represents a account.");
                if (PreImage.LogicalName == "account")
                {
                    if (PreImage.Attributes.Contains("primarycontactid"))
                    {
                        tracingService.Trace
                            ("trace3: Setting the primary contact id in the prePCID.");
                    //prePCID = (EntityReference)PreImage.Attributes["primarycontactid"];
                    prePCID = (EntityReference)PreImage["primarycontactid"];

                        tracingService.Trace
                            ("trace4: Primary Contact Name: " + prePCID.Name + " Creating a variable that stores the contact using the prePCID.");
                        Entity contactToRemoveReference = service.Retrieve("contact", prePCID.Id, new ColumnSet("parentcustomerid")) as Entity;
                        tracingService.Trace
                            ("trace5: Removes the id: " + prePCID.Id + " of the parentcustomerid.");
                        contactToRemoveReference.Attributes["parentcustomerid"] = null;

                        service.Update(contactToRemoveReference);
                        tracingService.Trace
                            ("trace6: Execution Successful.");
                    }
                } 

        }

}

如果有人能帮我解决这个问题，那将是非常感谢。

Answer 1

您正在从输入参数中的主要实体填充实体变量 PreImage。我认为你应该从 Pre image 中获取它，例如：

Entity PreImage;
if (context.PreEntityImages.Contains("yourPreImageName") && context.PreEntityImages["yourPreImageName"] != null)
{
    PreImage = context.PreEntityImages["yourPreImageName"];
}

CRM 插件 PreImage 不更新相关实体

CRM plugin PreImage not updating related entity

c#

plugins

dynamics-crm