在C#插件中更改业务流程阶段

Question

我正在关注这篇文章,以便在ac#插件中更改我的业务流程流程.我能够将舞台向前推进到下一个舞台,但是当我尝试回到前一阶段时,我收到了一个错误.以下错误是我在Dynamics的UI中收到的错误.当我调试插件时,我收到一个FaultException<OrganizationServiceFault>不包含任何信息的异常.为什么我收到错误？如何修改代码以成功返回业务流程的前一阶段？

错误

Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: An unexpected error occurred.
Detail: <OrganizationServiceFault xmlns="http://schemas.microsoft.com/xrm/2011/Contracts" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  <ActivityId>5df51362-b7c1-4817-a8d0-de2d63b15c17</ActivityId>
  <ErrorCode>-2147220970</ErrorCode>
  <ErrorDetails xmlns:a="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
  <Message>An unexpected error occurred.</Message>
  <Timestamp>2018-07-19T18:55:42.6625925Z</Timestamp>
  <ExceptionSource i:nil="true" />
  <InnerFault>
    <ActivityId>5df51362-b7c1-4817-a8d0-de2d63b15c17</ActivityId>
    <ErrorCode>-2147220970</ErrorCode>
    <ErrorDetails xmlns:a="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
    <Message>System.NullReferenceException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #0D309052</Message>
    <Timestamp>2018-07-19T18:55:42.6625925Z</Timestamp>
    <ExceptionSource i:nil="true" />
    <InnerFault i:nil="true" />
    <OriginalException i:nil="true" />
    <TraceText i:nil="true" />
  </InnerFault>
  <OriginalException i:nil="true" />
  <TraceText i:nil="true" />
</OrganizationServiceFault>

插入

if (localContext == null)
{
    throw new ArgumentNullException("localContext");
}

IPluginExecutionContext context = localContext.PluginExecutionContext;
IOrganizationService service = localContext.OrganizationService;

Client client = (Client)service.Retrieve(
    Client.LogicalName,
    new Guid("75FE165F-848B-E811-80F3-005056B33317"),
    new ColumnSet(new String[]{
        Client.Properties.ClientId
    })
);

client.ChangeStage(service);

改变阶段

public void ChangeStage(IOrganizationService service)
{
    // Get Process Instances
    RetrieveProcessInstancesRequest processInstanceRequest = new RetrieveProcessInstancesRequest
    {
        EntityId = this.Id,
        EntityLogicalName = this.LogicalName
    };

    RetrieveProcessInstancesResponse processInstanceResponse = (RetrieveProcessInstancesResponse)service.Execute(processInstanceRequest);

    // Declare variables to store values returned in response
    int processCount = processInstanceResponse.Processes.Entities.Count;
    Entity activeProcessInstance = processInstanceResponse.Processes.Entities[0]; // First record is the active process instance
    Guid activeProcessInstanceID = activeProcessInstance.Id; // Id of the active process instance, which will be used later to retrieve the active path of the process instance

    // Retrieve the active stage ID of in the active process instance
    Guid activeStageID = new Guid(activeProcessInstance.Attributes["processstageid"].ToString());

    // Retrieve the process stages in the active path of the current process instance
    RetrieveActivePathRequest pathReq = new RetrieveActivePathRequest
    {
        ProcessInstanceId = activeProcessInstanceID
    };
    RetrieveActivePathResponse pathResp = (RetrieveActivePathResponse)service.Execute(pathReq);

    string activeStageName = "";
    int activeStagePosition = -1;

    Console.WriteLine("\nRetrieved stages in the active path of the process instance:");
    for (int i = 0; i < pathResp.ProcessStages.Entities.Count; i++)
    {
        // Retrieve the active stage name and active stage position based on the activeStageId for the process instance
        if (pathResp.ProcessStages.Entities[i].Attributes["processstageid"].ToString() == activeStageID.ToString())
        {
            activeStageName = pathResp.ProcessStages.Entities[i].Attributes["stagename"].ToString();
            activeStagePosition = i;
        }
    }

    // Retrieve the stage ID of the next stage that you want to set as active
    activeStageID = (Guid)pathResp.ProcessStages.Entities[activeStagePosition - 1].Attributes["processstageid"];

    // Retrieve the process instance record to update its active stage
    ColumnSet cols1 = new ColumnSet();
    cols1.AddColumn("activestageid");
    Entity retrievedProcessInstance = service.Retrieve("ccseq_bpf_clientsetup", activeProcessInstanceID, cols1);

    // Set the next stage as the active stage
    retrievedProcessInstance["activestageid"] = new EntityReference(ProcessStage.LogicalName, activeStageID);
    service.Update(retrievedProcessInstance);
}

---

更新

我发现这篇文章解释了如何使用Web API更新舞台.当我尝试这种方法时,我收到错误:

未声明的属性"activestageid",其在有效负载中仅具有属性注释,但在有效负载中未找到属性值.在OData中,只有声明的导航属性和声明的命名流可以表示为没有值的属性.

我尝试了几种'activestageid'而没有成功(ActiveStageId,_ activestageid_value).

---

更新2

根据Arun的反馈,我尝试了以下Web API调用但没有成功.url(ccseq_bpf_clientsetups(###))括号内的ID是从ccseq_bpf_clientsetups表上的BusinessProcessFlowInstanceId中提取的.我从ProcessStageBase表中的ProcessStageId中提取的进程阶段ID

// Attempt 1
PATCH /COHEN/api/data/v8.2/ccseq_bpf_clientsetups(bc892aec-2594-e811-80f4-005056b33317) HTTP/1.1
{ "ActiveStageID@odata.bind": "/processstages(70018854-db7c-4612-915b-2ad7870a8574)"}

// Attempt 2
PATCH /COHEN/api/data/v8.2/ccseq_bpf_clientsetups(bc892aec-2594-e811-80f4-005056b33317) HTTP/1.1
{ "activestageid@odata.bind": "/processstages(70018854-db7c-4612-915b-2ad7870a8574)"}

// Attempt 3
PATCH /COHEN/api/data/v8.2/ccseq_bpf_clientsetups(bc892aec-2594-e811-80f4-005056b33317) HTTP/1.1
{ "ActiveStageId@odata.bind": "/processstages(70018854-db7c-4612-915b-2ad7870a8574)"}

---

更新3

我下载了jLattimer的CRM Rest Builder并尝试运行他生成的JavaScript工具.代码与我之前写的相同,但不幸的是没有用.在这一点上,我非常有信心在Web API的v8.2中不支持更改阶段.

Answer 1

我有一些代码尝试将业务流程阶段向前推进，作为自定义工作流程步骤（而不是插件）。我已经在下面发布了。

我看到的区别是：

• 我正在前进（而不是后退）
• 我可能没有遵循最佳实践:)
• 我没有检索active path，我只是获取该过程的所有可用阶段
• 我也在设置TraversedPath属性

代码：

var activeInstancesRequest = new RetrieveProcessInstancesRequest
{
    EntityId          = TargetEntity.Id,
    EntityLogicalName = TargetEntity.LogicalName
};
var activeInstancesResponse = (RetrieveProcessInstancesResponse)base.OrgService.Execute(activeInstancesRequest);
var process = activeInstancesResponse.Processes.Entities.Select(x => x.ToEntity<BusinessProcessFlowInstance>()).ToList();
var stages = base.XrmContext.ProcessStageSet
    .Where(s => s.ProcessId.Id == process.FirstOrDefault().ProcessId.Id)
    .Select(s => new ProcessStage
    {
        ProcessStageId = s.ProcessStageId,
        StageName = s.StageName
    })
    .ToList();

var targetStage = stages.Where(stage => stage.StageName == targetStageName).FirstOrDefault();
if (targetStage != null)
{
    crmWorkflowContext.Trace($"BPF contains target stage (\"{targetStageName}\"). Attempting to update BPF");

    // Setting the Traversed Path is necessary for the Business Process Flow to show the active Stage
    // If this is not updated then although the new Stage is set as current, the previous Stage remains actively selected
    var traversedPath = $"{bpf.TraversedPath},{targetStage.ProcessStageId.Value}";
    var update = new BusinessProcessFlowInstance()
    {
        BusinessProcessFlowInstanceId = bpf.BusinessProcessFlowInstanceId,
        ProcessStageId                = targetStage.ProcessStageId,
        TraversedPath                 = traversedPath   
    };

    xrmContext.Attach(update);
    xrmContext.UpdateObject(update);
}