我正在按照this文章的指导，尝试在c#插件中更改我的业务流程阶段。我能够将阶段前进到下一阶段，但是当我尝试返回之前的阶段时，我收到一个错误。以下是我从动态UI中收到的错误。当我调试插件时，我收到了一个不包含任何信息的
FaultException<OrganizationServiceFault>异常。为什么会出现这个错误，我该如何修改代码以成功返回到我的业务流程流程中的上一个阶段？
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>
插件
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);
更改舞台
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
我发现了this篇文章，它解释了如何使用Web API更新舞台。但是当我尝试这种方法时，出现了以下错误：
在有效负载中找不到只有属性注释而没有属性值的未声明属性'activestageid'。在OData中，只有声明过的导航属性和声明过的命名流可以表示为没有值的属性。
我已经尝试了几种'activestageid'的变体，但都没有成功（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中括号内的ID（ccseq_bpf_clientsetups（###））是我从ccseq_bpf_clientsetups表中的BusinessProcessFlowInstanceId获取的。我从ProcessStageBase表中的ProcessStageId获取了processstages 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，并尝试运行他的工具生成的JavaScript代码。但是，该代码与我之前编写的代码完全相同，不幸的是并没有起作用。此时，我相当有信心，在Web API v8.2中不支持更改阶段。