c# - Microsoft Dynamics CRM 工作流教程不起作用

Question

我正在尝试按照教程进行操作: https://msdn.microsoft.com/en-us/library/gg509012.aspx

但是，当我到达线路时:

protected override void Execute(CodeActivityContext executionContext)
{
    IWorkflowContext context = executionContext.GetExtension<IWorkflowContext>();

    //Create an Organization Service
    IOrganizationServiceFactory serviceFactory = executionContext.GetExtension<IOrganizationServiceFactory>();
    IOrganizationService service = serviceFactory.CreateOrganizationService(context.InitiatingUserId);

    //Retrieve the contact id
    Guid contactId = this.Contact.Get(executionContext).Id;
}

它在 C# 中给出错误。

C# 'Program' does not contain a definition for 'Contact' and no extension method 'Contact' accepting a first argument of type 'Program' could be found are you missing a using directive or an assembly reference?

什么是this.Contact？

Answer 1

Contact 是自定义事件工作流的 in 参数

//Define the properties
[RequiredArgument]
[Input("Update Next Birthdate for")]
[ReferenceTarget("contact")]

public InArgument<EntityReference> Contact { get; set; }

protected override void Execute(CodeActivityContext executionContext)
{
    IWorkflowContext context = executionContext.GetExtension<IWorkflowContext>();

    //Create an Organization Service
    IOrganizationServiceFactory serviceFactory = executionContext.GetExtension<IOrganizationServiceFactory>();
    IOrganizationService service = serviceFactory.CreateOrganizationService(context.InitiatingUserId);

    //Retrieve the contact id
    Guid contactId = this.Contact.Get(executionContext).Id;
}

当您从工作流或操作调用自定义时，您必须发送所需的输入参数，例如联系人。