/// <summary>
        /// 流程图
        /// </summary>
        /// <param name="instanceId">实例ID</param>
        /// <returns></returns>
        public async Task <IActionResult> FlowImage(Guid flowid, Guid?instanceId)
        {
            var instance = await _workFlowInstanceService.GetFlowImageAsync(flowid, instanceId);

            return(View(instance));
        }
 public async Task <WorkFlowImageDto> GetFlowImageAsync(Guid flowid, Guid?instanceId)
 {
     return(await _workFlowInstanceService.GetFlowImageAsync(flowid, instanceId));
 }