原理是先以列表或数组的形式赋
在Init的时候
string[] branchApprovers = strBranchApprovers.Split(',');
repBranchApprove.InitialChildData = branchApprovers;
repBranchApprove.ExecutionType = ExecutionType.Parallel;
创建任务的时候根据currentIndex获取数据
repBranchApprove.CurrentChildData[currentIndex].ToString();