Angular4中的checkbox 全选按钮启用禁用

 
Logout Warnning
 
Your have working order(s). if you logout the order(s) will be returned to the Pick Queue and all unconfirmed handling units will remove. Do you want to continue logout"table">    Phase CodeDeliveryProduct    {{task.phaseCode}}  {{task.saP_DeliveryOrder_ID}}  {{task.saP_ProductOrder_ID|removeLeadingZeros}} 
 Release and logoutLogout only

​​checkAll(ev: any) {​​ ​​this.releaseTasks.releaseTaskDetails.forEach((x:any) => x.isChecked = ev.target.checked)​​ ​​ }​​ ​​isAllChecked() {​​ ​​if(this.releaseTasks.releaseTaskDetails.length > 0​​ ​​return this.canRelease = this.releaseTasks.releaseTaskDetails.every((_:any) => _.isChecked);​​ ​​ }​​ ​​return false;​​ ​​ }​​ ​​​​​​ onModalSelectedRows(task : any) { task. isChecked = ! task. isChecked; let len = 0; this. releaseTasks. releaseTaskDetails. forEach((item : any) => if( item. isChecked) { len ++; } }); if( len === 0) { this. canRelease = false; else{ this. canRelease = true; } } ​​​​后台的viewmodel代码​​

var activityQuery = from op in _context.OperatorActivities where op.Operator_ID == userName && !op.IsComplete && !op.IsReleased && !op.IsException select op; ReleaseTask relesaseTask = new ReleaseTask(); if(activityQuery.Any()){ foreach (var activity in activityQuery) { ReleaseTaskViewModel taskDetail = new ReleaseTaskViewModel(); taskDetail.SAP_DeliveryOrder_ID = getOrderById(activity.DeliveryOrder_ID); taskDetail.SAP_ProductOrder_ID = getProductOrderById(activity.ProductionOrder_ID); taskDetail.PhaseCode = activity.ActivityCode; taskDetail.isChecked = true; taskDetail.OperatorActivityId = activity.OperatorActivity_ID; taskDetail.DeliveryOrder_ID = activity.DeliveryOrder_ID; taskDetail.ProductionOrder_ID = activity.ProductionOrder_ID; taskDetail.Operator_ID = activity.Operator_ID; taskDetail.OrderId = activity.ActivityCode == "MAKE" ? activity.ProductionOrder_ID : activity.DeliveryOrder_ID; taskDetail.isPersistent = isPersistent(activity.ProductionOrder_ID); if(!taskDetail.isPersistent) { relesaseTask.ReleaseTaskDetails.Add(taskDetail); } } } return(Ok(new { success = true, data = relesaseTask}));