Question

我想添加对using (var db = new LiteRepository("lite.db")) { db.Insert(new User { Name = "John" }); var user = db.Query<User>() .Where(x => x.Name == "JOHN") .FirstOrDefault(); // proposal return John var fail = db.Query<User>() .Where(x => string.Equals(x.Name, "JOHN", StringComparison.OrdinalIgnoreCase)) .FirstOrDefault(); // throw exception }的引用，而不是在每个html块中编写*ngSwitchCase代码从这个角度来看（来自角度文档）：

ng-template

想要这样做：

<div *ngIf="show; then thenBlock; else elseBlock">this is ignored</div>
<ng-template #primaryBlock>Primary text to show</ng-template>

而不是：

<div [ngSwitch]="switchVar">
  <div *ngSwitchCase="1; then myTemplate"></div>
  <div *ngSwitchDefault>output2</div>
</div>
<ng-template #myTemplate>HTML TEXT</ng-template>

Answer 1

可以通过ngTemplateOutlet实现。第二个模板还演示了传递上下文的能力。

<div [ngSwitch]="switchVar">
  <div *ngSwitchCase="1">
    <ng-container *ngTemplateOutlet="tmplFirst"></ng-container>
  </div>
  <div *ngSwitchDefault>
    <ng-container *ngTemplateOutlet="tmplSecondWithContext; context: {bar: 42}"></ng-container>
  </div>
</div>

<ng-template #tmplFirst>HTML TEXT</ng-template>
<ng-template #tmplSecondWithContext let-foo="bar">Output: {{foo}}</ng-template>

在ngSwitch中使用ng-template参考

1 个答案: