每行的 mat-table 中的 formGroup 数组 [英] Array of formGroup within mat-table for each row

问题描述

我有一个 formGroup 数组，其中每个元素代表一个表单.接下来我有一个 mat 表，我想要做的是将每个 tr(所以每一行)生成为一个不同的形式，以便表的第 i 行链接到第 i 个表单组.所以在第 i 行内，每个 td 元素都包含一个输入，并且这个输入应该链接到第 i 个 formGroup 内的 formControl.

所以基本上每一行都是一个表单，可以单独提交(每行还有一个提交"按钮).

我怎样才能做到这一点?你能给我提供一个我可以使用的样板吗?

这是我到目前为止尝试过的:https://angular-dpwgzp.stackblitz.io我得到错误:formControlName 必须与父 formGroup 指令一起使用."另外，我不知道在每一行中放置标签的位置.

解决方案

如果我们无法访问代码，很难获得帮助.

在这个stackblitz中，我把一个简单的例子.看到我们创建了一个像

这样的表单数组

myformArray = new FormArray([新表单组({名称:new FormControl("uno"),姓氏:new FormControl("one")}),新表单组({名称:new FormControl("dos"),姓氏:new FormControl("二")}),新表单组({名称:new FormControl("tres"),姓氏:new FormControl("三")})])

表格的dataSource为formArray控件.

 dataSource = this.myformArray.controls;

这样，元素"就是一个FormGroup，所以一个单元格可以像

 <th mat-h​​eader-cell *matHeaderCellDef>名称</th><td mat-cell *matCellDef="let element"><input [formControl]="element.get('name')"></td></ng-容器>

看到我们使用 [formControl].那是.一个 mat-table 迭代 myformArray.controls，它只是一个 FormGroups 的数组.FormGroup 就是这个元素"，所以 element.get('...') 是一个 FormControl.这就是我们可以使用 [formControl]=element.get('...')

的原因

就像我们写的不是 mat-table

<input [formControl]="element.get('name')"><input [formControl]="element.get('surname')">

I have an array of formGroup, where each element represents a form. Next I have a mat table, where what I want to do is to generate each tr (so each row) as a distinct form, so that the i-th row of the table is linked to the i-th formGroup. So inside the i-th row, each td element contains an input, and this input should be linked to a formControl which is inside the i-th formGroup.

So basically each row is a form, which can be submitted individually (each row also has a "Submit" button).

How can I accomplish this? Can you provide me a boiler plate I can work on?

Edit: here's what I tried so far: https://angular-dpwgzp.stackblitz.io where I get "Error: formControlName must be used with a parent formGroup directive." Also, I have no Idea about where to put the tag in each row.

解决方案

It's difficult help if we can't get access to the code.

In this stackblitz I put a simple example. See that we create a form Array like

myformArray = new FormArray([
    new FormGroup({
      name: new FormControl("uno"),
      surname: new FormControl("one")
    }),
    new FormGroup({
      name: new FormControl("dos"),
      surname: new FormControl("two")
    }),
    new FormGroup({
      name: new FormControl("tres"),
      surname: new FormControl("three")

    })])

The dataSource of the table is the formArray controls.

  dataSource = this.myformArray.controls;

In this way, "element" is a FormGroup, so a cell can be like

  <ng-container matColumnDef="name">
    <th mat-header-cell *matHeaderCellDef> Name </th>
    <td mat-cell *matCellDef="let element">
       <input [formControl]="element.get('name')">
       </td>
  </ng-container>

See that we use [formControl]. That's. A mat-table iterate over myformArray.controls, that is only an array of FormGroups. The FormGroup is this "element", so element.get('...') is a FormControl. It's the reason we can use [formControl]=element.get('...')

it's like we write not mat-table

<div *ngFor="let element of myformArray.controls">
  <input [formControl]="element.get('name')">
  <input [formControl]="element.get('surname')">
</div>

这篇关于每行的 mat-table 中的 formGroup 数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！