mat-form-field必须包含MatFormFieldControl

我们正试图在我们公司建立我们自己的形式场组件。我们试图这样包装材料设计的组件:

字段:

<mat-form-field>
    <ng-content></ng-content>
    <mat-hint align="start"><strong>{{hint}}</strong> </mat-hint>
    <mat-hint align="end">{{message.value.length}} / 256</mat-hint>
    <mat-error>This field is required</mat-error>
</mat-form-field>

文本框:

<field hint="hint">
    <input matInput 
    [placeholder]="placeholder" 
    [value]="value"
    (change)="onChange($event)" 
    (keydown)="onKeydown($event)" 
    (keyup)="onKeyup($event)" 
    (keypress)="onKeypress($event)">
</field>

用法:

<textbox value="test" hint="my hint"></textbox>

结果大致如下:

<textbox  placeholder="Personnummer/samordningsnummer" value="" ng-reflect-placeholder="Personnummer/samordningsnummer">
  <field>
    <mat-form-field class="mat-input-container mat-form-field">
      <div class="mat-input-wrapper mat-form-field-wrapper">
        <div class="mat-input-flex mat-form-field-flex">
          <div class="mat-input-infix mat-form-field-infix">
            <input _ngcontent-c4="" class="mat-input-element mat-form-field-autofill-control" matinput="" ng-reflect-placeholder="Personnummer/samordningsnummer" ng-reflect-value="" id="mat-input-2" placeholder="Personnummer/samordningsnummer" aria-invalid="false">
            <span class="mat-input-placeholder-wrapper mat-form-field-placeholder-wrapper"></span>
          </div>
        </div>
        <div class="mat-input-underline mat-form-field-underline">
          <span class="mat-input-ripple mat-form-field-ripple"></span>
        </div>
        <div class="mat-input-subscript-wrapper mat-form-field-subscript-wrapper"></div>
      </div>
    </mat-form-field>
  </field>
</textbox>

但是我在控制台得到“mat-form-field必须包含MatFormFieldControl”。我猜这与mat-form-field不直接包含matinput字段有关。但它包含了它，只是在ng-content投影中。

以下是闪电战: https://stackblitz.com/edit/angular-xpvwzf

当前回答

9加1。9 +材料

我注意到有3个错误会导致同样的错误:

确保你已经在app.module或模块中导入了MatFormFieldModule和MatInputModule。导入组件的t(嵌套模块的情况下) 当你包装材料按钮或复选框在垫形式领域。请参阅可以用mat-form-field封装的材料组件列表当你没有在标签中包含matInput时。例如:<input matInput type="number" step="0.01" formControlName="price" />

2020-06-27 08:01:23

其他回答

import {MatInputModule} from '@angular/material/input';



@NgModule({
    imports: [
        MatInputModule
    ],
    exports: [
        MatInputModule
    ]
})

2020-01-15 08:14:39

你可以在你的mat-form-field标签中设置appearance="fill"，这对我来说很有用

<form class="example-form">
  <mat-form-field class="example-full-width" appearance="fill">
    <mat-label>Username Or Email</mat-label>
    <input matInput placeholder="Username Or Email" type="text">
  </mat-form-field>

  <mat-form-field class="example-full-width" appearance="fill">
    <mat-label>Password</mat-label>
    <input matInput placeholder="Password" type="password">
  </mat-form-field>
</form>

2020-06-04 11:36:33

import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';

不要忘记在前面添加< table> </table>

 <mat-form-field>
        <mat-label>Filter</mat-label>
        <input matInput (keyup)="applyFilter($event)" placeholder="Ex. Helium" #input>
      </mat-form-field>

不要忘记在最后添加< table> </table>

<tr class="mat-row" *matNoDataRow>
<td class="mat-cell" colspan="4">
   No data matching the filter "{{input.value}}"
</td>
</tr>

2021-02-11 11:54:08

这意味着你没有导入MatInputModule

import { MatInputModule } from '@angular/material/input';
import { MatFormFieldModule } from "@angular/material/form-field";

@NgModule({
    imports: [
        MatFormFieldModule,
        MatInputModule
    ]
})
export class AppModule { }

2021-08-03 17:56:48

当错误地将输入放置在mat-form-field之外时，也会出现此错误。要修复它，就像下面这样把它带进去:

糟糕的代码:

<mat-form-field class="full-width">
</mat-form-field>
<input matInput placeholder="Title" formControlName="title" #title />

Fix:

<mat-form-field class="full-width">
    <input matInput placeholder="Title" formControlName="title" #title />
</mat-form-field>

2020-10-26 10:08:46

mat-form-field必须包含MatFormFieldControl

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