如果在角度6中使用formGroup，则会显示一些错误

Question

通过在反应形式中使用

<form #branchForm [formGroup]='branchForm'>

作为，我有一些错误

Error: Uncaught (in promise): Error: Template parse errors:
Can't bind to 'formGroup' since it isn't a known property of 'form'. ("
<div class="box">
<div class="box-body">
<form #branchForm [ERROR ->][formGroup]='branchForm'>
<div class="row">
<div class="form-group"  [ngClass]="): ng:///BranchManagementRoutingModule/BranchManagementComponent.html@63:26
Error: Template parse errors:
Can't bind to 'formGroup' since it isn't a known property of 'form'. ("
<div class="box">
<div class="box-body">
<form #branchForm [ERROR ->][formGroup]='branchForm'>
<div class="row">
<div class="form-group"  [ngClass]="): ng:///BranchManagementRoutingModule/BranchManagementComponent.html@63:26
at syntaxError (compiler.js:1021)
at TemplateParser.push../node_modules/@angular/compiler/fesm5/compiler.js.TemplateParser.parse (compiler.js:14830)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._parseTemplate (compiler.js:24018)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileTemplate (compiler.js:24005)
at compiler.js:23948
at Set.forEach (<anonymous>)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileComponents (compiler.js:23948)
at compiler.js:23858
at Object.then (compiler.js:1012)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileModuleAndComponents (compiler.js:23857)
at syntaxError (compiler.js:1021)
at TemplateParser.push../node_modules/@angular/compiler/fesm5/compiler.js.TemplateParser.parse (compiler.js:14830)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._parseTemplate (compiler.js:24018)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileTemplate (compiler.js:24005)
at compiler.js:23948
at Set.forEach (<anonymous>)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileComponents (compiler.js:23948)
at compiler.js:23858
at Object.then (compiler.js:1012)
at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileModuleAndComponents (compiler.js:23857)
at resolvePromise (zone.js:814)
at resolvePromise (zone.js:771)
at zone.js:873
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)
at Object.onInvokeTask (core.js:3811)
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)
at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)
at drainMicroTaskQueue (zone.js:595)

我已经导入了所有必要的模块，如ReactiveFormsModule、Fromgroup等

从"@angular/forms"导入{FormsModule，ReactiveFormsModule}；并将其包括在进口中

Answer 1

import ReactiveFormsModule from @angular/forms 

需要导入到组件模块中，并添加到导入中。

import { ReactiveFormsModule } from '@angular/forms';
@NgModule({
imports: [
// other imports ...
ReactiveFormsModule
],
})
export class AppModule { }

Answer 2

要修复此错误，只需要在模块中import ReactiveFormsModule from @angular/forms即可。