Question

我在Angular中使用了材质对话框，我需要在其中输入标题并选择批准或拒绝变体。

此处的组件代码

  import {Component, Inject, OnInit} from '@angular/core';
import {MAT_DIALOG_DATA, MatDialogRef} from "@angular/material";
import {FormBuilder, Validators, FormGroup} from "@angular/forms";
import { Payment } from '../payments/payment';


@Component({
    selector: 'editing-dialog',
    templateUrl: './editing-dialog.component.html',
    styleUrls: ['./editing-dialog.component.scss']
})
export class EditingDialogComponent implements OnInit {
    form: FormGroup;
    reason:String;
    id: Number;
    statusdescription: String;

    constructor(
        fb: FormBuilder,
        private dialogRef: MatDialogRef<EditingDialogComponent>,
        @Inject(MAT_DIALOG_DATA) data:Payment) {
            this.reason = data.Reason;
            this.id  = data.Id;
            this.statusdescription = data.StatusDescription;
            this.form = fb.group({
                reason: [this.reason, Validators.maxLength(5)],
                id: this.id,
                status: status
            });
    }

    ngOnInit() {

    }
    save() {
        this.dialogRef.close(this.form.value);
    }

    close() {
        this.dialogRef.close();
    }
}

这是此组件的html

<h2>{{description}}</h2>

<mat-dialog-content [formGroup]="form">

    <mat-form-field>

        <input matInput required placeholder="Payment Reason" formControlName="reason" value="{{reason}}">


    </mat-form-field>
    <mat-radio-group formControlName="status">
        <mat-radio-button  value="Approved">Approved</mat-radio-button>
        <mat-radio-button value="Rejected">Rejected</mat-radio-button>
      </mat-radio-group>
</mat-dialog-content>

<mat-dialog-actions>

    <button class="mat-raised-button" (click)="save()">
        Ok
    </button>



    <button class="mat-raised-button"
            (click)="close()">
        Close
    </button>

</mat-dialog-actions>

如果我填写了输入内容，并且单击ok按钮时选择了单选按钮之一，则需要进行验证。现在，我需要输入验证。

我该如何正确地做到这一点？

感谢帮助。

Answer 1

创建表单组时，将所需的规则添加到想要的字段中，例如，此处的原因和状态字段是必填项：

this.form = fb.group({
                    reason: [this.reason, [Validators.required, Validators.maxLength(5)]],
                    id: this.id,
                    status: [status, [Validators.required]]
                });

然后使用保存方法：

save() {
    const {value, valid} = this.form;
    if(valid){
        this.dialogRef.close(value);
    }      
}

您可能需要添加mat-error元素以在html中显示验证错误

Answer 2

正在构建表单时

this.form = fb.group({
                reason: [this.reason, [Validators.required, Validators.maxLength(5)]],
                id: this.id,
                status: status
            });

保存时

    save() {
        if(this.form.valid) {
            this.dialogRef.close(this.form.value);
        }      
    }

Answer 3

首先确认我是否正确理解了您的问题。您必须单击“确定”按钮并获得表单的验证。如果这是问题，那么这里是解决方案：在.ts中定义表单组：

this.form = fb.group({
                reason: [this.reason,  Validators.compose([Validators.required, Validators.maxLength(5)])],
                id: this.id,
                status: status
            });

请定义状态的默认值，因为在上面的代码片段中看不到状态的定义。

现在点击确定按钮调用功能

clickOK(): void {
if (this.form.valid) {
    console.log('form is valid')
} else {
    console.log('form is invalid')
}
}

如果两个formcontrol验证都为true，则

this.form.valid将返回true。如果任何一个失败，则它将返回false。

在对话框Angular

3 个答案: