不能绑定“NG模型”也不能呈现垫子-在角形材质中选择角形6

Question

我在应用程序中使用Angular Material，并且Mat-select基于循环多次显示，并且一些条件我需要在ngAfterViewInit（）中的Mat-select中默认选择数据

循环，它处理多个mat-select

*ngFor="let p of GlobalVariableService.controllsApplicationTypeFields;let filedIndex = index "

我正在创建多个mat-select代码

<div class="mt-3 example-full-width"
                                *ngIf="(p.FK_FieldType == '6') && p.FK_PanelId == k.PanelId">
                                <div *ngFor="let list of  GlobalVariableService.listSelectData">
                                    <mat-form-field *ngIf="list.id == p.FieldId" class="w-95">
                                        <mat-select matNativeControl name="ApplicationStatusId"
                                            [(ngModel)]="GlobalVariableService.controllsApplicationTypeFields[filedIndex].DefaultValue"
                                            required>
                                            <mat-option *ngFor="let l of list.FieldListItems" [value]="l.ItemId">
                                                {{GlobalVariableService.isEn === true ? l.FieldText : l.FieldTextAr}}
                                            </mat-option>
                                        </mat-select>
                                    </mat-form-field>
                                </div>
                            </div>

TS代码为

 for (var ls = 0; ls < this.GlobalVariableService.controllsApplicationTypeFields.length; ls++) {
              if (Control == this.GlobalVariableService.controllsApplicationTypeFields[ls].FieldId) {
                 this.GlobalVariableService.controllsApplicationTypeFields[ls].DefaultValue = this.GlobalVariableService.ApplicationValues[i].Value;
                debugger;
                console.log("selected value is");
                console.log(this.GlobalVariableService.controllsApplicationTypeFields[ls].DefaultValue);
              }
            }

如果我在itemid中显示值，则itemid在ngModel中是正确的，但未呈现Mat-select请帮助

Answer 1

可能是角度错误：“不能绑定到'ng模型'，因为它不是'input'的已知属性”？

import { FormsModule } from '@angular/forms';

@NgModule({
    imports: [
         FormsModule      
    ]