【angularjs2】双向绑定

public UserEntity:any={};

public showUserEntityCommon(index:any):void{
        this.UserEntity= this.List[index];             

        
    }

<div class="row">
                            <div class="col-md-2">账号:</div>
                            <div class="col-md-4">
                                <input type="text" class="form-control" maxlength="25" name="username" id="username" [(ngModel)]="UserEntity.username" #username="ngModel" disabled  placeholder="账号">
                            </div> 
                        </div>