two-way-binding

问题 This is not a question on how to do Angular bindings. It's not about ngModel etc. It's about a feature that I've just been educated on, seemingly working and quite nicely. I've never heard of it and I can't confirm it in any documentation I've looked into. I asked a question and got a few answers, one of which was spot-on and easy to implement. Basically, it's about the two-way binding that works automagically without implementing ControlValueAccessor nor manually mapping values to the model

问题 This is not a question on how to do Angular bindings. It's not about ngModel etc. It's about a feature that I've just been educated on, seemingly working and quite nicely. I've never heard of it and I can't confirm it in any documentation I've looked into. I asked a question and got a few answers, one of which was spot-on and easy to implement. Basically, it's about the two-way binding that works automagically without implementing ControlValueAccessor nor manually mapping values to the model

问题 I have a view component that fetches the data model from a service and sets it as a property on itself. Then, a set of custom components recieve the fields of the property as input to display within them. This works as expected. <app-textbox [caption]="'First name'" [value]="data.name.first"></app-textbox> ngOnInit() { this.service.getData() .subscribe(res => this.data = res); } When the custom component gets its contents edited, I noticed that the original model isn't updated. After some

问题 I want to achieve two-way binding on a array with Data Binding in Android. This is a simplified version of the code I have: <data> <variable name="values" type="Integer[]" /> </data> <EditText ... android:text="@={Converter.toString(values[0])} /> But when I try to build this code I get a message as follows: cannot find method setTo(java.lang.Integer[], int, java.lang.Integer) in class android.databinding.ViewDataBinding How can I achieve two-way binding with an array, if at all possible? 回答1

问题 I want to achieve two-way binding on a array with Data Binding in Android. This is a simplified version of the code I have: <data> <variable name="values" type="Integer[]" /> </data> <EditText ... android:text="@={Converter.toString(values[0])} /> But when I try to build this code I get a message as follows: cannot find method setTo(java.lang.Integer[], int, java.lang.Integer) in class android.databinding.ViewDataBinding How can I achieve two-way binding with an array, if at all possible? 回答1

问题 I am creating an Angular2 project and having a problem with two-way binding for a checkbox. I have a class called listItem and List like that: export class ListItem { public count: number; public value: string; public checked: boolean; constructor(count: number, value: string, checked: boolean) { this.count = count; this.value = value; this.checked = checked; } } export class MyList{ public category: string; public listItem : ListItem []; constructor(category: string, listItem : ListItem [])

问题 Playing with MultiBinding : What I want: clicking either checkbox should toggle all others. Problem: clicking A doesn't change B , clicking B doesn't change A . Result works. Question: how would I fix it, while still using MultiBinding ? P.S.: this is an attempt to solve more complicated problem, please refer to it before offering to bind all checkboxes to a single property. Below is a mcve. xaml: <StackPanel> <CheckBox Content="A" IsChecked="{Binding A}" /> <CheckBox Content="B" IsChecked="

问题 It seems there is no way to watch changes in the parent component when using two-way data binding. I have a custom input component for collecting a tag list. Two-way data binding is setup and working between this component and its parent. // the parent component is just a form // here is how I'm adding the child component <input-tags formControlName="skillField" [(tags)]='skillTags' (ngModelChange)="skillTagUpdate($event)"></input-tags> In the parent component how do you watch the bound

问题 I googled for an answer to this for more than two weeks now. This usually means either I am blind or the idea is absurd. Anyways: In a middle-sized, quite flexible project I'm storing configuration data in a hierarchical structure in the like of this one: Configuration (collection) Audio (class) BaseDir (struct) PlayMode (enum) Input (class) CalibrateOnConnect (bool) KnownDevices (collection) ... (class) ... UseDevice (integer) Playlist (collection) FirstAudio (class) Path (string) Repeat

问题 We have an app that uses simple one way binding with a GridView to display some data. Well, now we need to allow the user to change some of that data, so I've been trying to get two way data binding to work in the GridView. So far everything displays correctly, but editing cells in the GridView seems to do nothing at all. What am I messing up? Is two way databinding like this even possible? Should I just start converting everything to use a different control, like maybe a DataGrid? I wrote a