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Vue two-way data binding issue


By : Mario Carlos Roca Pe
Date : August 02 2020, 07:00 AM
To fix the issue you can do My own vue component sends http request to receive array of objects, then I store the answer in data property, and it's fine. Now I want to bind this array to v-model, but when user will input something my array is changed too. I want to store the array for later and make it not editable, I just want to bind its value to v-model, not reference to my array. My target is to allow user to reset v-model value to array received from api. I hope you get the point and you will be able to help me. , Data must be cloned:
code :
new Vue({
  template: '<div>List1:<ul><li v-for="i in array1" :key="i.id">{{i.name}}</li></ul>List2:<ul><li v-for="i in array2" :key="i.id">{{i.name}}</li></ul><button @click="add">Add</button></div>',
  data: {
    array1: [{id:1, name:'Item1'},{id:2, name:'Item2'}],
    array2: []
  },
  created() {
    // clone array
    this.array2 = this.array1.map(i => Object.assign({},i))
  },
  methods: {
    add() {
      this.array1.push({id:this.array1.length+1, name:'Item'+(this.array1.length+1)})
      this.array1[0].name = 'Item1/' + this.array1.length
    }
  }
}).$mount('div')
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div></div>


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Data Binding or DataContext issue when binding a ListView from multiple sources


By : Mehran
Date : March 29 2020, 07:55 AM
seems to work fine I cant quite figure out how to bind my list view to both properties in my ViewModel and a list in my view model. , there are two possible ways:
1) name the ListView
code :
<ListView x:Name="MyListView" ItemsSource="{Binding Path=SomeListInViewModel}">
IsEnabled="{Binding ElementName=MyListView, Path=Whatever}" 
IsEnabled="{Binding Path=Whatever, RelativeSource={RelativeSource AncestorType={x:Type ListView}}}" 

Data-binding issue binding a table with add / remove


By : Armin Seimel
Date : March 29 2020, 07:55 AM
wish of those help I might have understood your question incorrectly, have a look at the below and let me know if you have any questions
code :
function EstimateMaterialLine() {
    var self = this;
    self.EstMatlID = ko.observable();
    //other observables to follow
}
var job = @Html.Raw(Json.Encode(Model.job));
var customer = @Html.Raw(Json.Encode(Model.customer));
var listTasks = @Html.Raw(Json.Encode(Model.Tasks));
var estimateMaterials = @Html.Raw(Json.Encode(Model.estimateMaterials));
var estimate = @Html.Raw(Json.Encode(Model.estimate));

var JobPostViewModel = function(){
    var self = this;
    self.customer = ko.observable(customer);
    self.job = ko.observable(job);
    self.listTasks = ko.observableArray(listTasks);
    self.estimateMaterials = ko.observableArray(estimateMaterials);
    self.estimate = ko.observable(estimate);
    self.removeEstimateMaterial = function(line) { 
        self.estimateMaterials.remove(line) 
    };
    self.addEstimateMaterial = function() { 
        self.estimateMaterials.push(new EstimateMaterialLine()) 
    };
};
var model = new JobPostViewModel();
ko.applyBindings(model,  document.getElementById("update-job-form"));
<table data-bind="foreach: estimateMaterials">
    <tr>
       <td> <input type="button" value="delete" data-bind="click: $root.removeEstimateMaterials"/> </td>
    <tr>
</table>
<input type="button" value="Add" data-bind="click: $root.addEstimateMaterials"/>

Android Data binding issue Binding adapter call twice


By : Andrew Rawson
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , As Ravi says in the comments, it is working as intended. After you create the initial binding, the values should be set to the values as they are. If you haven't set anything then they will be set to null.
You can change the behavior by explicitly telling the binding to not bind. Add an OnRebindCallback to the binding:
code :
private OnRebindCallback<ActivityMainBinding> delayRebindCallback = 
        new OnRebindCallback<ActivityMainBinding>() {
    @Override
    public boolean onPreBind(ActivityMainBinding binding) {
        return false;
    }
};

// ... and then after creating the binding ...
binding.addOnRebindCallback(delayRebindCallback);
binding.removeOnRebindCallback(delayRebindCallback);
binding.setUserinfo(img);
binding.executePendingBindings();

Vue.js 2.0 data binding issue - one data field's change will trigger the other data fields' filter


By : Raymond Johnson
Date : March 29 2020, 07:55 AM
it helps some times This is natural to Vue.
Methods & Filters run on every DOM re-render.

Data Binding Issue: How do I get the Binding value to work both ways?


By : k1n1
Date : March 29 2020, 07:55 AM
To fix the issue you can do I am working on a MVVM WPF application and I have a CheckBox which I am trying to work on. What I want is for the value to be binding to a model property (which I have done). However, when I click it in a debugging session it never actually changes my IsChecked property to true from its default false. Please see code below: , Bind to the model's property:
code :
<CheckBox IsChecked="{Binding Model.IsChecked}" ...>
private MyModel _myModel = new MyModel();
public MyModel Model { get { return _myModel; }}
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