c# - MVVM Textbox binding, updating data from Model -


I'm struggling to move my application to MVVM. I'm trying to force several text boxes from some data through MVVM.

Model: 

  public class XMLItems {string input; Public string input {get {return input; } Set {input = value; }}}

View modell 

  public viewload () // translates iComed by methods {_ items = new XMLItems {input = ""}; } XMLItems _items; Public XML item items {get {return_items; } Set {_items = value; }} Public string input {get {return items.Input; } Set {if (Items.Input! = Value) {items.Input = value; OnPropertyChanged ("Input"); }}} Public Zero ChangeInput (object obj) {input = "123"; } Zero OnPropertyChanged (string propertyName) {PropertyChangedEventHandler handler = this.PropertyChanged; If (handler! = Null) handler (this, new property changed event event (property name)); } Private Event PropertyChangedEventHandler PropertyChanged;

So all that works when the ChangeInput function is removed, text update 123 .

But what I have to do, update my text with my text, where all the code is logic, and it happens in many places from my app (updating text) but to do this work For example, if I fire: 

  public zero ChangeText () {input = "456"; }

... in my model, does not update this text?

Am I unable to find other such examples? Am I doing this wrong?

@ user469104 This is most accurate.

If you want to make internal to an object , then you implement that object to INotifyPropertyChanged and Need to increase propertyChanged

However , if this object is being used directly by Visual / View model (yours is), it will work automatically XmlItems is effectively a DTO, I have it properly as I have described. You do not need different viewless / model business objects.


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