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POwpf c# databinding on object
 

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  1. POwpf c# databinding on object
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    <p>say I have this control:</p> <pre><code>public partial class bloc999 : UserControl { bloc999Data mainBlock = new bloc999Data(); public bloc999() { InitializeComponent(); mainBlock.txtContents = "100"; base.DataContext = mainBlock; } } </code></pre> <p>in the xaml:</p> <pre><code> &lt;TextBox Margin="74,116,106,0" Name="txtContents" Text="{Binding Path=txtContents, UpdateSourceTrigger=PropertyChanged,Mode = TwoWay}" /&gt; &lt;TextBox Margin="74,145,106,132" Name="txtContents2" Text="{Binding Path=txtContents2, UpdateSourceTrigger=PropertyChanged,Mode = TwoWay}" /&gt; </code></pre> <p>Then I have this class:</p> <pre><code>public class bloc999Data : INotifyPropertyChanged { string _txtContents; string _txtContents2; public event PropertyChangedEventHandler PropertyChanged; void NotifyPropertyChanged(string propName) { if (this.PropertyChanged != null) this.PropertyChanged( this, new PropertyChangedEventArgs(propName)); } public string txtContents2 { get { return this._txtContents2; } set { if (int.Parse(value) &gt; int.Parse(this._txtContents)) { this._txtContents2 = "000"; } else this._txtContents2 = value; NotifyPropertyChanged("txtContents2"); } } public string txtContents { get { return this._txtContents; } set { this._txtContents = value; NotifyPropertyChanged("txtContents"); } } } </code></pre> <p>Ok now say I have A button on the form and I do this in the code:</p> <pre><code>mainBlock.txtContents2 = "7777777"; </code></pre> <p>It puts 000 in the textbox, but If i just type in manually, in the textbox (txtContents2), the setter code is called but for some reason the textboxes value does not change, the instance value does change. help?</p>
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