DocumentContentChangedInterval and saving when DataContext changes...

[Francois Lamy]

I am using the DocumentContentChangedInterval event to prevent the document from saving on every keystroke.  But I am using Data Binding to take the document content and transfer it to a property on my view model.  When the view model changes (i.e. the DataContext is changed), I do not get a commit to the original view model if the DocumentContentChangedInterval has not yet elapsed.  Is there some way to FORCE it to save the content?

[Iva Toteva]

Hello Thomas Whittaker,

Instead of increasing the DocumentContentChangedInterval, you can use an UpdateSourceTrigger and set it to LostFocus or Explicit. In your case more appropriate will probably be the latter, allowing you to manipulate the update of the property of your view model. That is, if you have the following XAML:

<telerik:RadRichTextBox Name="richTextBox" />

<telerikHtml:HtmlDataProvider Name="html"
Html="{Binding MyProperty, UpdateSourceTrigger=Explicit, Mode=TwoWay}" RichTextBox="{Binding ElementName=richTextBox}" />

You can update the source whenever needed by invoking the following method:

private void UpdateRichTextBoxBindingSource()
{
    BindingExpression binding = html.GetBindingExpression(HtmlDataProvider.HtmlProperty);
    binding.UpdateSource();
}

I hope this helps.

Greetings,
Iva
the Telerik team