Used for grouping in the long list selector If your data is changing then you should implement the INotifyPropert圜hanged interface. This can be any value, but here it’s the first letter of the Name value in lower case. We’ll start with the simple Contact class that has two 3 properties.
This includes showing group titles that contain no child records too! Let say you have a list of contacts that you would like to display with the typical A-Z short cuts as shown here. I am sure it can be done with a single LINQ statement. To help me understand what was need I broke it down into some simple stages. This also ensure that things are kept up-to-date in the UI without additional coding. The answer that I found easiest to understand and follow was to use ‘nested Observable collections’. Especially if you want to use ‘pure’ binding to an ObservableCollection. The LongListSelector is great for long lists in Windows Phone 7, but getting your data into the right format can be tricky and confusing (certainly took me a while to work out what to do!). So, for a TextBox called txtBox1 the syntax would be: ForceControlRebind(txtBox1, TextBox.TextProperty) To rebind a control just pass the Control and the DependencyProperty whose binding you wish to refresh. Public static void ForceControlRebind(Control cntrl, DependencyProperty depprop)īindingExpression BindExp = cntrl.GetBindingExpression(depprop) / The dependency property of the control / The control to which the dependency property exists / Can be used after updating a controls Culture / Rebinds a controls dependency property to it's original binding. To help I have created a simple generic method to help. Anyone who has tried this will realise that the controls will not reflect the change until an underlying value has updated.Īlternatively you can rebind the control. Such as when displaying dates and currencies in a particular culture. I often need to change the Language (or culture) of a control (changing the Control.Language) or the whole thread (changing CurrentThread.CurrentUICulture).
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