Looping over XAML Tags

Question

I have a WPF application with many shortcuts.

<Label x:Name="label1" /> <Label x:Name="label2" /> <Label x:Name="label3" /> .... 

I do not want each label to mean one by one, for example:

 label1.content= 1; label2.content= 20; label3.content= 30; .... 

I want to do it more like this:

 for(int i = 1; i<40 ;i++) { label"i".content = i*10; } 

Is there any way to do this?

Answer 1

If your tags are named sequentially, you can do this as follows:

 var numberOfLabels = 40; for(int i = 1; i <= numberOfLabels; i++) { var labelName = string.Format("label{0}", i); var label = (Label) this.FindName(labelName); label.Content = i * 10; } 

Answer 2

If you work with snapping, this is easy. You just need to save the contents of your label in the ObservableCollection<string> on the ViewModel. And then you can do whatever you want with them, in your iteration case.

Change 1:

Also your xaml should look something like this:

  <ItemsControl ItemsSource="{Binding MyLabelValues}"> <ItemsControl.ItemTemplate> <DataTemplate> <sdk:Label Content="{Binding Mode=TwoWay}"></sdk:Label> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> 

Answer 3

Using this code

 public static IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject { if (depObj != null) { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++) { DependencyObject child = VisualTreeHelper.GetChild(depObj, i); if (child != null && child is T) { yield return (T)child; } foreach (T childOfChild in FindVisualChildren<T>(child)) { yield return childOfChild; } } } } 

You can list all controls by type.

 foreach (Label lbl in FindVisualChildren<Label>(window)) { // do something with lbl here } 

Answer 4

You can add all those Label to the List<Label> in the form constructor.

This is a tedious job, but you only need to do it once.

 List<Label> labels = new List<Label>(); labels.Add(label1); // etc. // loop for (int i = 0; i < labels.Count; i++) labels[i].Text = i.ToString(); // alternative loop foreach (Label label in labels) label.Text = "test"; 

Answer 5

How about this?

 List<Label> labelL = new List<Label>(); for(int i = 1; i<40 ;i++) labelL.Add(new Label{ Name = "label"+i, Content = i*10 }); 

The end result will be like this.

 label1.Text = 10; label2.Text = 20; label3.Text = 20; ... ...