Text box decision making, C# - Windows Phone

Question

How to apply "if conditions" on textBoxs?

Like I want to develop "GPA Calculator" application. When application starts, I want to ask a user Number of Subjects, so that only that number of textBoxes & Labels will appear that user wants.

Does "decision making" used in XAML Coding?

http://stackoverflow.com/questions/10463759/wp7-conditionally-show-hide-control-elements-in-data-templates — jeroenh, Jun 20 '13 at 07:40

score 1 · Answer 1 · answered Jun 20 '13 at 07:42

1

Take the input of the textbox and use it to choose the number of textboxes and labels to appear. I dont think you need to use 'if'

answered Jun 20 '13 at 07:42

Loko

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@Khateeb Using the input of the textbox to tell how many labels and textboxes you want – Loko Jun 20 '13 at 10:01

score 0 · Accepted Answer · edited Jun 20 '20 at 09:12

You most probably want to use a ListBox with its elements (your text boxes and labels in needed amount) are tied to the view model via data-binding. I hope you're familiar with data binding in XAML & C#, but if not, check this out.

So, I'd create a ListBox with the ItemsSource property data-bound to an instance of ObservableCollection, containing view models for your list view.

<ListBox ItemsSource="{Binding GPAItems}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding GPAItemLabel}" />
                <TextBox Text="{Binding GPAItemText, Mode=TwoWay}" />
            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

where GPAItems is ObservableCollection<GPAItem>, and GPAItem is:

class GPAItem: INotifyPropertyChanged
{
    ...
    public string GPAItemLabel {get; set;}
    public string GPAItemText {get; set;}
}

The code above is not tested (I've just written it in browser for you), but you should get the idea from here. Again, knowledge of data-binding and MVVM architecture is highly beneficial for any Windows Phone developer, so check it out, and most questions will go away.

Thanks, I will try then tell you more what I discover – Khateeb321 Jun 20 '13 at 09:28 — Khateeb321, Jun 20 '13 at 09:28

Text box decision making, C# - Windows Phone

2 Answers2