I am building a WPF application using C#. I want to pop out a dialog box to prompt the user to enter his/her name. After that, I will keep track of the name and save some data into a .txt
file using the name.
For example:
Name input is
name = "John"
And so I have data
data="1, 2, 3";
and then I save the "data" in John.txt
file.
Does anyone know how to do it?
I think the problem is how to pop out a dialog for the user to enter name.
WPF, stands for Windows Presentation Foundation is a development framework and a sub-system of . NET Framework. WPF is used to build Windows client applications that run on Windows operating system. WPF uses XAML as its frontend language and C# as its backend languages.
Windows Presentation Foundation (WPF) is a UI framework that creates desktop client applications. The WPF development platform supports a broad set of application development features, including an application model, resources, controls, graphics, layout, data binding, documents, and security.
This demonstrates that Microsoft still has faith in WPF as a user interface framework, and the company is still willing to invest in it by updating and integrating it with its new offerings.” “Microsoft released WPF, WinForms, and WinUI on the same day it released.NET Core 3.0 Preview 1.
WPF is a . NET technology. Of course it can be used with C++, like any other part of . NET can, but it requires you to jump through some interop hoops, or possibly write it all in C++/CLI. (And you'll have to write a lot of boilerplate code yourself, as the designer doesn't work with C++/CLI.)
I prefer to take an approach using dialogs that doesn't lock up the application, and moves away from the more traditional Win32 Dialog.
Example
Input Dialog Hidden
In this example I use a simplified version of the MVVM based solution I am using for my applications. It may not be pretty, but should give you a solid idea on the basics behind it.
The XAML:
<Window x:Class="WpfApplication1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Grid> <StackPanel> <Button Content="Cool Button" x:Name="CoolButton" Click="CoolButton_Click"/> <ListBox x:Name="MyListBox"/> </StackPanel> <!-- It's important that this is in the end of the XAML as it needs to be on top of everything else! --> <Grid x:Name="InputBox" Visibility="Collapsed"> <Grid Background="Black" Opacity="0.5"/> <Border MinWidth="250" Background="Orange" BorderBrush="Black" BorderThickness="1" CornerRadius="0,55,0,55" HorizontalAlignment="Center" VerticalAlignment="Center"> <StackPanel> <TextBlock Margin="5" Text="Input Box:" FontWeight="Bold" FontFamily="Cambria" /> <TextBox MinWidth="150" HorizontalAlignment="Center" VerticalAlignment="Center" x:Name="InputTextBox"/> <StackPanel Orientation="Horizontal" HorizontalAlignment="Center"> <Button x:Name="YesButton" Margin="5" Content="Yes" Background="{x:Null}" Click="YesButton_Click"/> <Button x:Name="NoButton" Margin="5" Content="No" Background="{x:Null}" Click="NoButton_Click" /> </StackPanel> </StackPanel> </Border> </Grid> </Grid> </Window>
It's very easy to show this dialog as you only need to set the Visibility of the InputBox
grid to visible. You then simply handle the Yes / No buttons and get the Input text from the TextBox.
So instead of using code that requires ShowDialog()
, you simply set the Visibility
option to Visible
. There are still some things to do in this example that we will handle in code-behind, like for example clearing the InputText box after handling the Yes/No Button clicks.
The code-behind:
namespace WpfApplication1 { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private void CoolButton_Click(object sender, RoutedEventArgs e) { // CoolButton Clicked! Let's show our InputBox. InputBox.Visibility = System.Windows.Visibility.Visible; } private void YesButton_Click(object sender, RoutedEventArgs e) { // YesButton Clicked! Let's hide our InputBox and handle the input text. InputBox.Visibility = System.Windows.Visibility.Collapsed; // Do something with the Input String input = InputTextBox.Text; MyListBox.Items.Add(input); // Add Input to our ListBox. // Clear InputBox. InputTextBox.Text = String.Empty; } private void NoButton_Click(object sender, RoutedEventArgs e) { // NoButton Clicked! Let's hide our InputBox. InputBox.Visibility = System.Windows.Visibility.Collapsed; // Clear InputBox. InputTextBox.Text = String.Empty; } } }
The code-behind could easily be done using a Dependency, or as ViewModel logic in this case, but for simplicity I kept it in the code-behind.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With