I keep climbing the steep WPF hill! So I want to create a UI that allows the user to dynamically add a text box. To do this they would hit a button.
I've managed to create this using code behind but I want to move towards an MVVM structure so I don't have any code in the view. I've tried ICommand and ObservableCollection but I'm missing something and I don't know where. Here is my simple example.
XAML: Very basic with one button that adds a row.
<Window x:Class="WPFpractice072514.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WPFpractice072514"
Title="MainWindow" Height="350" Width="525">
<Grid Name="mymy" >
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Button Grid.Column="0" Grid.Row="0" Name="ButtonUpdateArtist"
Content="Add TextBox" Click="ButtonAddTexboxBlockExecute" />
</Grid>
</Window>
C# Code Behind
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WPFpractice072514
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
#region members
int count = 0;
#endregion
public MainWindow()
{
InitializeComponent();
}
private void ButtonAddTexboxBlockExecute(Object Sender, RoutedEventArgs e)
{
TextBox t = new TextBox();
t.Height = 20;
t.Width = 20;
t.Name = "button";
RowDefinition rowDef1;
rowDef1 = new RowDefinition();
mymy.RowDefinitions.Add(rowDef1);
ColumnDefinition colDef1;
colDef1 = new ColumnDefinition();
mymy.ColumnDefinitions.Add(colDef1);
++count;
mymy.Children.Add(t);
Grid.SetColumn(t, 1);
Grid.SetRow(t, count);
}
}
}
Questions: What code (XAML and C#) do I need to be able to move the method out of the code behind and into a viewmodel?
Can you use commands to dynamically add a textbox?
I'm assuming that the textboxes must be kept in a container which in this case is what grid is for. But if I'm using an MVVM do I need to contain the textboxes in a listview or some other container that uses ItemsSource?
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