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how to delete a selected text box that was created at run time

I have a WPF application that has two buttons- Add and Remove. The add button adds text boxes in a specific grid in the gui at the run time programmatically and text box names will be assigned at runtime too. I want the delete button to delete the selected text box that was generated at the run time from the gui. I am not aware of a way to delete the text box unless I know the text box name and I am not sure which way to go regarding this. I would appreciate even a little guidance. I am very new to WPF and I am sure I should be missing some obvious.
Thanks in advance.

If you're using MVVM, (which you should be in WPF), you can do this:
In the ViewModel, expose a public ObservableCollection<T> that would contain the business objects (e.g. a User) that you need to show TextBoxes for.
In the UI, add an ItemsControl and bind it to your ObservableCollection.
Define a DataTemplate that translates the business objects into TextBoxes and binds TextBox properties to business objects members.
Implement Add and Remove RelayCommands in the ViewModel.
Bind your Add and Remove buttons with these commands.
This will save you from the hectic of walking the visual tree and finding appropriate textboxes etc.

Here is a basic demo to add and remove elements in/from Grid :
XAML:
<Window x:Class="TabControl.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TabControl"
Title="MainWindow" Height="300" Width="300"
xmlns:Interact="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
DataContext="{Binding RelativeSource={RelativeSource Mode=Self}}"
>
<ScrollViewer VerticalScrollBarVisibility="Visible">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal">
<Button Content="Add New Box" Click="Button_Click" />
<Button Content="Remove Selected Box" PreviewMouseLeftButtonDown="Button_PreviewMouseLeftButtonDown" />
</StackPanel>
<Grid x:Name="mygrid">
</Grid>
</StackPanel>
</ScrollViewer>
Events:
private void Button_Click(object sender, RoutedEventArgs e)
{
var textBox=new TextBox();
mygrid.RowDefinitions.Add(new RowDefinition());
textBox.Name = "textBox" + mygrid.RowDefinitions.Count;
textBox.SetValue(Grid.RowProperty, mygrid.RowDefinitions.Count);
mygrid.Children.Add(textBox);
}
private void Button_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var focusedElement = Keyboard.FocusedElement;
if (focusedElement is TextBox)
{
mygrid.Children.Remove(focusedElement as UIElement);
}
}
Output
Above is very basic WPF approach you can take, However i very much recommend you to look into MVVM pattern to easy to logic separation and flexibility (like #dotNEt suggested in his answer).

listbox focusing works totally wrong with shortcuts

When I tab into a ListBox control, the first item gets focused. When I have a label and set the target property to the ListBox (as shown in the code below) and then use the dedicated Alt shortcut then it will focus not the first item but the listbox itself (listbox border becomes dotted). What is the best way to avoid this unwanted behavior? Is there a way to disable focusing on the listbox itself and only allow focusing on the items?
Example code:
<Label Content="_Label" Margin="0,10,0,88" Name="MyLabel" Target="{Binding ElementName=MyListBox}" Height="Auto" />
<ListBox Width="100" Name="MyListBox" Margin="46,0,639,0" />
Behavior:

By setting Target you explicitly asked focus to move to listBox. In case you want to put it on first listBox item, you have to do it manually.
One way would be to hook GotFocus event and set focus to next available item using TravelRequest object which wil put it on first listBox item.
XAML:
<ListBox Width="100" Name="MyListBox" Margin="46,0,639,0"
GotFocus="MyListBox_GotFocus"/>
Code behind:
private void MyListBox_GotFocus(object sender, RoutedEventArgs e)
{
if (e.OriginalSource == sender)
{
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
MyListBox.MoveFocus(request);
}
}

Is this concept of a button containing a textbox possible?

Recently I had been looking for a way to make the tabs in a TabControl editable and came across This example on telerik's website. That did exactly what I wanted but it got me thinking about a similar usage for buttons. I was wondering if it would be possible to use something like that and make a button that would show a textbox instead of the content presenter when say, you right click the button? I tried to make something like this work but so far have only ended up with a blank button.
<Button x:Name="SB" Height="222" Width="222" Click="SB_Click">
<ContentControl.ContentTemplate>
<DataTemplate>
<local:SuperButton Content="{Binding Path=x, Mode=TwoWay}"/>
</DataTemplate>
</ContentControl.ContentTemplate>
</Button>
Where x is a string variable and using the code behind from the link above (with a class name change, of course).
edit: This button will be in an itemscontrol, so I don't think naming the inner elements in xaml will work, but I do like the ease of Wolfgang's answer.

The WPF Content Model is really flexible and allows literally anything inside anything.
This is perfectly valid XAML:
<Button>
<TextBox/>
</Button>
Or even:
<Button>
<MediaElement Source="C:\Videos\WildLife.wmv"/>
</Button>

You can simply host a (e.g.) label (TextBlock) with the text AND a TextBox inside the Button and set their Visiblity properties.
That way, if you right click the button, the TextBox shows up.
<Button>
<Grid>
<TextBox Text=normal button caption" x:Name="label" />
<TextBox
x:Name="textbox"
Text="visible on right click"
MouseRightButtonDown="HandleRightClick"/>
</Grid>
</Button>
And then in your C# code create an event handler to set the Visiblity correctly.
void HandleRightClick(object sender, MouseButtonEventArgs e)
{
label.Visibility = Visibility.Collapsed;
textBlock.Visibility = Visibility.Visible;
}

Working with elements inside a control that is bound to a collection

I have an ObservableCollection<string> that is bound to an ItemsControl whose template is just a Button. The content of this button are 2 TextBlock. I'm trying to use the PreviewMouseRightButtonUp event of the button to toggle the visibility of one of the textblocks, but without being able to use xaml names for elements in the template I'm hitting a wall. Is there a way of getting to the button's content elements via sender in that preview event, or some other way of doing this? This is related to a previous question I had that didn't quite get a usable answer (probably due to my explanation, hence this simplified example). It seems to me that what should happen is I should make a control based off button that adds a property for this toggle, but that is basically what I thought I had in the previous question that wasn't working. I feel like a property and trigger is what most would say is the right way to go?
xaml:
<ItemsControl x:Name="iC" >
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button PreviewMouseRightButtonUp="Button_PreviewMouseRightButtonUp">
<DockPanel>
<TextBlock Text="normal" DockPanel.Dock="Top"/>
<TextBlock Text="{Binding}" DockPanel.Dock="Top" Visibility="Collapsed"/>
</DockPanel>
</Button>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
code behind:
ObservableCollection<string> x = new ObservableCollection<string>();
public MainWindow()
{
x.Add("1");
x.Add("2");
InitializeComponent();
iC.ItemsSource = x;
}

If you name the hidden text block "secondTextBlock", then this should work:
private void Button_PreviewMouseRightButtonUp(object sender, MouseButtonEventArgs e)
{
DockPanel dockPanel = (DockPanel)((Button)sender).Content;
TextBlock text = (TextBlock)LogicalTreeHelper.FindLogicalNode(dockPanel, "secondTextBlock");
if (text != null)
{
text.Visibility = Visibility.Visible;
}
}
Regarding your comment below: yes, multiple instances of "secondTextBlock" will be created. See the Snoop screenshot below. But these multiple instances are OK; they do not have any negative impact.

How click a TextBlock in DataTemplate?

This is my XAML code:
<ListBox ItemsSource="{Binding}" Name="listBox">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<StackPanel Width="370">
<TextBlock Text="{Binding AuthorName}" x:Name="author" MouseEventLeftDown="click"/>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
And the Click Handler
private void click(object sender, RoutedEventArgs e)
{
if(author.Text.Equals("Hi"))
{
// Do Something Special
}
}
The error is:
Error: The name 'author' does not exist in the current context
But I don't understand what is causing this error or why it is occurring.

Your TextBlock with the Name author doesn't exist in the scope of your click handler because it's in a DataTemplate. What's happening is that the author TextBlock is created once for every one of your data items (Presumably an Author class or a Book class of some kind), so you literally can have dozens of controls named author.
You are better off casting your sender in your click handler to a text box and then checking its text property. Something like this:
private void click(object sender, RoutedEventArgs args)
{
var textBox = sender as TextBox;
if(textBox == null)
return;
if(textBox.Text.Equals("hi"))
{
// Do Something Crazy!
}
}

It's probably better to use a UI element designed for touch, such as a HyperlinkButton or a Button. You can style these any way you would like to - especially if you use Expression Blend - but it is good design to include some visual feedback about the Touch.
Also - I'm not sure about your == code - you're comparing the sender (a UI element) against some string expression?

First off, your TextBlock is defined in a DataTemplate; try x:Name instead of Name on your TextBlock.
Secondly it might be quite tricky to click your TextBlock since you will have to press an exact pixel in your TextBlock. To make it easier to click your TextBlock you might want to put a Background on your TextBlock, so it will be a lot easier to click. You can even make the background transparent:
Background="Transparent"

use the gesture listener for create an event handler like "tap" or double" or whatever.

Use this...
private void click(object sender, RoutedEventArgs e)
{
var author = (TextBlock)sender;
if (author.Text.Equals("Hi"))
{
// Do Something Special
}
}