Make a WPF text box accept the enter key.

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I have a TextBox in WPF for information, and where someone can take notes.
The user can write in it, save it, etc. But, for some reason the TextBox won't take the enter key while the app is running.
If you type enough characters to get to the end of the text box a new line is made, but it won't make one if you press enter.

this is the XAML for my text box.

<TextBox x:Name="___informationBox_" HorizontalAlignment="Left" Height="326" Margin="358,40,0,0" Grid.Row="1" TextWrapping="Wrap" VerticalAlignment="Top" Width="432" Text="Logarithms are used to find the powers of numbers. 

They are also used in the Richter scale, the PH scale, and the Decibel scale. 

A logarithm is written like this: 

log a(b) = c

Where a is the base, b is the product, and c is the power in an exponential expression. 

the above is converted to an exponential expression like this:

a^c = b

THE LOG LAWS:

The log laws. 

log law 1:
log A + log B = log AB

log law 2:
log A - log B = log A/B

log law 3: 
log A^n = n log A

The change of base formula: log b C = (log a C) / (log a B)

" Grid.ColumnSpan="2"/>

So how can this be fixed?

What I have tried:

I've searched the internet looking for something that can fix this, didn't find it.

Posted 20-Oct-19 19:30pm

i like food

Updated 20-Oct-19 21:30pm

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dnxit · Accepted Answer · 2019-10-20T19:57:00

you can do it on KeyDown event like

HTML

<StackPanel>
  <TextBlock Width="300" Height="20">
    Type some text into the TextBox and press the Enter key.
  </TextBlock>
  <TextBox Width="300" Height="30" Name="textBox1"
           KeyDown="OnKeyDown"/>
  <TextBlock Width="300" Height="100" Name="textBlock1"/>
</StackPanel>

The following code behind creates the KeyDown event handler. If the key that is pressed is the Enter key, a message is displayed and you'll see a new line appended.

C#

private void OnKeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Return)
       {
		MessageBox.Show($"You entered : {textBox1.Text}");
		var sb = new StringBuilder();
		sb.Append(textBox1.Text);
		sb.AppendLine("");
		textBox1.Text = sb.ToString();
		textBox1.CaretIndex = textBox1.Text.Length;
	}
}

jimmson · Accepted Answer · 2019-10-20T21:30:00

Solution 2

Try this: Multiline for WPF TextBox - Stack Overflow[^]

The first answer explains what needs to be set:

TextWrapping="Wrap"
AcceptsReturn="True"

Posted 20-Oct-19 21:30pm

jimmson

Comments

i like food 21-Oct-19 5:03am

Than both of you, they are very helpful answers.