Display line numbers in RichEditBox UWP
I would like to know if it is possible to show the line numbers (in a separate column) of the RichEditBox in UWP C # , or if there are other ways to get it. I'm looking for a solution to this problem ... And it seems strange to me that there is no documentation on this: I only need a simple text editor. There are many Windows 10 apps out there that implement it, and I refuse to think it's impossible.
This is just an example from CodeWriter, a code editor application. Any idea?
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I am getting the "result" thinking of the list and the RichEditBox. Now the solution is not a good one , after about 50 lines of typing it trapped like hell, but at least I tried because the question is important to me too.
So I designed ListView and RichEditBox in a 2 column grid
<ScrollViewer>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<ListView Grid.Column="0" Name="LineNumbers" ScrollViewer.VerticalScrollMode="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled"></ListView>
<RichEditBox Grid.Column="1" x:Name="RebText" TextChanged="RebText_TextChanged" ScrollViewer.VerticalScrollMode="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled"></RichEditBox>
</Grid>
</ScrollViewer>
In the code behind, I added this:
private void RebText_TextChanged(object sender, RoutedEventArgs e)
{
//Clear line numbers
LineNumbers.Items.Clear();
int i = 1;
//Get all the thext
ITextRange text = RebText.Document.GetRange(0, TextConstants.MaxUnitCount);
string s = text.Text;
if (s != "\r")
{
//Replace return char with some char that will be never used (I hope...)
string[] tmp = s.Replace("\r", "§").Split('§');
foreach (string st in tmp)
{
//String, adding new line
if (st != "")
{
LineNumbers.Items.Add(i++);
}
//No string, empty space
else
{
LineNumbers.Items.Add("");
}
}
}
}
I think the .clear () method and reading all lines every time is not good practice. But if you need a quick solution with a maximum of 50 lines, this MAYBE is the way to go.
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