CODEWITHSUNDEEP
wpfbindingtoolkit
Joe
Joe

Reputation: 91

Extended WPF Toolkit - Binding Text of richtextbox

I am newbie in WPF. I need make TwoWay and OneWayToSource bind to string variable. I want use richtextbox from Extended WPF Toolkit ,because I think it is the easy way.

So I try use richtebox from this library in xaml, code is here:

<Window x:Class="PokecMessanger.ChatWindow"
        xmlns:extToolkit="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit.Extended"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        Title="ChatWindow" Height="429" Width="924">

///...

        <extToolkit:RichTextBox Name="rtbRpText"  Text="{Binding _rpText, Mode=OneWayToSource}" Grid.Column="0"></extToolkit:RichTextBox>

In code behind, I have this code:

    private string _rpText = string.Empty;

    public ChatWindow(PokecCommands pokecCmd)
    {
        rtbRpText.DataContext = _rpText;
    }

Problem is, if I wrote something in richtextbox, variable _rpText is still empty, where can be problem?

Upvotes: 0

Views: 4728

Answers (2)

Kent Boogaart
Kent Boogaart

Reputation: 178630

Have you tried typing something and then shifting focus off the RichTextBox? I suspect your property will then be updated. If you want to update the property as you type, you'll need:

Text="{Binding _rpText, Mode=OneWayToSource, UpdateSourceTrigger=PropertyChanged}"

Upvotes: 2

user288295
user288295

Reputation:

Kent is correct. Your properties MUST impement the INotifyPropertyChanged interface for data binding to work properly in WPF/Silverlight.

The documentation explains how to bind your property to the RichTextBox:

Upvotes: 0

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