Question

This is a very simple question: I have a string defined in my C# class and I would like it to be the content of a XAML button. That’s it. What can I put in the ????. I know this is basic WPF… I will keep looking for an answer. Thanks in advance.

My XAML

<Window x:Class="BarScore.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        >

    <StackPanel>
        <Button Name="Start" Content="???" Height="25" Width="100"
           Margin="20" />
    </StackPanel>
</Window>

My C# code

using System;
using System.Windows;
using System.Windows.Controls;

namespace BarScore
{
    public partial class MainWindow : Window
    {
        public string BUTTON_NAME_STR = "START";

        public MainWindow()
        {
            InitializeComponent();
        }
    }
}

PS: I know I can go to the code and write:

Start.Content = BUTTON_NAME_STR;

but I would like it to be from XAML to C# and not the other way around, if possible.

Answer 1

For the binding to work, you will need to turn your field into a property like the following.

using System;
using System.Windows;
using System.Windows.Controls;

namespace BarScore
{
    public partial class MainWindow : Window
    {
        private string _BUTTON_NAME_STR = "START";
        public string BUTTON_NAME_STR
        {
           get
           {
                return _BUTTON_NAME_STR;
           }
           set
           {
                _BUTTON_NAME_STR = value;
           }
        }

        public MainWindow()
        {
            InitializeComponent();
            Start.DataContext=this;
        }
    }
}

Then set your binding to your property

<StackPanel>
    <Button Name="Start" Content="{Binding BUTTON_NAME_STR}"
       Height="25" Width="100"
       Margin="20" />
</StackPanel>

Some more links on it :

http://blogs.msdn.com/b/wpfsdk/archive/2006/10/19/wpf-basic-data-binding-faq.aspx

http://msdn.microsoft.com/en-us/magazine/cc163299.aspx