XAML中的访问类变量

Question

I have a class defined as:

class Constants
{
   public static string settingsToolTip = "Settings";
}

I want to set this string for a tooltip of a button like:

<Button Name= "ButtonSettingsWindow" ToolTip="Settings" ToolTipService.ShowDuration="2000"/>

Instead of hardcoding the string "Settings" in XAML, I want it to use the string from Constants class. How can i do this in WPF XAML?

Answer 1

You can access static members of class using x:Static markup extension in XAML.

<Button ToolTip="{x:Static local:Constants.settingsToolTip}"/>

Make sure you have added namespace in XAML file ( local ) where Constant class is declared:

xmlns:local="clr-namespace:ActualNameSpace"

Answer 2

The answer you're looking for is binding.

Example:

Code behind:

 class Test
{
    public string test { get { return "Settings"; } }
}

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }
}

XAML:

<Window x:Class="WpfApplication2.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:y="clr-namespace:WpfApplication2"
    Title="MainWindow" Height="350" Width="525">
<Window.DataContext>
    <y:Test></y:Test>
</Window.DataContext>
<Grid>
    <Button Content="{Binding test}"></Button>
</Grid>

The result is a button that says "Settings" :)