将特定运行添加到 Windows.UI.Xaml.Controls.TextBlock 后，如何以编程方式访问它？

Question

I want to be able to programmatically access a specific run after adding it to a Windows.UI.Xaml.Controls.TextBlock but I cannot set the Name of a Run because the Name property is read only (allows get but not set).

Each run will be created dynamically through a loop (not at design time (xaml)), and I will not know the index (i-th) as they may be created in any order. I would know a word or keyword that would be in a run, but otherwise I have no other way to identify one individual run from another.

How can I programmatically find and access a specific Run that was added to a TextBlock, when I click a button?

using Windows.UI.Xaml.Controls;

var myTextBlock = new TextBlock(); 

var someRun = new Run
{   
     Text = "Some run to start"
};

myTextBlock.Inlines.Add(someRun)

var aRandomRun = new Run
{   
     Text = "A random run with some words"
};

myTextBlock.Inlines.Add(aRandomRun)

var anotherRun = new Run
{   
     Text = "Another run, could be anything"
};

myTextBlock.Inlines.Add(anotherRun)

private void GetTextButton_Click(object sender, RoutedEventArgs e)
{
    // Get the text of any of these above runs in myTextBlock

    // I tried "FindName" but since I cannot set the the name of the Run, I cannot use FindName to find the Run
    var anotherRunText = myTextBlock.Inlines.Where(x=> x.FindName
}

Answer 1

If your only way of distinguishing the Run 's from each other is by their text. You could indeed use what you have tried already, however instead of using the Name property you use the text property:

string FindInlineText(string keyword)
{
    string anotherRunText = ((Run)myTextBlock.Inlines.First(i => ((Run)i).Text.Contains(keyword))).Text;
    return anotherRunText;
}

It does not seem possible to approach this in another way, since Run.Name is get only in code behind, and although the Tag property should be inherited from the FrameworkContentElement class it is not available to set.

If you do need to use another identifier to distinguish the text elements from each other, you may look into using a horizontal StackPanel and multiple TextBlock instead:

StackPanel stack = new StackPanel { Orientation = Windows.UI.Xaml.Controls.Orientation.Horizontal };
for (int i = 0; i < 10; i++)
{ 
    stack.Children.Add(new TextBlock 
    { 
        Name = $"inlineblock_{i}", 
        Text = i.ToString() 
    }); 
}

And now you are ofcourse able to get the text of the correct TextBlock by using:

string certainText = ((TextBlock)stack.Children.First(i => ((TextBlock)i).Name == certainName)).Text;