problem with richedittext

Question

private void ComboChanged(object sender, SelectionChangedEventArgs e) {

       richEbitBox.Document.GetText(TextGetOptions.AdjustCrlf, out string value);  
        var id = sender as ComboBox;  

        switch (id.Tag) {  

            case "1":  
                //Todo implement new font  
                string fontName = id.SelectedItem.ToString();  
                richEbitBox.Document.Selection.CharacterFormat.Name = fontName;  
                break;  
            case "2":  
                var size = (float)id.SelectedItem;  
                richEbitBox.FontSize = size; // I tried this, and it did not work

richEbitBox.Document.Selection.CharacterFormat.Size = size; // Also this docent work

                richEbitBox.Document.SetText(TextSetOptions.None, value);  
                break;  
            default:  
                break;  
        }  
    }

As you can see I am able to change the font, not the size alt text

Accepted Answer

Hello,

Welcome to our Microsoft Q&A platform!

You need to set the selected text before you want to change the font or the size. If you haven't selected some text, neither font or size will be changed when you click the ComboBox. So you shouldn't use richEbitBox.Document.GetText() but use richEbitBox.Document.Selection.SetRange() instead.
For example, the following code shows how to change all the text sizes.

MyBox.Document.Selection.SetRange(0, MyBox.Document.Selection.EndPosition);  
            switch (id.Tag)  
            {  
  
                case "1":  
                    //Todo implement new font name  
                    string fontName = id.SelectedItem.ToString();  
                    MyBox.Document.Selection.CharacterFormat.Name = fontName;  
                    break;  
                case "2":  
                    var size = (float)id.SelectedItem;  
                    //set size to the Selection  
                    MyBox.Document.Selection.CharacterFormat.Size = size;  
                    break;  
                default:  
                    break;  
            }

Thanks.

Answer

OK let me try this, the biggest problem that I have is that when I go and click the combo box, the richEditbox lose its focus alt text

@RoyLiWicresoftNorthAmericaLtd-0833

Answer

oh by the way, I have another problem @RoyLiWicresoftNorthAmericaLtd-0833 I want to click a buton and start dictating and click again to stop, right now, I dictate an it will time out

` case "0":
using (SpeechRecognizer recognizer = new SpeechRecognizer()) {
await recognizer.CompileConstraintsAsync();
recognizer.Timeouts.InitialSilenceTimeout = TimeSpan.FromHours(1);
recognizer.Timeouts.EndSilenceTimeout = TimeSpan.FromHours(1);

                    recognizer.UIOptions.AudiblePrompt = "Say whatever you want";  
                    recognizer.UIOptions.ExampleText = "hello world";  
                    recognizer.UIOptions.ShowConfirmation = true;  

                    var result = await recognizer.RecognizeWithUIAsync();  
                    var dialog = new MessageDialog(result.Text, "Text");  

                    richEbitBox.Document.GetText(TextGetOptions.AdjustCrlf, out string value);  
                    richEbitBox.Document.SetText(TextSetOptions.None, value += result.Text);  
                }  
                break;`

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problem with richedittext

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