Changing whole document font/size

[Michael]

I've got a RichTextEditor that I'm filling with the output from an HtmlFormatProvider.Import

After I've imported, I'd like to change the font and font size for the entire document.  Is there a way to do this?

[Hristo]

Hello Michael,

Thank you for contacting Telerik Support.

Please refer to this help topic where you can find information regarding the Selection of text in our RichTextEditor control. Below is a code snippet with a sample implementation of selecting the available text in a RadDocument element and applying FontFamily and FontSize settings:

public Form1()
{
    InitializeComponent();

    //Load html document
    using (Stream stream = new MemoryStream(File.ReadAllBytes(@"..\..\..\sample.html")))
    {
        HtmlFormatProvider provider = new HtmlFormatProvider();
        this.radRichTextEditor1.Document = provider.Import(stream);
    }

    //Select the entire text
    DocumentPosition startPosition = this.radRichTextEditor1.Document.CaretPosition;
    DocumentPosition endPosition = new DocumentPosition(startPosition);
    startPosition.MoveToStartOfDocumentElement(this.radRichTextEditor1.Document);
    endPosition.MoveToEndOfDocumentElement(this.radRichTextEditor1.Document);
    this.radRichTextEditor1.Document.Selection.Clear();
    this.radRichTextEditor1.Document.Selection.AddSelectionStart(startPosition);
    this.radRichTextEditor1.Document.Selection.AddSelectionEnd(endPosition);

    //Change font family and size
    this.radRichTextEditor1.RichTextBoxElement.ChangeFontFamily(new Telerik.WinControls.RichTextEditor.UI.FontFamily("Verdana"));
    this.radRichTextEditor1.RichTextBoxElement.ChangeFontSize(Unit.PointToDip(16));
}

I would also suggest that you get acquainted with our demo application and RichTextEditor example. The source code of the project is usually located at: C:\Program Files (x86)\Telerik\UI for WinForms Q3 2014\Examples\RichTextEditor.

I hope that this information is useful. Should you have further question do not hesitate to write back.

Regards,
Hristo
Telerik