How do I save RichTextBox content into SQL varbinary (byte array) column? - xaml

Question

I want to save content of a RichTextBox to varbinary (= byte array) in XamlPackage format.
I need technicial advise on how to it.
I actually need to know how to convert between FlowDocument to byte array.
Is it even recommended to store it as varbinary, or this is a bad idea?
Update
Code snippet:
///Load
byte[] document = GetDocumentFromDataBase();
RickTextBox tb = new RickTextBox();
TextRange tr = new TextRange(tb.Document.ContentStart, tb.Document.ContentEnd)
tr.Load(--------------------------) //Load from the byte array.
///Save
int maxAllowed = 1024;
byte[] document;
RichTextBox tb = new RichTextBox();
//User entered text and designs in the rich text
TextRange tr = new TextRange(tb.Document.ContentStart, tb.Document.ContentEnd)
tr.Save(--------------------------) //Save to byte array
if (document.Length > maxAllowed)
{
MessageBox.Show((document.Length - maxAllowed) + " Exceeding limit.");
return;
}
SaveToDataBase();
TextRange

Answer 1

I can't find my full example right now, but you can use XamlReader and XamlWriter to get the document into and out of a string. From there, you can use UnicodeEncoding, AsciiEncoding or whatever encoder you want to get it into and out of bytes.
My shorter example for setting the document from a string...
docReader is my flow document reader
private void SetDetails(string detailsString)
{
if (docReader == null)
return;
if (String.IsNullOrEmpty(detailsString))
{
this.docReader.Document = null;
return;
}
using (
StringReader stringReader = new StringReader(detailsString))
{
using (System.Xml.XmlReader reader = System.Xml.XmlReader.Create(stringReader))
{
this.docReader.Document = XamlReader.Load(reader) as FlowDocument;
}
}
}