Tabs not handled correctly when using HTML provoder

[Paul]

UPDATE: I fixed this by loading the html string directly instead of first converting to a byte array.

So this:

    string text = File.ReadAllText(@"c:\temp\RichText.txt");

    Byte[] convertedText = Encoding.ASCII.GetBytes(text);

    RadDocument document = _htmlFormatProvider.Import(convertedText);

became this:

    string text = File.ReadAllText(@"c:\temp\RichText.txt");

    RadDocument document = _htmlFormatProvider.Import(text);

When I save and reload using an HtmlFormatProvider I get strange results with Tab characters.

Here is an example where the original text is "a<tab>b<tab>c".

The first time it is saved it looks like this. The tabs have been replaced with two "&nbsp;":
<style type="text/css">
.p_CC664AAA { margin: 0px 0px 12px 0px;text-align: left;text-indent: 0pt;padding: 0px 0px 0px 0px; } 
.s_6BF1D20F { font-family: 'Calibri';font-style: normal;font-size: 16px;color: #000000; } 
</style><p class="p_CC664AAA"><span class="s_6BF1D20F">a&nbsp; &nbsp; b&nbsp; &nbsp; c</span></p>

After reloading and saving again it looks like this. The two "&nbsp;" have been replaced with whitespace:
<style type="text/css">
.p_384D933F { margin: 0px 0px 0px 0px;text-align: left;text-indent: 0pt;padding: 0px 0px 0px 0px; } 
.s_6BF1D20F { font-family: 'Calibri';font-style: normal;font-size: 16px;color: #000000; } 
</style><p class="p_384D933F"><span class="s_6BF1D20F">a    b    c</span></p>

After reloading and saving again it looks like this. The whitespaces have been replaced with question marks:
<style type="text/css">
.p_384D933F { margin: 0px 0px 0px 0px;text-align: left;text-indent: 0pt;padding: 0px 0px 0px 0px; } 
.s_6BF1D20F { font-family: 'Calibri';font-style: normal;font-size: 16px;color: #000000; } 
</style><p class="p_384D933F"><span class="s_6BF1D20F">a? ? b? ? c</span></p>

Here is the sample code I am using for this test: 

public Form1()
{
    InitHtmlFormatProvider();
    InitializeComponent();
}

private static HtmlFormatProvider _htmlFormatProvider;

private static void InitHtmlFormatProvider()
{
    _htmlFormatProvider = new HtmlFormatProvider();
    var htmlExportSettings = new HtmlExportSettings();
    htmlExportSettings.DocumentExportLevel = DocumentExportLevel.Fragment;
    _htmlFormatProvider.ExportSettings = htmlExportSettings;
}

private void commandBarButtonLoad_Click(object sender, EventArgs e)
{
    string text = File.ReadAllText(@"c:\temp\RichText.txt");
    Byte[] convertedText = Encoding.ASCII.GetBytes(text);
    RadDocument document = _htmlFormatProvider.Import(convertedText);
    radRichTextBox1.Document = document;
}

private void commandBarButtonSave_Click(object sender, EventArgs e)
{
    string html = _htmlFormatProvider.Export(radRichTextBox1.Document);
    File.WriteAllText(@"c:\temp\RichText.txt", html);
}

[Svett]

Hello Paul,

I am glad to hear that you managed to resolve the issue. It seems that conversion to bytes loses the tabs due to encoding changes.

All the best,
Svett
the Telerik team