public override void Clear()
{
WindowsClipboard.Clear();
}
public static void Clear()
{
ClipboardProxy.Clear();
}
/// <summary>
/// Clears the clipboard and copies an HTML fragment to the clipboard, providing additional meta-information.
/// </summary>
/// <param name="htmlFragment">a html fragment</param>
/// <param name="title">optional title of the HTML document (can be null)</param>
/// <param name="sourceUrl">optional Source URL of the HTML document, for resolving relative links (can be null)</param>
public static void CopyHtmlToClipboard(string htmlFragment, string title, Uri sourceUrl)
{
StringBuilder sb = new StringBuilder();
if (title == null)
{
title = "From Clipboard";
}
// Builds the CF_HTML header. See format specification here:
// http://msdn.microsoft.com/library/default.asp?url=/workshop/networking/clipboard/htmlclipboard.asp
// The string contains index references to other spots in the string, so we need placeholders so we can compute the offsets.
// The <<<<<<<_ strings are just placeholders. We'll backpatch them actual values afterwards.
// The string layout (<<<) also ensures that it can't appear in the body of the html because the <
// character must be escaped.
string header = @"Format:HTML Format
Version:1.0
StartHTML:<<<<<<<1
EndHTML:<<<<<<<2
StartFragment:<<<<<<<3
EndFragment:<<<<<<<4
StartSelection:<<<<<<<3
EndSelection:<<<<<<<3
";
string pre =
@"<!DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 4.0 Transitional//EN"">
<HTML><HEAD><TITLE>" + title + @"</TITLE></HEAD><BODY><!--StartFragment-->";
string post = @"<!--EndFragment--></BODY></HTML>";
sb.Append(header);
if (sourceUrl != null)
{
sb.AppendFormat("SourceURL:{0}", sourceUrl);
}
int startHTML = sb.Length;
sb.Append(pre);
int fragmentStart = sb.Length;
sb.Append(htmlFragment);
int fragmentEnd = sb.Length;
sb.Append(post);
int endHTML = sb.Length;
// Backpatch offsets
sb.Replace("<<<<<<<1", To8DigitString(startHTML));
sb.Replace("<<<<<<<2", To8DigitString(endHTML));
sb.Replace("<<<<<<<3", To8DigitString(fragmentStart));
sb.Replace("<<<<<<<4", To8DigitString(fragmentEnd));
// Finally copy to clipboard.
string data = sb.ToString();
WinFormsClipboard.Clear();
WinFormsClipboard.SetText(data, TextDataFormat.Html);
}
