user2509738 さんの返信に感謝しますが、別のファイルを展開する代わりに、埋め込まれた画像を使用したかったのです。私は独自の解決策を思いついたので、完全を期すためにここに投稿します。
解析を少し簡単にするために、 http: //htmlagilitypack.codeplex.com にある HtmlAgilityPack を使用しました。
ここに HelpWindow.Xaml があります
<Window x:Class="POC_WpfHelpWindowUsingHtml.HelpWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="HelpWindow" Height="600" Width="800">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="50"/>
</Grid.RowDefinitions>
<WebBrowser x:Name="helpBrowser"/>
<StackPanel x:Name="controlPanel"
Grid.Row="1"
Orientation="Horizontal"
HorizontalAlignment="Right">
<Button x:Name="closeButton"
Margin="0,10,20,10" Width="100"
Content="Close"
Click="closeButton_Click"/>
</StackPanel>
</Grid>
</Window>
ファイル形式の HTML コンテンツは次のとおりです: HelpContent.html
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<table style="width: 100%;">
<tr>
<td>
</td>
<td style="align-content:center">
<img id="imgMyLogo" alt="My Logo" src="Images/MyLogo.png" width="100"/>
</td>
<td> </td>
</tr>
</table>
</body>
</html>
これは、魔法のほとんどを含む HelpWindow.xaml.cs ファイルです。
using System;
using System.IO;
using System.Windows;
using HtmlAgilityPack;
using System.Reflection;
namespace POC_WpfHelpWindowUsingHtml
{
/// <summary>
/// Interaction logic for HelpWindow.xaml
/// </summary>
public partial class HelpWindow : Window
{
public HelpWindow()
{
InitializeComponent();
Uri uri = new Uri(@"/HelpContent.html", UriKind.Relative);
System.Windows.Resources.StreamResourceInfo info
= System.Windows.Application.GetContentStream(uri);
Stream streamOriginalPage = info.Stream;
Stream streamModifiedPage = new MemoryStream();
StreamWriter streamWriter = new StreamWriter(streamModifiedPage);
// this is from HtmlAgilityPack
HtmlDocument doc = new HtmlDocument();
doc.Load(streamOriginalPage);
// find all the img elements
foreach (HtmlNode node in doc.DocumentNode.SelectNodes("//img"))
{
// change the image reference to an embedded string
string src = node.GetAttributeValue("src", "");
src = ConvertImageToEmbeddedString(src);
if (!string.IsNullOrWhiteSpace(src))
{
node.SetAttributeValue("src", src);
}
}
// save the changes
doc.Save(streamWriter);
streamWriter.Flush();
streamModifiedPage.Position = 0;
// send the Html content to the WebBrowser component
helpBrowser.NavigateToStream(streamModifiedPage);
}
private void closeButton_Click(object sender, RoutedEventArgs e)
{
this.Close();
}
private string ConvertImageToEmbeddedString(string source)
{
// find the image type
string imageType = "png";
if (source.ToLower().IndexOf("jpg") > -1) imageType = "jpg";
if (source.ToLower().IndexOf("ico") > -1) imageType = "ico";
// initialize the return value
string ret = "";
if (source.Length > 4)
{
if (!source.StartsWith("/"))
{
source = "/" + source;
}
// get the embedded image as a stream
Stream stream = Application.GetResourceStream(
new Uri("pack://application:,,," + source)).Stream;
if (stream != null)
{
// put the image into an Image object
System.Drawing.Image image = System.Drawing.Image.FromStream(stream);
if (image != null)
{
// prepend the text for Data URI scheme
ret = "data:image/" + imageType + ";base64,";
using (MemoryStream ms = new MemoryStream())
{
// convert the image into a MemoryStream
image.Save(ms, image.RawFormat);
// convert the image to base64 encoding
ret += Convert.ToBase64String(ms.ToArray());
}
}
}
}
return ret;
}
}
}