CefSharp LoadHtml

CefSharp LoadHtml

CefSharp is a .NET wrapper for the Chromium Embedded Framework (CEF), which is a web browser engine based on the Chromium project. With CefSharp, you can embed a web browser in your .NET application and use it to display HTML content, execute JavaScript code, and more.

To load HTML content into a CefSharp browser using the LoadHtml method, you need to do the following:

  • Create a new instance of the ChromiumWebBrowser class, which represents the CefSharp browser control.
var browser = new ChromiumWebBrowser();
  • Call the LoadHtml method on the browser instance, passing in the HTML content you want to display as a string.
browser.LoadHtml("<html><body><h1>Hello, world!</h1></body></html>");
  • Add the browser control to your application's user interface.
Controls.Add(browser);
  • Run your application and the HTML content should be displayed in the CefSharp browser control.
Application.Run(this);

Note that the LoadHtml method does not support loading external resources (such as images or stylesheets) referenced in the HTML content. If your HTML content references external resources, you will need to load them separately using CefSharp's resource loading APIs.

Examples

  1. "CefSharp LoadHtml example"

    • Code:
      CefSharp.WinForms.ChromiumWebBrowser browser = new CefSharp.WinForms.ChromiumWebBrowser();
browser.LoadHtml("<html><body><h1>Hello, CefSharp!</h1></body></html>", "http://example/");
    • Description: Demonstrates the basic usage of LoadHtml to display a simple HTML content in a CefSharp browser.

  2. "CefSharp LoadHtml with CSS"

    • Code:
      string htmlContent = "<html><head><style>body { background-color: #f0f0f0; }</style></head><body><h1>Styled Content</h1></body></html>";
browser.LoadHtml(htmlContent, "http://example/");
    • Description: Illustrates loading HTML content with embedded CSS for styling within the CefSharp browser.

  3. "CefSharp LoadHtml with JavaScript"

    • Code:
      string htmlWithScript = "<html><body><button onclick=\"showAlert()\">Click me</button><script>function showAlert() { alert('Hello, CefSharp!'); }</script></body></html>";
browser.LoadHtml(htmlWithScript, "http://example/");
    • Description: Shows how to load HTML content containing JavaScript, enabling dynamic behavior in the CefSharp browser.

  4. "CefSharp LoadHtml from file"

    • Code:
      string filePath = "path/to/your/file.html";
string htmlFromFile = File.ReadAllText(filePath);
browser.LoadHtml(htmlFromFile, "file:///" + filePath.Replace('\\', '/"));
    • Description: Loads HTML content from a file into the CefSharp browser, useful for displaying local HTML files.

  5. "CefSharp LoadHtml with custom scheme"

    • Code:
      CefSharp.CefCustomScheme scheme = new CefSharp.CefCustomScheme
{
    SchemeName = "custom",
    SchemeHandlerFactory = new CustomSchemeHandlerFactory()
};
CefSharp.Cef.RegisterScheme(scheme);
browser.LoadHtml("<html><body><h1>Custom Scheme Content</h1></body></html>", "custom://example/");
    • Description: Demonstrates loading HTML content using a custom scheme in CefSharp, allowing for custom handling of the content.

  6. "CefSharp LoadHtml with post data"

    • Code:
      CefSharp.Handler.CefSharpRequestHandler requestHandler = new CefSharp.Handler.CefSharpRequestHandler();
requestHandler.OnBeforeResourceLoad += (sender, args) => args.PostData = CefSharp.CefPostData.Create();
browser.RequestHandler = requestHandler;
browser.LoadHtml("<html><body><h1>LoadHtml with Post Data</h1></body></html>", "http://example/");
    • Description: Shows how to use LoadHtml with post data, useful for simulating form submissions or sending data to the loaded HTML.

  7. "CefSharp LoadHtml and execute JavaScript"

    • Code:
      browser.LoadHtml("<html><body><h1 id='demo'>Hello, CefSharp!</h1></body></html>", "http://example/");
browser.ExecuteScriptAsync("document.getElementById('demo').innerHTML = 'Modified by JavaScript';");
    • Description: Illustrates loading HTML content and executing JavaScript after the page has been loaded in the CefSharp browser.

  8. "CefSharp LoadHtml with custom headers"

    • Code:
      var headers = new Dictionary<string, string> { { "Custom-Header", "Value" } };
browser.LoadHtml("<html><body><h1>Custom Headers</h1></body></html>", "http://example/", headers);
    • Description: Demonstrates loading HTML content with custom headers in the CefSharp browser.

  9. "CefSharp LoadHtml and capture screenshot"

    • Code:
      browser.LoadHtml("<html><body><h1>Capture Screenshot Example</h1></body></html>", "http://example/");
await browser.WaitForLoadCompletionAsync();
var screenshot = await browser.ScreenshotAsync();
screenshot.Save("screenshot.png");
    • Description: Shows how to load HTML content, wait for the page to load completely, and capture a screenshot in the CefSharp browser.

  10. "CefSharp LoadHtml with proxy settings"

    • Code:
      CefSharp.CefSettings settings = new CefSharp.CefSettings();
settings.CefCommandLineArgs.Add("proxy-server", "http://your-proxy-server");
CefSharp.Cef.Initialize(settings);
browser.LoadHtml("<html><body><h1>Proxy Settings Example</h1></body></html>", "http://example/");
    • Description: Demonstrates how to set up proxy settings using CefSharp when loading HTML content in the browser.

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