WebView2 ExecuteScriptAsync method returns encoded HTML

Question

I am using Microsoft Webview2 to load a web page and below code is used to read the HTML content

string html = await webView1.ExecuteScriptAsync("document.documentElement.outerHTML");

The resulting output html appears with all tag opening, closing and other special characters encoded like below

\u003Chtml lang=\"en\" data-mode=\"light\">\u003Chead>\n    \u003Cmeta charset=\"utf-8\">\n    \u003Cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\u003Ctitle data-argonaut-actions=\"true

Why does this happen? How do I get plain HTML?

Manual says that function returns "A JSON encoded string that represents the result of running the provided JavaScript." (learn.microsoft.com/en-us/dotnet/api/…) — Serg
– Serg, Commented May 4, 2023 at 21:57
Yes, the result of ExecuteScriptAsync in this case is a string containing a JSON encoded string. So you need to parse the result as JSON and get the string value out of it. This is described here: learn.microsoft.com/en-us/microsoft-edge/webview2/how-to/… — David Risney
– David Risney, Commented May 4, 2023 at 22:34

DrWeather · Accepted Answer · 2023-08-21 07:22:53Z

3

var html = await webView2.ExecuteScriptAsync("document.documentElement.outerHTML");
html = Regex.Unescape(html);
html = html.Remove(0, 1);
html = html.Remove(html.Length - 1, 1);

answered Aug 21, 2023 at 7:22

DrWeather

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