如何从js中获取返回值

Question

I have js script on loaded page by cefsharp browser, it is GetText(args) and it is return text. I have this code:

var script = chromiumWebBrowser.ExecuteScriptAsync("GetText", args);
string text = script.ToString();

But this dont work, because it is show error on creating script, implicitly typed variable cant assign void.

Also tryed get value by this code

object[] args = new string[0];
var d = chromiumWebBrowser.EvaluateScriptAsync("GetText", args).Result;
string b = d.ToString();

But b returns CefSharp.JavascriptResponse, not text. How I can get this returned value?

Answer 1

Well, the docs say ExecuteScriptAsync returns void .

In fact, they say (emphasis mine)

Execute some Javascript code in the context of this WebBrowser. As the method name implies, the script will be executed asynchronously, and the method therefore returns before the script has actually been executed.

so there can't be a return value.

You would probably need EvaluateScriptAsync , which returns a Task whose completion you can wait for; you can then read the Result from the JavascriptResponse the Task wraps.