WebView.ExecuteScriptAsync

method · WebView · cAlgo.API

DesktopCLICloud

Executes JavaScript code from the javaScript parameter in the current top level document rendered in the WebView. You can only use this method after control is fully loaded and navigation is completed.

Environment behaviour

CLI — not supported. Accepted without error but never displayed, so control events such as Click are never raised.

Cloud — not supported. Accepted without error but never displayed, so control events such as Click are never raised.

Overloads

Signature	Description
`ExecuteScriptAsync(string javaScript)`	Executes JavaScript code from the javaScript parameter in the current top level document rendered in the WebView. You can only use this method after control is fully loaded and navigation is completed.
`ExecuteScriptAsync(string javaScript, Action<ExecuteScriptResult> callback)`	Executes asynchronously JavaScript code from the javaScript parameter in the current top level document rendered in the WebView. You can only use this method after control is fully loaded and navigation is completed.

ExecuteScriptAsync(string javaScript)

Executes JavaScript code from the javaScript parameter in the current top level document rendered in the WebView. You can only use this method after control is fully loaded and navigation is completed.

C#Python

public void ExecuteScriptAsync(string javaScript)

webView.ExecuteScriptAsync(javaScript: str) -> None

Parameters

Name	C# type	Python type	Description
`javaScript`	`string`	`str`	JavaScript code

Examples

C#Python

var webView = new WebView { Width = 300, Height = 100 };
webView.NavigateToStringAsync("<html><body id='price'></body></html>");
webView.NavigationCompleted += args => webView.ExecuteScriptAsync("document.getElementById('price').innerText = '" + Symbol.Bid + "'");
Chart.AddControl(webView);

webView = WebView()
webView.Width = 300
webView.Height = 100
webView.NavigateToStringAsync("<html><body id='price'></body></html>")
webView.NavigationCompleted += lambda args: webView.ExecuteScriptAsync(f"document.getElementById('price').innerText = '{api.Symbol.Bid}'")
api.Chart.AddControl(webView)

ExecuteScriptAsync(string javaScript, Action<ExecuteScriptResult> callback)

Executes asynchronously JavaScript code from the javaScript parameter in the current top level document rendered in the WebView. You can only use this method after control is fully loaded and navigation is completed.

C#Python

public void ExecuteScriptAsync(string javaScript, Action<ExecuteScriptResult> callback)

webView.ExecuteScriptAsync(javaScript: str, callback: Callable[[ExecuteScriptResult], None]) -> None

Parameters

Name	C# type	Python type	Description
`javaScript`	`string`	`str`	JavaScript code
`callback`	`Action<ExecuteScriptResult>`	`Callable[[ExecuteScriptResult], None]`	The callback that will be called after execution finished

Examples

C#Python

var webView = new WebView { Width = 300, Height = 100 };
webView.NavigateToStringAsync("<html><body>Hello</body></html>");
webView.NavigationCompleted += args => webView.ExecuteScriptAsync("document.body.innerText", result => Print("Successful: {0}, JSON: {1}", result.IsSuccessful, result.Json));
Chart.AddControl(webView);

webView = WebView()
webView.Width = 300
webView.Height = 100
webView.NavigateToStringAsync("<html><body>Hello</body></html>")
webView.NavigationCompleted += lambda args: webView.ExecuteScriptAsync("document.body.innerText", lambda result: api.Print(f"Successful: {result.IsSuccessful}, JSON: {result.Json}"))
api.Chart.AddControl(webView)