How to parse text with WebView2 control-CodePudding

I need to get the text that constantly changing from a website that does not load with the old Web Browser control, so I'm moving for the first time steps on WebView2

The html I want to parse is:

<td data-v-39c7db2a="" >
0.0000%
</td>

the value I need is the percentage. The code I'm using is

Private Sub WebView2_NavigationCompleted(sender As Object, e As CoreWebView2NavigationCompletedEventArgs) Handles WebView2.NavigationCompleted

Dim text As String = Await WebView2.ExecuteScriptAsync("document.getElementById('text-right').selectedIndex")
MessageBox.Show(text)

It doesn just return a messagebox with "null" It's kind of complicated now to move from the old webbrowser control to the WebView, also because of the lack of documentation.

CodePudding user response：

This is not really associated with WebView2 but a pure javascript problem.

You need to use:

document.querySelector('td.text-right').textContent

This returns the text for the first table cell with class name 'text-right'.

However this might not work for you if there's more than one table cell with the class name `text-right'.

In that case you can query for the nth child, where n is the child index:

document.querySelector('td.text-right:nth-child(7)').textContent

To get the percentage value as a Double:

Dim percent as Double = Double.Parse(Regex.Match(text, "[\d.] ").ToString(), CultureInfo.InvariantCulture);