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WebBrowser.InvokeScript Method (String)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Executes the specified script, which is defined in the currently loaded HTML.

Namespace:  System.Windows.Controls
Assembly:  System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Function InvokeScript ( _
    scriptName As String _
) As Object

public Object InvokeScript(
    string scriptName
)

Parameters

  • scriptName
    Type: System.String
    The name of the script to execute.

Return Value

Type: System.Object
The result of the script invocation.

Exceptions

Exception Condition
SecurityException

The script target is at a cross-___domain ___location.

Remarks

If the call to InvokeScript loads cross-___domain content, you can no longer interact with that content with InvokeScript. For security reasons, you cannot call this method on script targets hosted inside an <iframe>.

Examples

In the following example, InvokeScript is called, which in turn calls the LoadSearch function in the following HTML. The HTML file must be hosted in the same ___domain as the Silverlight application.

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title></title>
    <script type="text/javascript" >
    function LoadSearch(searchString) {
        window.___location = "https://www.bing.com/search?q=" + searchString
        window.external.notify("Search completed")
     }
     </script>
 </head>
<body>
Silverlight WebBrowser control.
</body>
</html>

Partial Public Class MainPage
    Inherits UserControl
    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub WB1_ScriptNotify(ByVal sender As Object, ByVal e As NotifyEventArgs)
        Button1.Content = e.Value

        Button1.IsEnabled = False
    End Sub

    Private Sub Button1_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
        Dim results As Object = WB1.InvokeScript("LoadSearch", New String() {"Silverlight"})
    End Sub
End Class

public partial class MainPage : UserControl
{
    public MainPage()
    {
        InitializeComponent();
    }

    void WB1_ScriptNotify(object sender, NotifyEventArgs e)
    {
        Button1.Content = e.Value;
        Button1.IsEnabled = false;

    }

    private void Button1_Click(object sender, RoutedEventArgs e)
    {
        object results = WB1.InvokeScript("LoadSearch", new string[] { "Silverlight" });
    }
}

<StackPanel x:Name="LayoutRoot" Height="358" Width="489" Background="LightBlue">
    <WebBrowser  x:Name="WB1" Source="https://localhost/HTMLPage1.htm" Height="272" Width="379" 
                 ScriptNotify="WB1_ScriptNotify" Margin="5" />
    <Button Width="200" x:Name="Button1" Content="Click to search!" Click="Button1_Click" />
</StackPanel>

Version Information

Silverlight

Supported in: 5, 4

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.