WebView.InvokeScriptAsync(String, IIterable<String>) Method

Reference

Definition

Namespace:: Windows.UI.Xaml.Controls

Important

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Executes the specified script function from the currently loaded HTML, with specific arguments, as an asynchronous action.

public:
 virtual IAsyncOperation<Platform::String ^> ^ InvokeScriptAsync(Platform::String ^ scriptName, IIterable<Platform::String ^> ^ arguments) = InvokeScriptAsync;

/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<winrt::hstring> InvokeScriptAsync(winrt::hstring const& scriptName, IIterable<winrt::hstring> const& arguments);

[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<string> InvokeScriptAsync(string scriptName, IEnumerable<string> arguments);

function invokeScriptAsync(scriptName, arguments)

Public Function InvokeScriptAsync (scriptName As String, arguments As IEnumerable(Of String)) As IAsyncOperation(Of String)

Parameters

scriptName: String
Platform::String

winrt::hstring

The name of the script function to invoke.

arguments: IIterable<String>

IEnumerable<String>

IIterable<Platform::String>

IIterable<winrt::hstring>

A string array that packages arguments to the script function.

Returns

IAsyncOperation<String>

IAsyncOperation<Platform::String>

IAsyncOperation<winrt::hstring>

An asynchronous operation object from which, on successful completion, you can retrieve the string result of the script invocation (or an empty string if the result of the script is not a string).

Attributes: RemoteAsyncAttribute

Remarks

To prevent malicious code from exploiting your app, be sure to call this method to invoke only scripts that you trust.

The invoked script can return only string values. If the return value is not a string, an empty string is returned. For example, WebView.InvokeScriptAsync("eval", "1==1") returns an empty string rather than true, unless you use toString: WebView.InvokeScriptAsync("eval", "(1==1).toString()").

Your app might appear unresponsive while scripts are running. Handle the LongRunningScriptDetected event to interrupt a long-running script.

Applies to

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