/// <exception cref="InvalidOperationException">When the underlying <see cref="WebViewControl"/> is not yet initialized.</exception>
/// <exception cref="ArgumentNullException"><paramref name="scriptName"/> is <see langword="null"/></exception>
internal Task <string> InvokeScriptAsync(string scriptName, IEnumerable <string> arguments)
{
Verify.IsFalse(IsDisposed);
Verify.IsNotNull(_webViewControl);
Verify.IsNeitherNullNorEmpty(scriptName);
if (string.IsNullOrEmpty(scriptName))
{
throw new ArgumentNullException(nameof(scriptName));
}
// Cannot invoke script
if (_webViewControl == null)
{
throw new InvalidOperationException(DesignerUI.E_WEBVIEW_CANNOT_INVOKE_BEFORE_INIT);
}
// Protect against the cross domain scripting attacks
// If it is our internal navigation to about:blank for navigating to null or load string or before navigation has happened, Source will be null
var currentSource = Source;
if (currentSource != null)
{
Security.DemandWebPermission(currentSource);
}
return(_webViewControl
.InvokeScriptAsync(scriptName, arguments)
.AsTask());
}
private async void InvokeScript()
{
// Invoke the javascript function called 'doSomething' that is loaded into the WebView.
try
{
string result = await WebViewControl.InvokeScriptAsync("doSomething", null);
rootPage.NotifyUser($"Script returned \"{result}\"", NotifyType.StatusMessage);
}
catch (Exception ex)
{
string errorText = null;
switch (ex.HResult)
{
case unchecked ((int)0x80020006):
errorText = "There is no function called doSomething";
break;
case unchecked ((int)0x80020101):
errorText = "A JavaScript error or exception occured while executing the function doSomething";
break;
case unchecked ((int)0x800a138a):
errorText = "doSomething is not a function";
break;
default:
// Some other error occurred.
errorText = ex.Message;
break;
}
rootPage.NotifyUser(errorText, NotifyType.ErrorMessage);
}
}
private async void WebViewControl_LoadCompleted(object sender, NavigationEventArgs e)
{
// var result = await GetKeywordsAS.Autosuggest();
StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Helpers/WebviewScript.js"));
if (file != null)
{
string js = await FileIO.ReadTextAsync(file);
//await GetContentFromFile(file);
//eval函数大家都知道，就是执行一段字符串
await WebViewControl.InvokeScriptAsync("eval", new string[] { js });
}
}
private async void GetBrowserCookie()
{
bool loggedin = false;
try
{
var httpBaseProtocolFilter = new HttpBaseProtocolFilter();
var cookieManager = httpBaseProtocolFilter.CookieManager;
var cookieCollection = cookieManager.GetCookies(HomeUri);
loggedin = cookieCollection.Where(c => c.Name.Equals("SESSID")).Count() > 0;
if (loggedin)
{
string channel = await registerPushChannel();
string[] objArray = new string[1];
objArray[0] = "updatePushToken({ mpn: \"" + channel + "\"})";
await WebViewControl.InvokeScriptAsync("eval", objArray);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
this.showNoInternetMessageAndCloseApp();
}
if (loggedin == false)
{
if (alreadyhandled == false)
{
try
{
List <string> parms = new List <string>();
parms.Add("$('.showSideNav').trigger('click');");
await WebViewControl.InvokeScriptAsync("eval", parms);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
this.showNoInternetMessageAndCloseApp();
}
}
}
alreadyhandled = true;
}
private async void WebView_NavigationCompleted(WebView sender, WebViewNavigationCompletedEventArgs args)
{
string result = await WebViewControl.InvokeScriptAsync("eval", new string[] { "window.alert = function (AlertMessage) {window.external.notify(AlertMessage)}" });
}
public async Task <string?> ExecuteScriptAsync(string script)
{
return(await webview.InvokeScriptAsync("eval", new string[] { script }));
}
