I have a web browser control embedded into a PhoneApplicationPage. I have to handle the hardware back button and force the web browser to go back.
I know how to handle hardware back button.
How do you force the webbrowser to go to a previous page? The seemingly simple GoBack()
and CanGoBack
property on WinForms webbrowser seems to be missing on Windows Phone.
I've just handled this same question inside Overflow7
I decided to handle this in C# rather than in Javascript. Basically, in my page I've added a stack of Uri's:
private Stack<Uri> NavigationStack = new Stack<Uri>();
then I've intercepted the Navigated event of the web browser:
void TheWebBrowser_Navigated(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
NavigationStack.Push(e.Uri);
}
then in the back key press override I try to navigate using the back button if I can:
protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
{
if (NavigationStack.Count > 1)
{
// get rid of the topmost item...
NavigationStack.Pop();
// now navigate to the next topmost item
// note that this is another Pop - as when the navigate occurs a Push() will happen
TheWebBrowser.Navigate(NavigationStack.Pop());
e.Cancel = true;
return;
}
base.OnBackKeyPress(e);
}
Note that this solution doesn't work perfectly with tombstoning - nor with "ajax" sites - but overall it seems to work pretty well.
If you enable script on the WebBrowser
control by setting IsScriptEnabled="true"
you can then use the following to navigate backwards within the browser:
private void backButton_Click(object sender, EventArgs e)
{
try
{
browser.InvokeScript("eval", "history.go(-1)");
}
catch
{
// Eat error
}
}
You can find this code (and a bit more) in Shaw Wildermuth's blog post Navigating with the WebBrowser Control on WP7.
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