I'm try to retrieve the contents of a texblock and put it in a webbrower in order to avoid html content :
desc1 is a variable recovered OnNavigatedTo method when navigating between pages
the problem is that I generate this exception:
invalid ioerationexception
plz help
thank you
var desc1 = NavigationContext.QueryString["desc"] as String;
BrowserControl.NavigateToString("<html>"+desc1+"</html>");
I tried this and it this works for me,
try and set a variable to your desc1, then go back to the xaml editor and create a loaded event handler for your page which will do the webbrowser task
string s;
public MessAbout()
{
InitializeComponent();
var desc1 = "text" as string;
s = desc1;
}
private void loaded(object sender, RoutedEventArgs e)
{
webBrowser1.NavigateToString("<html>" + s + "</html>");
}
Related
[Sorry for my bad english]
I made a report about a job applicant profiles where the path of the applicant photo stored in the database .
I tried the following code :
private void ApplicantForm_BeforePrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
objectDataSource1.Fill();
// this.xrPictureBox1.ImageUrl = #"\\10.10.101.186\photo\" + Report.GetCurrentColumnValue("APPLICANT_PHOTO");
}
But all the photos that displayed was a picture of the first applicant.
Is there anything wrong with my code ?
You must put the code in the event BeforePrint of xrPictureBox1 :
private void xrPictureBox1_BeforePrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
xrPictureBox1.ImageUrl = #"\\10.10.101.186\photo\" + Report.GetCurrentColumnValue("APPLICANT_PHOTO");
}
///first I have crated Popular class for storing values
public class Popular
{
public string trk_mnetid,trk_title , art_mnetid, art_name, image_url;
}
/// create popularplaylist class
public partial class PopularPlaylist : PhoneApplicationPage
{
Popular popobj = new Popular();
List<Popular> pop = new List<Popular>();
/* call json parsing it and show only "titles" in List form when i m click on perticular title i need to show details in next screen which i paser and store in popular popularplaylist class.
i use navigationservice call new screen
*/
NavigationService.Navigate(new Uri("/Popular_Module/PopularPlaylist.xaml", System.UriKind.Relative));
}
// plz tell me how to get list data in next screen
Use querystring.
Passing Value: In MainPage.xaml.cs add the following
The easiest way to pass a parameter is just to use a string, something like:
private void btnNavigate_Click(object sender, RoutedEventArgs e)
{
string url=String.Format("/Page1.xaml?parameter={0}",popular);
NavigationService.Navigate(new Uri(url, UriKind.Relative));
}
Getting Value: In Page.xaml.cs add the following
Note: It is important to override the OnNavigatedTo and after that you can use the NavigationContext to get the passed parameter.
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
base.OnNavigatedTo(e);
List<string> parameterValue = NavigationContext.QueryString["parameter"];
}
Another popular syntax to get the value of the parameter is:
List<string> parameter = string.Empty;
if (NavigationContext.QueryString.TryGetValue("parameter", out parameter))
{
//do something with the parameter
}
need some help, when i click the tap_event I get a message box delete or cancel which works and the price is taken off the total but it does'nt update the shopping cart after, it crashes on "ListBoxCart.Items.Remove(curr), thanks in advance!
private void listBoxCart_Tap(object sender, GestureEventArgs e)
{
if (MessageBox.Show("Are you sure!", "Delete", MessageBoxButton.OKCancel)
== MessageBoxResult.OK)
{
foreach (Dvd curr in thisapp.ShoppingCart)
{
if (curr.Equals(listBoxCart.SelectedItem))
{
listBoxCart.Items.Remove(curr);
listBoxCart.SelectedIndex = -1;
total -= Convert.ToDecimal(curr.price);
NavigationService.Navigate(new Uri("/ShoppingCart.xaml", UriKind.RelativeOrAbsolute));
}
}
txtBoxTotal.Text = total.ToString();
listBoxCart.ItemsSource = thisapp.ShoppingCart;
}
else
{
NavigationService.Navigate(new Uri("/ShoppingCart.xaml", UriKind.RelativeOrAbsolute));
}
}
I have wrote an artile (sorry in french but you can read the XAML) : http://www.peug.net/2012/05/17/contextmenu-dans-listbox-datatemplate/
and in the code-behind : an example :
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
var menuItem = sender as MenuItem;
var fe = VisualTreeHelper.GetParent(menuItem) as FrameworkElement;
Dvd _fig = fe.DataContext as Dvd;
thisapp.ShoppingCart.Remove(_fig);
reloading();
}
When you set the ItemsSource property for the ListBox, it generates a read-only collection and displays them. What you're trying to do is access this read-only collection and modify it but because it's read-only, you can't do that.
Instead you can either have your collection implement the INotifyCollectionChanged interface and raise a collection changed event when the user has deleted the item or use an ObservableCollection instead to store your items. ObservableCollection implements the INotifyCollectionChanged interface for you so you can remove items from the ObservableCollection and the changes will reflect in the Listbox automatically.
ObservableCollection also implements INotifyPropertyChanged so any property updates will also be updated in the ListBox.
I am new to Windows Phone 7.
I clicked one button and got:
private void button1_click(object sender, RoutedEventArgs e)
{
}
Is it possible get the tag property and object type of sender?
You can get the Type by using the GetType() method:
sender.GetType();
If you want to cast it as a button, you can do this.
var myButton = sender as Button;
if(myButton != null)
var buttonTag = myButton.Tag;
Using as instead of (Button)sender means that instead of an exception being thrown if it can't be cast as a Button, it will simply return null. We can then check if it's null and, if it's not null, we can access its Tag property.
I have a simple user control in Windows Phone 7 and I want to get access to the querystring collection from the user controls Constructor. I have tried many ways and cannot seem to get acess to the containing XAML's querystring collection.
Essentially I am navigating to the page and the my user control is going to access the querystring value to write the value back to the interface.
Am I missing adding an assembly or reference or something?
I am not sure you should be trying to get at the information from the page's constructor, as it won't necessairly get called every time you land on this page. A better approach is to override the OnNavigatedTo method inherited from PhoneApplicationPage. Looking a little more carefully at your question, you may be trying to do this within a control embedded in the page, in which case you need to get at the Page in order to obtain the navigation information.
Regardless, the NavigationContext property from the page has a QueryString parameter that you can use to access the information you're after.
The following example assumes I have a parameter named "Message" in the query string when navigating to this page:
public partial class MyPage : PhoneApplicationPage
{
// Constructor
public MyPage()
{
InitializeComponent();
}
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
base.OnNavigatedTo(e);
String navigationMessage;
if (NavigationContext.QueryString.TryGetValue("Message", out navigationMessage))
{
this.textBlock1.Text = navigationMessage;
}
}
}
Sorry about that - I started to get there, and thanks for the clarification. Your best bet then is to walk up the visual tree from your control to find the Page, then you can have at the NavigationContext. In my sample below, I have a button on a custom control within the page, whose click event finds the nav context and looks for a certain navigation parameter - I couldn't tell from the question or your follow-up what would drive the control to "want" to find the content of the query string.
(Note about getting info from the ctor follows the code below)
public partial class WindowsPhoneControl1 : UserControl
{
public WindowsPhoneControl1()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
GetTheQueryString();
}
private void GetTheQueryString()
{
var result = "No Joy";
var page = FindRootPage(this);
if (page != null)
{
if (page.NavigationContext.QueryString.ContainsKey("Param"))
{
result = page.NavigationContext.QueryString["Param"];
}
}
queryStringText.Text = result;
}
private static PhoneApplicationPage FindRootPage(FrameworkElement item)
{
if (item != null && !(item is PhoneApplicationPage))
{
item = FindRootPage(item.Parent as FrameworkElement);
}
return item as PhoneApplicationPage;
}
}
Note that this won't work from the ctor because of how Xaml works...the Xml tag drives the ctor to be called, then properties are set as indicated, then it is added as a child/item/etc in its container. If you do need to get at the context ASAP using this "walk up the tree" technique, handle the Control's Loaded event, by which time the control does have a parent and a tree that can be walked...
public WindowsPhoneControl1()
{
InitializeComponent();
Loaded += WindowsPhoneControl1_Loaded;
}
private void WindowsPhoneControl1_Loaded(Object sender, RoutedEventArgs e)
{
GetTheQueryString();
}
I would add a property to the UserControl subclass that would be set by the page in its OnNavigatedTo() method.