NET C# ,
In my windows phone 7.5 application , I want to make visible the application bar if any item has selected .. So I am making it visible in selected change event. But what is happening in my code is when ever selection change it also triggers LostFocus event and in that event I am making selected index = 0.
Now the resultant of the code is when ever I select any item , application bar gets visible then automatically invisible ( because of lost focus event).
Following is the piece of code .
private void ShopingListItemDetails_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ShopingListItemDetails.SelectedIndex != -1)
{
ApplicationBar.IsVisible = true;
int selind = ShopingListItemDetails.SelectedIndex;
}
}
private void ShopingListItemDetails_LostFocus(object sender, RoutedEventArgs e)
{
ApplicationBar.IsVisible = false;
ShopingListItemDetails.SelectedIndex = -1;
}
I am just at start with .NET C#(XAML) so assuming that selection change event is also triggering LostFocus event.
Please help me what is the real problem behind.Thanks
Zauk
You can use the following hack. Initialize a variable, say selectChanged to False initially in the xaml.cs. In SelectionChanged function change it to True. Now, in the LostFocus function do processing only if the selectChanged variable is false, and if it is true set it back to False
Boolean selectChanged=false;
private void ShopingListItemDetails_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ShopingListItemDetails.SelectedIndex != -1)
{
ApplicationBar.IsVisible = true;
int selind = ShopingListItemDetails.SelectedIndex;
selectChanged=true;
}
}
private void ShopingListItemDetails_LostFocus(object sender, RoutedEventArgs e)
{
if(!selectChanged)
{
ApplicationBar.IsVisible = false;
ShopingListItemDetails.SelectedIndex = -1;
}
selectChanged=false;
}
I think this should solve your problem.
Related
I have a simple Windows Form: 'Message' TextBox has Enter and Leave events to allow user to enter text in another language only on that field. 'Send' button sends the form content. After the user fills the Message and clicks Send, Textbox's Leave event prevent button's Click event from firing. I need both handlers to run.
Here's the relevant code:
private void Message_Enter(object sender, EventArgs e)
{
inputLang = InputLanguage.CurrentInputLanguage;
foreach (InputLanguage lang in InputLanguage.InstalledInputLanguages)
{
if (lang.LayoutName == "United States-International")
{
InputLanguage.CurrentInputLanguage = lang;
break;
}
}
}
private void Message_Leave(object sender, EventArgs e)
{
InputLanguage.CurrentInputLanguage = inputLang;
}
private void Send_Click(object sender, EventArgs e)
{
string dest = ServerList.Text;
string msg = Message.Text;
if (dest.Length == 0 || msg.Length == 0 )
{
Log("Fill the destination server and the message");
return;
}
if (context.SendMessage(dest, msg))
{
if (!ServerList.Items.Contains(dest))
{
ServerList.Items.Add(dest);
}
}
else
{
if (ServerList.Items.Contains(dest))
{
ServerList.Items.Remove(dest);
}
}
}
The problem is now solved. The problem is caused by the change of input language. If the enter and leave handlers did other stuff then the click event will fire normally. Since I need to change the input language I solved it by monitoring the MouseDown, MouseClick and MouseUp events and generating a click if it was not automatically generated.
I've got same problem. When I changed the input language and then on leave event set it back to default one. When i click on other component it wont fire click event. I had to click twice then.
I thing it has something to do with focus.
I solved it by setting the focus back to form, after changing back the input language.
Here is the handler:
void textBoxSearch_LostFocus(object sender, EventArgs e)
{
InputLanguage.CurrentInputLanguage = InputLanguage.DefaultInputLanguage;
this.Focus();
}
Hope it helps...
Is there some trick to setting the back color of the row in the Telerik WinForms RadGridView at runtime in the RowFormatting event? I am able to set the RowElement.Font in this event but not the RowElement.BackColor. I have stepped through the code in the debugger and am certain that the line is being executed (the event is properly "wired up").
void grid_RowFormatting(object sender, Telerik.WinControls.UI.RowFormattingEventArgs e)
{
if (e.RowElement.RowInfo.Cells["CODE"].Value.ToString() == "X"))
{
// the following line is executed but has no apparent effect
e.RowElement.BackColor = System.Drawing.Color.Aqua;
}
}
Your code looks good, you just need to set DrawFill to true
Add this:
e.RowElement.DrawFill = true;
Full example:
void grid_RowFormatting(object sender, Telerik.WinControls.UI.RowFormattingEventArgs e)
{
if (e.RowElement.RowInfo.Cells["CODE"].Value.ToString() == "X"))
{
e.RowElement.DrawFill = true;
e.RowElement.BackColor = System.Drawing.Color.Aqua;
}
}
WP7.5/Silverlight App...
On my page load, I play a Sound clip (e.g. Hello! Today is a wonderful day.)
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
seLoadInstance = seLoad.CreateInstance(); //I initialize this seLoad in Initialize method
seLoadInstance.Play();
}
Now I have 3-4 other elements on the page. When user click on any of them, a sound clip for that element plays.
private void ElementClick_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
seElementInstance = seElement.CreateInstance();
seElementInstance .Play();
}
What I want is:
When the page first loads and while the seLoadInstance is being played and user clicks the element, I don't want the seElementInstance to be played.
I can check the state of seLoadInstance like below to not play seElementInstance
private void ElementClick_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if(seLoadTextInstance.State != SoundState.Playing)
{
seElementInstance = seElement.CreateInstance();
seElementInstance .Play();
}
}
But the problem with above is that I have another element that can play the seLoadInstance on it's click.
Problem: I don't know how to differentiate if the seLoadInstance being played is first time or upon element click.
Possible solution: One way I see is using different instances to play the same sound.
I was hoping some better way like I set a flag upon load but I couldn't find any explicit event for SoundInstance completed or Stopped that I can handle.
Any ideas??
Have not used sounds until now but what I have seen:
Why do you always create new instances when you want to play a sound?
Isn't it possible to create a instance for both "se"-elements and cust check if anyone is running before calling "play"?
For example:
private var seLoadInstance;
private var seElementInstance;
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
seLoadInstance = seLoad.CreateInstance();
seElementInstance = seElement.CreateInstance();
seLoadInstance.Play(); // no need to check if something is playing... nothing will be loaded
}
private void ElementClick_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if(seLoadInstance.State != SoundState.Playing && seElementInstance.State != SoundState.Playing)
{
seElementInstance .Play();
}
}
I was able to find a way using flag. Instead of setting a flag upon the firsttime load complete, I set the flag from one of my element that plays the seLoadTextInstance.
Something like below:
private bool isElementLoadSoundPlaying = false; //I set this to true below in another handler
private void ElementClick_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
//This if means LoadTextInstance is playing and it is the first time play
if(seLoadTextInstance.State != SoundState.Playing && isElementLoadSoundPlaying == false )
{
return;
}
seElementInstance = seElement.CreateInstance();
seElementInstance .Play();
}
private void ElementLoadTextClick_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
isElementLoadSoundPlaying = true;
seLoadInstance = seLoad.CreateInstance();
seLoadInstance.Play();
}
In my windows phone 7 app, I have the following code to handle the OnSelectedIndexChange of a ListBox.
private void wordList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
WordList selectedList = (WordList)e.AddedItems[0];
NavigationService.Navigate(new Uri("/Views/Game.xaml?ListName=" + selectedList.Name, UriKind.RelativeOrAbsolute));
}
The above code work fine, However if the user click on the hardware back button from the Game page, and click on the same listbox item, the above code is not called. I assume this is because the selected item is the same therefore the SelectionChanged event is not being called.
How do I make it so that if the user select the same item I can still send them to the Game page?
I looked at the Tap Event but I couldn't figure out a way to get the selected Item from the tab event.
When using SelectionChanged to navigate, surround your navigation logic with a check to see if the SelectedIndex = -1. After you navigate, set the index to -1, so that the event will not fire twice.
private void wordList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var lb = sender as ListBox;
if (lb != null)
{
if (lb.SelectedIndex == -1) return;
WordList selectedList = (WordList)e.AddedItems[0];
NavigationService.Navigate(new Uri("/Views/Game.xaml?ListName=" + selectedList.Name, UriKind.RelativeOrAbsolute));
lb.SelectedIndex = -1;
}
}
This way you can get the selected Item from the Tap event.
private void wordList_Tap(object sender, GestureEventArgs e)
{
var selectedElement = e.OriginalSource as FrameworkElement;
if (selectedElement != null)
{
var selectedData = selectedElement.DataContext as WordList;
if (selectedData != null)
{
NavigationService.Navigate(new Uri("/Views/Game.xaml?ListName=" + selectedData.Name, UriKind.RelativeOrAbsolute));
}
}
}
I had such issue within a UserControl. Check the sender, and return if it is not the ListBox control which is triggering the event:
protected void cbEvents_SelectedIndexChanged(object sender, EventArgs e)
{
if (sender is DropDownList)
RebindGrid();
}
The app is like a small dictionary. I have a listbox and a textbox. The list box is already filled with words and when there is any entry in the textbox the listbox is refilled again with words starting with the letters in the textbox. I have a listbox SelectionChanged event implemented when the user clicks on a word its meaning appears. The problem is when user selects a word from the list and then types something in the textbox, listBox SelectionChanged event is called i dont want this to happen because at this point of time my listbox's selected item is empty.I would like to have a event that is fired only when user selects something from the listbox. It should not be fired when the content of the listbox changes. Thank you
You can use
1.if (lstWords.SelectedItem != null)
2.lstWords.SelectedIndex = -1;
for e.g. following is the source code for text changed event and list selection change event
private void textBox1_TextChanged(object sender, TextChangedEventArgs e)
{
try
{
if (textBox1.Text.ToString().Equals(""))
{
XmlDictionaryRepository test = new XmlDictionaryRepository();
lstWords.ItemsSource = test.GetWordList(categorySelected,xmlFileName);
}
else
{
XmlDictionaryRepository test = new XmlDictionaryRepository();
lstWords.ItemsSource = test.GetMatchWordList(categorySelected, textBox1.Text.ToString(),xmlFileName);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString(), (((PhoneApplicationFrame)Application.Current.RootVisual).Content).ToString(), MessageBoxButton.OK);
}
}
private void lstWords_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
try
{
if (lstWords.SelectedItem != null)
{
string wordSelected = ((Glossy_Test.Dictionary)(lstWords.SelectedItem)).Word;
if (lstWords.SelectedItem != null)
{
NavigationService.Navigate(new Uri(string.Format("/DescribeWord.xaml?param1={0}¶m2={1}", wordSelected, categorySelected), UriKind.Relative));
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString(), (((PhoneApplicationFrame)Application.Current.RootVisual).Content).ToString(), MessageBoxButton.OK);
}
finally
{
// lstWords.SelectedIndex = -1;
}
}