I am working in silverlight and under a very strange situation that i need to implement my own SelectionChangedEventHandler handler function .The reason to do so is:
I have my situation like this :
private static Grid GenerateList(Parameter param, int LoopCount, Grid g)
{
Grid childGrid = new Grid();
ColumnDefinition colDef1 = new ColumnDefinition();
ColumnDefinition colDef2 = new ColumnDefinition();
ColumnDefinition colDef3 = new ColumnDefinition();
childGrid.ColumnDefinitions.Add(colDef1);
childGrid.ColumnDefinitions.Add(colDef2);
childGrid.ColumnDefinitions.Add(colDef3);
TextBlock txtblk1ShowStatus = new TextBlock();
TextBlock txtblkLabel = new TextBlock();
ListBox lines = new ListBox();
ScrollViewer scrollViewer = new ScrollViewer();
scrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Visible;
lines.ItemsSource = param.Component.Attributes.Items;
scrollViewer.Content = lines;
Grid.SetColumn(scrollViewer, 1);
Grid.SetRow(scrollViewer, LoopCount);
childGrid.Children.Add(scrollViewer);
lines.SelectedIndex = 0;
lines.SelectedItem = param.Component.Attributes.Items;// This items contains 1000000,3 00000, and so on.
lines.SelectionChanged += new SelectionChangedEventHandler(List_SelectionChanged);
// lines.SelectionChanged += new SelectionChangedEventHandler(List_SelectionChanged(lines, txtblk1ShowStatus));
lines.SelectedIndex = lines.Items.Count - 1;
Grid.SetColumn(txtblk1ShowStatus, 2);
Grid.SetRow(txtblk1ShowStatus, LoopCount);
childGrid.Children.Add(txtblk1ShowStatus);
g.Children.Add(childGrid);
return (g);
}
static void List_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
MessageBox.Show("clist _SelectionChanged1");
//The problem is line below because i am "lines" and "txtblk1ShowStatus" are not in the
//scope of this function and i cannot declare them globally.
txtblk1ShowStatus.Text = lines[(sender as ListBox).SelectedIndex];
}
Here you can see that i have no access of of "lines" and "txtblk1ShowStatus" in the List_SelectionChanged(object sender, SelectionChangedEventArgs e)
function. And i cannot declate the button and list globally because this function GenerateList(...)
will be reused and it's just coded in c# (no xaml used).Please let me know how to do that and also explain how to do that if you have another way to do but please explain your code with detail
I think a lambda expression will help you solve your issues (you might need to edit it):
lines.SelectedIndex = 0;
lines.SelectedItem = param.Component.Attributes.Items;// This items contains 1000000,3 00000, and so on.
lines.SelectionChanged += (o,e) => {
MessageBox.Show("clist _SelectionChanged1");
txtblk1ShowStatus.Text = lines.SelectedItem.ToString();
};
lines.SelectedIndex = lines.Items.Count - 1;