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AddingNewDataItem event

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GridView

This is a migrated thread and some comments may be shown as answers.

miri asked on 15 Nov 2015, 06:53 AM

Hello,

I have a telerik radGridView that itemsSource binding to my list observableCollection<Class1>

i have a button that on her click event i i add a new item to my list, i want focus the new item first cell,

so i want do it with the event AddingNewDataItem but it not camming to this event.

heer is my xaml code:

heer is my C# code:

public partial class MainWindow : Window
{
public CollectionViewSource Source { get; set; }
public ObservableCollection<MyClass> list = new ObservableCollection<MyClass>();
public MainWindow()
{
InitializeComponent();
this.Source = new CollectionViewSource();
//var list = new ObservableCollection<MyClass>();
for (int i = 0; i < 10; i++)
{
var item = new MyClass { MyProp2 = i, MyProperty = i * 10 };
list.Add(item);
}
Source.Source = list;
this.DataContext = Source.View;
}
private void PricingGrid_RowEditEnded(object sender, Telerik.Windows.Controls.GridViewRowEditEndedEventArgs e)
{
if (e.EditOperationType == Telerik.Windows.Controls.GridView.GridViewEditOperationType.Insert)
{
this.DataContext = Source.View.OfType<MyClass>().OrderBy(c => c.MyProperty);
Source.Source = this.DataContext;
PricingGrid.SelectedItem = e.NewData;
PricingGrid.ScrollIntoView(e.NewData);
}
}
private void Button_Click(object sender, RoutedEventArgs e)
{
list.Add(new MyClass { MyProp2 = 4, MyProperty = 40 });
}
private void PricingGrid_AddingNewDataItem(object sender, Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs e)
{
}
}
public class MyClass
{
public int MyProperty { get; set; }
public int MyProp2 { get; set; }
}

thank for help!

miri.

7 Answers, 1 is accepted

answered on 17 Nov 2015, 02:25 PM

Hello Miri,

Please take a look at the Adding New Entries article of our documentation.

The reason the AddingNewDataItem is not fired is because it is raised by BeginInsert() which you have not used in your implementation.

So you simply have to replace

list.Add(new MyClass { MyProp2 = 4, MyProperty = 40 });

with

this.PricingGrid.BeginInsert();

in your Button_Click method and then add this line of code to your PricingGrid_AddingNewDataItem event handler:

e.NewObject = new MyClass { MyProp2 = 4, MyProperty = 40 };

Regards,
Dilyan Traykov
Telerik

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answered on 19 Nov 2015, 09:51 AM

thank,

but it not exactly what i want.

i do want add from view to model.

and i want add the row to spesifial index,

so i change and put e.cancel=true,

but now i cannot doing the focus :

my code :

public partial class MainWindow : Window
{
public CollectionViewSource Source { get; set; }
public ObservableCollection<MyClass> list = new ObservableCollection<MyClass>();
public MainWindow()
{
InitializeComponent();
this.Source = new CollectionViewSource();
//var list = new ObservableCollection<MyClass>();
for (int i = 0; i < 10; i++)
{
var item = new MyClass { MyProp2 = i, MyProperty = i * 10 };
list.Add(item);
}
Source.Source = list;
this.DataContext = Source.View;
}
private void PricingGrid_RowEditEnded(object sender, Telerik.Windows.Controls.GridViewRowEditEndedEventArgs e)
{
if (e.EditOperationType == Telerik.Windows.Controls.GridView.GridViewEditOperationType.Insert)
{
this.DataContext = Source.View.OfType<MyClass>().OrderBy(c => c.MyProperty);
Source.Source = this.DataContext;
PricingGrid.SelectedItem = e.NewData;
PricingGrid.ScrollIntoView(e.NewData);
}
}

MyClass dd = new MyClass { MyProp2 = 4, MyProperty = 40 };
int i = 0;
private void Button_Click(object sender, RoutedEventArgs e)
{
this.PricingGrid.BeginInsert();
dd = new MyClass { MyProp2 = 4+i, MyProperty = 40+i };
i++;
list.Add(dd);
}
private void PricingGrid_AddingNewDataItem(object sender, Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs e)
{
e.NewObject = dd;
e.Cancel = true;
}
}

answered on 25 Nov 2015, 04:35 PM

AddNewRowAndFocusFirstCell.zip

Hello Miri,

As this seems to be a very specific scenario, I'm afraid there's no straightforward way to achieve this.
I've prepared a sample project based on your first request to show you how it could be done.
Of course, you would have to change the algorithm for finding the insertion index, based on your logic.

However, the scenario you've described in your last post is very different from the one we started with. It implies that some if not all of the columns are disabled, which brings the question of how you will add the items. If you will add them through the code itself, you can easily choose at which index to add them with the Insert() method of the collection.

Please have a look at the sample project and let me know if it solves your problem. If that is not the case, we will need a better explanation of the situation in order to investigate further.

Regards,
Dilyan Traykov
Telerik

answered on 26 Nov 2015, 03:15 PM

Hello again Miri,

You can find more information about BeginEdit() in this article. BeginEdit's return type is void, thus it does not return anything. It's just tells RadGridView to start editing the selected item. So you need to make sure that you successfully select the added row. In my project this is accomplished by the following lines:

PricingGrid.SelectedItem = e.NewObject;

PricingGrid.BeginEdit();

Please make sure you're correctly selecting the newly-inserted item and if you still encounter problems please provide some sample code to help us investigate further.

Regards,
Dilyan Traykov
Telerik