Rank 1
i am using the following code to set the itemsource property to a GridView to a collection. But after setting the itemsource, when i try to access the items[0], I get an exception that there are no elements, event though the itemssource has some elements.
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this
.dgiEmail.ItemsSource = value;
this.dgEmail.Rebind();
if (ViewModel.SelectedEmailResults.Count == 0)
{
if (this.emailItemList1.Count > 0)
{
this.dgEmail.SelectedItem = this.dgEmail.Items[0];
}
}
3 Answers, 1 is accepted
Can you post more info about this collection?
All the best,Vlad
the Telerik team
Rank 1
public
ObservableCollection<ExchangeResultItem> EmailResults1
{
get { return this.emailItemList1; }
set
{
this.emailItemList1 = value;
this.dgEmail.ItemsSource = value;
this.dgEmail.Rebind();
if (ViewModel.SelectedEmailResults.Count == 0)
{
if (this.emailItemList1.Count > 0)
{
this.dgEmail.SelectedItem = this.dgEmail.Items[0];
}
}
else
{
foreach (ExchangeResultItem item in ViewModel.SelectedEmailResults)
{
this.dgEmail.SelectedItems.Add(item);
}
}
app.RaiseTaskComplete();
}
}
Why not use MVVM to achieve your goal? It will be better if you introduce SelectedItem property in your model and bind the grid SelectedItem to this property. I've attached an example project to illustrate you this. Instead service I've used BackgroundWorker to simulate asynchronous data retrieving.
Greetings,Vlad
the Telerik team