How can I load data to datagrid in WPF without calling selectionchanged event?

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Hi,
When I try to load and set items to WPF DataGrid as:
DataGrid.ItemsSource=data;
I have a problem of calling SelectionChanged event for each DataGrid item added, instead of calling it only when DataGrid selection item changed after DataGrid items is loaded

What I have tried:

DataGrid.ItemsSource = Data;

DataGrid.ItemsSource = Data;

Posted 4-Feb-20 21:15pm

Member 13602078

Updated 4-Feb-20 21:30pm

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Pete O'Hanlon · Answer 1 · 2020-02-04T21:31:00

Solution 1

Disconnect your data context beforehand, then reattach it afterwards. I don't know what you have attached your DataContext to so here's an example using something called _myUserControl as the target of the DataContext, which we are storing in DataContextSource (this is an example only).

C#

private void ConnectData()
{
  _myUserControl.DataContext = null;
  DataGrid.ItemsSource = Data;
  _myUserControl.DataContext = DataContextSource;
  // Set your selected item if necessary.
}

Posted 4-Feb-20 21:31pm

Pete O'Hanlon

Comments

Member 13602078 5-Feb-20 6:42am

Thank you, but the problem does not solved, SelectionChanged event is called for each item added to DataGrid, I need to call it after loading all DaraGrid elements and when selection is changed

Pete O'Hanlon 5-Feb-20 7:17am

Are you subscribing to the SelectionChanged event? If you are, just disconnect from the event handler before you associate Data with your ItemsSource. Resubscribe to SelectionChange immediately after DataGrid.ItemsSource = Data;.