Clear datagrid values in wpf

Question

I need to flush my datagrid everytime when a treeviewitem is clicked. My code is given below.

private void treeView1_SelectedItemCh         


        

Answer 1

You may consider using ObservableCollection<> class rather than IEnumerable<>.

ObservableCollection<User> users = new ObservableCollection<User>();
dataGrid1.ItemsSource = users;

You can clear the datagrid by using the below code.

users.Clear();

Answer 2

I have tried several approaches and this was by far the best and most reliable one:

dataGrid.Columns.Clear();
dataGrid.Items.Clear();
dataGrid.Items.Refresh();

Answer 3

You have to unbind the itemsource before you clear the item

MyGrid.ItemsSource = null;**//un-bind the itemsource first**
MyGrid.Items.Clear();**//**

Answer 4

If you are populating the DataGrid by using:

dataGrid.Items.Add(someObject);

Then you should be able to use:

dataGrid.Items.Clear(); 

To remove all the rows.

If you are binding to the ItemsSource like:

dataGrid.ItemsSource = someCollection;

Then you should be able to set the ItemsSource to null and it will remove all the rows.

EDIT:

Don't forget to refresh it:

dataGrid.Items.Refresh();

Answer 5

I had a public IEnumerable collection which is appended every time the function is called. So by overwriting it, I flushed the Data in my Datagrid.

Answer 6

If it is bound an Itemsource, the simplest way is

dataGrid1.ItemSource = null;