WPF DataGrid Remove SelectedItems

Question

Recently I've been working on a project which imports data programmicaly into a WPF DataGrid.

I'm almost done with the project but the thing that I left out was a button to remove selected cells and this is where I'm stuck!

I wrote this code using my basic knowledge of DataGrids:

var grid = dataGrid1;
if (grid.SelectedIndex >= 0)
 {
   for (int i = 0; i <= grid.SelectedItems.Count; i++)
   {
      grid.Items.Remove(grid.SelectedItems[i]);
   };
 }

Works fine on removing only the item selected just like CurrentItem but it doesn't remove anymore than 2 selected items!

The DataGrid I have should at least contain a minimum of 100 items. I've added a remove all option but this is also necessary.

I'll be thankful if anyone gives me the solution.

Solution 1

By removing selected item you are changing SelectedItems collection. You should copy it first and then start removing.

Solution 2

This also worked well for me.

while (dataGrid1.SelectedItems.Count > 0){
  dataGrid1_item_source.Rows.RemoveAt(dataGrid1.SelectedIndex);
}

Solution 3

The mistake you are doing here you are removing items during loop whaich is messing with loop count so make a copy grid and remove selecteditem from it and then equlize it by the orignal one.. Check this out

var grid = dataGrid1;
var mygrid = dataGrid1
if (grid.SelectedIndex >= 0)
{
  for (int i = 0; i <= grid.SelectedItems.Count; i++)
  {
    mygrid .Items.Remove(grid.SelectedItems[i]);  
   };
}

grid = mygrid;

Comments

[Schahriar SaffarShargh]

Tnx! I copied SelectedItem object into a new object and added to the loop.

[Rick Sladkey]

This does nothing because grid and mygrid are the same DataGrid.

[Doug]

If you sorted the DataGrid, his does not work because the indices are different than the underlying item source. Also, it would be dataGrid1_item_source.RemoveAt(dataGrid1.SelectedIndex); Rows is not in an ObservableCollection.

[Alexander]

While this code may answer the question, providing additional context regarding how and why it solves the problem would improve the answer's long-term value.