Button inside the Datagrid not getting Fired due to PreviewMouseLeftButtonDown

Question

I am working on a WPF application.

As per requirement I want to show list of item in data grid. Each row also having a “DELETE” button, using this button we can de

Answer 1

Move the DragDrop.DoDragDrop call to the datagrid's MouseMove event:

private void dgEmployee_MouseMove(object sender, MouseEventArgs e)
    {
        if(e.LeftButton == MouseButtonState.Pressed)
        {
            Employee selectedEmp = dgEmployee.Items[prevRowIndex] as Employee;
            if (selectedEmp == null)
                return;

            DragDropEffects dragdropeffects = DragDropEffects.Move;
            if (DragDrop.DoDragDrop(dgEmployee, selectedEmp, dragdropeffects)
                            != DragDropEffects.None)
            {
                //Now This Item will be dropped at new location and so the new Selected Item
                dgEmployee.SelectedItem = selectedEmp;
            }
        }
    }

The updated PreviewMouseLeftButtonDown handler:

void dgEmployee_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        prevRowIndex = GetDataGridItemCurrentRowIndex(e.GetPosition);

        if (prevRowIndex < 0)
            return;

        dgEmployee.SelectedIndex = prevRowIndex;
    }

Not only does it fix your problem but it provides a better user experience. The drag should be initiated when I move the mouse instead of when I press the row.

Next time please link the tutorial that you are using - it will make it much easier for others to reproduce the issue that you are encountering.