Question

I have a WPF DataGrid. The users can edit the data in cell. I want a event in that I want to check if cell is empty. User can empty the data by using Del Backspace Cut options etc.

Give me a event and event handler to do that. I already tries OnCellEditEnding event but this will trigger only if edit is finished. I want to check cell is empty dynamically each time when user inputs.

Answer 1

each datagridcell has a textbox as its content when it is in the edit mode. you can check the text Length written in that textbox whenever a key is down (by handling onKeyDown or onPreviewKeyDown event)

edit:

use PreparingCellForEdit event, sth like this:

void MainDataGrid_PreparingCellForEdit(object sender, DataGridPreparingCellForEditEventArgs e)
{
   TextBox tb = e.Column.GetCellContent(e.Row) as TextBox;
   tb.TextChanged+=new TextChangedEventHandler(tb_TextChanged); 
}

void tb_TextChanged(object sender, TextChangedEventArgs e)
{
   //here, something changed the cell's text. you can do what is neccesary
}