Question

After loading my data into a DataGrid using WPF:

    dataGrid1.DataContext = db.Select_Drawing_Numbers();
    dataGrid1.Columns[0].Width = 10;

But I get an error:

    Index is out of range. Please select a non-zero, non-negative integer.

How can I make sure the data is bound before calling Columns[0]?

Answer 1

Try hooking into the Loaded event of the DataGrid. The issue you are having is that the DataGrid doesn’t actually have any values loaded into it (and therefore has no columns/rows) until it is Loaded.