Question

Basically I’m using the ItemSource property of the datagrid to bind a generic list to my datagrid. However I’d really like to change the headings, I tried the following but I get a runtime exception:

dgtest.Columns[1].Header = "edited";

Answer 1

You can change it on the ItemDataBound event:

public void yourDataGrid_OnItemDataBound(object s, DataGridItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Header)
    {
        // Change the cell index to the column index you want... I just used 0
        e.Item.Cells[0].Text = "Text you want in header.";
    }
}

If the grid is already bound you should be able to do:

yourDataGrid.Columns[0].Header = "Text you want in header.";

You are probably getting an error because you are trying to change the text before it is bound.