Question

I am working on a C# project, and I have a DataGridview in which I am adding dynamically a new column with the following code.

DataGridViewColumn cl = new DataGridViewColumn();
cl.HeaderText = "Numbering";
grdCrew.Columns.Add(cl);

I want on every new row to put a number which is actually the number of the row, but i want to automatically assign the number.

Answer 1

Try this :

dataGridView1["ColumnName",rowIndex].DefaultNewRowValue = dt.Rows.Count;

Update :
Also you can use these codes :

adapter.Fill(dt);
        dt.Columns["ColumnName"].DefaultValue = dt.Rows.Count;