If OnRowClick method is used then filling of Grid's rows from oledb provider using dataset does not work.
When debugging then after code:
Grid1.SetDataSource(ds.Tables[0]);
Grid1.DataBind();
following watches return:
Grid1.DefaultTable.Rows[0]["Leading"].Value = ""
ds.Tables[0].Rows[0]["Leading"].ToString() = "AAA"
If the same code is called by other method then OnRowClick then those 2 values are equal.