I have solved my problem two days ago. I've used this:
int callID = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "CagriID"));
All the event:
protected void gvListele_RowDataBound(object sender, GridViewRowEventArgs e)
{
dbeDataContext db = new dbeDataContext();
var c = (from v in db.CAGRIs where v.UserID != Convert.ToInt32(Session["user"]) select v).ToArray();
if (c != null)
{
foreach (var item in c)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
int callID = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "CagriID"));
if (callID == item.CagriID)
{
e.Row.Enabled = false;
continue;
}
}
}
}
}