C# sql 批量插入数据库的语句

　　　　 //执行DataTable数据导入
        public static int UpdateDt(string strConn, DataTable dt)
        {
            try
            {
                string tablaName = dt.TableName;
                string strSQL = string.Format(" Select * From {0} Where 1=2 ", tablaName);
                int obj = 0;
                using (SqlConnection con = GetConnection(strConn))
                {
                    using (SqlDataAdapter adp = new SqlDataAdapter(strSQL, con))
                    {
                        using (SqlCommandBuilder cmd = new SqlCommandBuilder(adp))
                        {
                            if (con.State != ConnectionState.Open) con.Open();
                            obj = adp.Update(dt.GetChanges());
                            dt.AcceptChanges();
                            if (con.State != ConnectionState.Closed) con.Close();
                        }
                    }
                }
                return obj;
            }
            catch (Exception ex)
            {
                return -1;
            }
        }