首先:定义连接字符串,定义SQL语句,定义连接 如下:
string strConn;
string strSQL;
SqlConnection sqlConn;
其次:初始化连接字符串,创建连接
strConn = ((NameValueCollection)Context.GetConfig("appSettings"))["ConnectString"].ToString();
sqlConn = new SqlConnection(strConn);
再之:新建命令对象并初始化连接
SqlCommand sqlComm = new SqlCommand();
sqlComm.Connection = sqlConn;
最后:初始化SQL语句,赋值命令SQL,增加参数并给值,打开执行关闭!
strSQL="UPDATE tOrderDetail SET MQuantity=@PQuantity WHERE MOrderID=@POrderID AND MIndex=@PIndex";
sqlComm.CommandText = strSQL;
sqlComm.Parameters.Add(new SqlParameter("@PQuantity", SqlDbType.Int));
sqlComm.Parameters.Add(new SqlParameter("@POrderID", SqlDbType.Int));
sqlComm.Parameters.Add(new SqlParameter("@PIndex", SqlDbType.Int));
sqlComm.Parameters["@PQuantity"].Value = int.Parse(((TextBox)e.Item.Cells[2].Controls[0]).Text);
sqlComm.Parameters["@POrderID"].Value = txbOrderID.Text;
sqlComm.Parameters["@PIndex"].Value = dgOrderItem.DataKeys[(int)e.Item.ItemIndex];
sqlComm.Connection.Open();
sqlComm.ExecuteNonQuery();
sqlComm.Connection.Close();