DHTMLX Docs & Samples Explorer

BeforeOutput

The BeforeOutput event occurs after data has been selected from the database and ready to be sent to client side

      connector.BeforeOutput += new EventHandler<RenderEventArgs>(connector_BeforeOutput);

Event passes reference to XmlWriter object that is currently used for rendering response. Most common use-case of this event - header structure for the grid.

	void connector_BeforeOutput(object sender, RenderEventArgs e)
        {
            e.Writer.WriteStartElement("head");
            {
                //col 1
                e.Writer.WriteStartElement("column");
                {
                    e.Writer.WriteAttributeString("width", "50");
                    e.Writer.WriteAttributeString("type", "ed");
                    e.Writer.WriteAttributeString("align", "right");
                    e.Writer.WriteAttributeString("color", "white");
                    e.Writer.WriteAttributeString("sort", "na");
                    e.Writer.WriteString("Sales");
                }
                e.Writer.WriteEndElement();
            }
            //...............
        }

In case of dyn. loading mode, one more check need to be added, to prevent data output for additional data calls.

        void connector_BeforeOutput(object sender, RenderEventArgs e)
        {
            if (this.Connector.Request.StartIndex == 0)
            {
                e.Writer.WriteStartElement("head");
                //..........
            }
        }