using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

namespace ASPNetCustomStockQuotes.STEIStockQuotes
{

    /// <summary>
    /// Summary description for StockQuoteGridView
    /// </summary>
    public class StockQuoteGridView : WebPart
    {
        private GridView gvStockQuotes = null;
        YahooQuotes.YahooStockQuotes yahooStockQuoteQuery = null;
        DataSet yahooStockQuoteDataSet = null;

        protected override void CreateChildControls()
        {
            BoundField gridColumn;

            //clear the controls collection
            Controls.Clear();

            //create and configure GridView control
            gvStockQuotes = new GridView();
            gvStockQuotes.AutoGenerateColumns = false;
            gvStockQuotes.CssClass = "listing";
            gvStockQuotes.EmptyDataText = "Cannot obtain stock quotes at this time. Please try again later.";
            gvStockQuotes.HeaderStyle.HorizontalAlign = HorizontalAlign.Center;

            //create columns
            gridColumn = new BoundField();
            gridColumn.DataField = "Symbol";
            gridColumn.HeaderText = "Symbol";
            gridColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Left;
            gvStockQuotes.Columns.Add(gridColumn);

            gridColumn = new BoundField();
            gridColumn.DataField = "Last_Traded_Price";
            gridColumn.HeaderText = "Last Traded Price";
            gridColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Right;
            gvStockQuotes.Columns.Add(gridColumn);

            gridColumn = new BoundField();
            gridColumn.DataField = "Last_Traded_Date";
            gridColumn.HeaderText = "Last Traded Date";
            gridColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
            gvStockQuotes.Columns.Add(gridColumn);

            gridColumn = new BoundField();
            gridColumn.DataField = "Last_Traded_Time";
            gridColumn.HeaderText = "Last Traded Time";
            gridColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
            gvStockQuotes.Columns.Add(gridColumn);

            gridColumn = new BoundField();
            gridColumn.DataField = "Change";
            gridColumn.HeaderText = "Change";
            gridColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Right;
            gvStockQuotes.Columns.Add(gridColumn);

            //add GridView control to custom web part controls
            this.Controls.Add(gvStockQuotes);

            //create instances of custom Yahoo! query web service and DataSet control
            yahooStockQuoteQuery = new YahooQuotes.YahooStockQuotes();
            yahooStockQuoteDataSet = new DataSet();

            //attempt to query Yahoo! for stock quote data, load it into DataSet control, and bind to GridView control;
            try
            {
                yahooStockQuoteDataSet = yahooStockQuoteQuery.GetStockQuotes();

                gvStockQuotes.DataSource = yahooStockQuoteDataSet;
                gvStockQuotes.DataBind();
            }
            catch (Exception yqExc)
            {
                gvStockQuotes.EmptyDataText = yqExc.Message.ToString();
            }
        }
    }

}