using System;
using System.Xml;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Diagnostics;
using MCSCommon.Tools;

namespace GridTest
{
	/// <summary>
	/// Summary description for WebForm1.
	/// </summary>
	public class XmlRequest : MCSCommon.BasePage.XMLRequestWebPage
	{
		private void Page_Load(object sender, System.EventArgs e)
		{
			string strFilePath = Request.MapPath("./Xml/DataSet.xml");

			DataSet ds = new DataSet();

			ds.ReadXml(strFilePath, XmlReadMode.Auto);

			DataSet dsResult = new DataSet();
			DataView dv = new DataView(ds.Tables[0]);

			if (ParamsCount >= 4)
				dv.Sort = ParamValue(2) + " " + ParamValue(3);

			dsResult.ReadXml(strFilePath, XmlReadMode.ReadSchema);

			int nPage = int.Parse(ParamValue(0));
			int nCount = int.Parse(ParamValue(1));
			int nStart = (nPage - 1) * nCount;

			nCount = Math.Min(dv.Count - nStart, nCount);

			CopyDataSetByView(dsResult.Tables[0], dv, nStart, nCount);
			XMLHelper.GetXmlDoc(_XmlResult, dsResult);

			_XmlResult.DocumentElement.SetAttribute("totalCount", dv.Count.ToString());
		}

		private void CopyDataSetByView(DataTable table, DataView dvSrc, int nStart, int nCount)
		{
			for (int i = 0; i < nCount; i++)
			{
				DataRowView drv = dvSrc[nStart + i];
				DataRow row = drv.Row;

				DataRow newRow = table.NewRow();

				foreach(DataColumn dc in row.Table.Columns)
				{
					newRow[dc.ColumnName] = row[dc.ColumnName];
				}

				table.Rows.Add(newRow);
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);
		}
		#endregion
	}
}