using System;
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.Data.SqlClient;
using System.Configuration;
using System.Xml;

namespace Example_8_7
{
	/// <summary>
	/// Summary description for DataSetToXML.
	/// </summary>
	public class DataSetToXML : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label SQLLabel;
		private readonly string SQLCONNECTIONSTRING = ConfigurationSettings.AppSettings["SQLCONNECTIONSTRING"].ToString();
		protected System.Web.UI.WebControls.TextBox XMLResultLabel;

		private static DataSet ds = new DataSet();

		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!Page.IsPostBack)
			{
//				GetDataSet();

				///創建XML文件
				CreateXMLFile();
			}
		}

		private void CreateXMLFile()
		{				
			DataSet ds = GetDataSet();
			XMLResultLabel.Text = ds.GetXml();

			///
			
		}

		private DataSet GetDataSet()
		{
			///從數據庫中獲取表記錄
			String cmdText = "SELECT Staff.Staff_ID,Staff.Staff_Name FROM Staff "
				+ "INNER JOIN StaffRole ON Staff.Staff_ID = StaffRole.Staff_ID "
				+ "INNER JOIN Role ON Role.Role_ID = StaffRole.Role_ID";		
			SqlConnection myConnection = new SqlConnection(SQLCONNECTIONSTRING);
			SqlDataAdapter da = new SqlDataAdapter(cmdText,myConnection);

			///執行數據庫查詢
			myConnection.Open();
			DataSet ds = new DataSet();
			da.Fill(ds,"Staffs");
			myConnection.Close();

			SQLLabel.Text = cmdText;
			return(ds);
		}

		#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
	}
}