using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Collections;


	/// <summary>
	/// Summary description for ProfileList.
	/// Technilogies used: ListBox, DataGrid, Session, ArrayList. DataTable
	/// </summary>

public class ProfileList : Page
{
	public Label debugMessage;
	public DataGrid matchedList;
	public ListBox RoleList, ProgramList;
	DataTable tableValues;

	public ProfileList()
	{
		//
		// TODO: Add constructor logic here
		//
	}
	public void Page_Load(Object Src, EventArgs E)
	{
		if(!IsPostBack)
		{
			matchedList.DataSource = GetDataView("");
			matchedList.DataBind();
		}
	}

	DataTable GetDataTable()
	{
		tableValues = (DataTable)Session["tableValues"];
		if(tableValues != null)
			return tableValues;
		else
			return null;

	}

	void AddToTable(string role, string program)
	{
		DataTable data = GetDataTable();
		if(data == null)
		{
			//first time, no data in the data table
			data = new DataTable();
			DataColumn prim = data.Columns.Add("EmpNo", typeof(int));
			prim.AutoIncrement=true;
			prim.AutoIncrementSeed=1;
			prim.AutoIncrementStep=2;
			data.Columns.Add("FirstNme", typeof(string));
			data.Columns.Add("LastName", typeof(string));
			data.PrimaryKey = new DataColumn[] {data.Columns["EmpNo"]}; //Need set primary key for Find later
		}
		DataRow dr;
		dr = data.NewRow();
		dr[1] = role;
		dr[2] = program;
		data.Rows.Add(dr);

		Session["tableValues"] = data;

		matchedList.DataSource = GetDataView("");
		matchedList.DataBind();
		//debugMessage.Text = debugMessage.Text + " " + role+program;

	}
	DataView GetDataView(string sortString)
	{
		if(GetDataTable() == null)
			return null;

		DataView view = new DataView(GetDataTable());
		view.Sort = sortString;		//problem: sort lost in new pages
		return view;
	}

	public void SortDataGrid(object o, DataGridSortCommandEventArgs e)
	{
		matchedList.DataSource = GetDataView(e.SortExpression);
		matchedList.DataBind();
	}

	public void PageChange(object sender, DataGridPageChangedEventArgs e)
	{
		matchedList.CurrentPageIndex = e.NewPageIndex;
		matchedList.DataSource = GetDataView("");
		matchedList.DataBind();
	}
	public void OnClickBtn_Add(object sender, EventArgs e)
	{
		string new_role="";
		string new_program="";
		//two kind of for loops
		for (int i=0; i<RoleList.Items.Count; i++)
		{
             if (RoleList.Items[i].Selected)
                new_role =RoleList.Items[i].Text;
        }
		foreach (ListItem item  in ProgramList.Items)
		{
			if (item.Selected)
			{
				new_program  = item.Text;
				AddToTable(new_role, new_program);
			}
		}
	}
	public void RemoveSelected(object sender, EventArgs e)
	{
		debugMessage.Text="";
		ArrayList deletedRowList = new ArrayList();
		DataTable data = GetDataTable();
		if  (data==null)
			return;  //something relay wrong!

		foreach(DataGridItem item in matchedList.Items)
		{
			// find checkBox in DataGrid control.
			CheckBox selection = (CheckBox)item.FindControl("SelectProfile");
			//CheckBox selection =(CheckBox) item.Cells[3].Controls[1]; //OK

			if (selection != null)	//found checkbox
			{
				//debugMessage.Text += "<br>checkbox found " + item.Cells[3].UniqueID ;
				//debugMessage.Text += "<br>checkbox status is " + selection.Checked;
				if (selection.Checked)	//remove table row
				{
					//debugMessage.Text += "<br>delete Item is - " + item.Cells[1].Text ;
					DataRow rmRow = data.Rows.Find(item.Cells[0].Text);
					deletedRowList.Add(rmRow);
					//debugMessage.Text += "remove row "+ rmRow["EmpNo"];
				}
			}
		}
		foreach(DataRow rmRow in deletedRowList)
		{
			data.Rows.Remove(rmRow);
		}
		Session["tableValues"] = data;
		matchedList.DataSource = GetDataView("");
		matchedList.CurrentPageIndex=0;
		
		matchedList.DataBind();
	}
}