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 Microsoft.Web.UI.WebControls;
using DocAdmin.BLL ;
using DocAdmin.COMMON ;

namespace DocAdmin.USL
{
	/// <summary>
	/// Values_Admin 的摘要說明。
	/// </summary>
	public class Values_Admin : System.Web.UI.Page
	{
		#region 控件和變量
		protected System.Web.UI.WebControls.Button b_Add;
		protected System.Web.UI.WebControls.Button b_Modify;
		protected System.Web.UI.WebControls.Button b_Delete;
		protected System.Web.UI.WebControls.Button b_NewValue;
		protected System.Web.UI.WebControls.Button b_DelValue;
		protected Microsoft.Web.UI.WebControls.TreeView tree_list;
		protected System.Web.UI.WebControls.DataGrid dg;
		protected System.Web.UI.HtmlControls.HtmlInputHidden h_ValueName;
		protected System.Web.UI.HtmlControls.HtmlInputHidden h_ValueType;
		protected System.Web.UI.HtmlControls.HtmlInputHidden RECID;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label4;
		protected System.Web.UI.WebControls.Label Label6;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.Label Label1;
		private DataTable dtValue = null ;
		#endregion
	
		#region Page_Load
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此處放置用戶代碼以初始化頁面
			//未登錄、重定向到登錄頁面

			//從Session中取dtValue
			dtValue = (DataTable)Session["dtValue"] ;
			//若dtValue為空，創建它
			if(dtValue == null)
			{
				dtValue = new DataTable() ;
			}

			//為刪除下拉框按鈕添加確認對話框
			CommHandler.AddConfirm(this.b_DelValue,"確認要刪除此下拉框？") ;
			CommHandler.AddConfirm(this.b_Delete,"確認要刪除此下拉選項？") ;
			if( !IsPostBack )
			{
				//初始化數據
				InitData() ;
			}

			//綁定表格
			BindGrid() ;
		}

		/// <summary>
		/// 為表格綁定數據源
		/// </summary>
		private void BindGrid()
		{
			//如果dtValue為空，創建它
			if(dtValue == null)
			{
				dtValue = new DataTable() ;
			}

			//為表格綁定數據源
			dg.DataSource = dtValue ;
			dg.DataBind() ;
		}

		/// <summary>
		/// 初始化界面
		/// </summary>
		private void InitData()
		{
			//初始化樹
			InitTree() ;

			//默認顯示第一個節點的數據
			InitDtFromTree("0") ;
			
		}

		/// <summary>
		/// 初始化樹
		/// </summary>
		private void InitTree()
		{
			//初始化前，先清空樹原來的節點
			tree_list.Nodes.Clear();

			//樹的數據源
			DataTable dt = new DataTable() ;
			
			//調用ValueInfo的查詢所有下來框信息的方法
			dt = ValueInfo.GetAllValue() ;
			
			for(int i=0;i<dt.Rows.Count;i++)
			{
				TreeNode node = null;

				string nodeText = dt.Rows[i]["VALUENAME"].ToString();
				string nodeID = dt.Rows[i]["VALUETYPE"].ToString();
				//新建節點
				if(node == null || node.Text != nodeText)
				{
					node = new TreeNode();
					node.ID = nodeID;
					node.NodeData = "";
					node.Text = nodeText;
					tree_list.Nodes.Add(node);
				}

				//初始時，樹的選中節點置為空
				tree_list.SelectedNodeIndex = null ;				
			}
		}
		#endregion

		#region Web 窗體設計器生成的代碼
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.tree_list.SelectedIndexChange += new Microsoft.Web.UI.WebControls.SelectEventHandler(this.tree_list_SelectedIndexChange);
			this.dg.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dg_ItemCommand);
			this.b_Add.Click += new System.EventHandler(this.b_Add_Click);
			this.b_Modify.Click += new System.EventHandler(this.b_Modify_Click);
			this.b_Delete.Click += new System.EventHandler(this.b_Delete_Click);
			this.b_NewValue.Click += new System.EventHandler(this.b_NewValue_Click);
			this.b_DelValue.Click += new System.EventHandler(this.b_DelValue_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		#region 添加下拉選項
		private void b_Add_Click(object sender, System.EventArgs e)
		{
			//取下拉框類型和名稱
			string type = this.h_ValueType.Value ;
			string name = this.h_ValueName.Value ;

			//頁面轉向到添加下拉框頁面
			string url = ".\\Values_Add.aspx?OPTTYPE=NewItem&VALUETYPE="+type+"&VALUENAME="+name ;
			this.Page.Response.Redirect(url) ;
		}
		#endregion

		#region 修改下拉選項
		private void b_Modify_Click(object sender, System.EventArgs e)
		{
			//獲取待修改的下拉選項的序列號
			string recid = RECID.Value.Trim() ;

			if(recid == "")
			{
				//待修改的序列號為空，提示，返回
				CommHandler.Alert(Page,"請在表格中選擇要修改的下拉選項！") ;
				return ;
			}

			//頁面重定向到修改下來選項頁面
			string url = ".\\Values_Edit.aspx?OPTTYPE=Modify&RECID="+recid ;
			this.Page.Response.Redirect(url) ;		
		}
		#endregion

		#region 刪除下拉選項
		private void b_Delete_Click(object sender, System.EventArgs e)
		{
			//獲取待修改的下拉選項的序列號
			string recid = RECID.Value.Trim() ;

			if(recid == "")
			{
				//待刪除的序列號為空，提示，返回
				CommHandler.Alert(Page,"請在表格中選擇要刪除的下拉選項！") ;
				return ;
			}

			//刪除下拉選項操作
			int i = ValueInfo.DeleteValue(recid) ;
			
			//刪除成功
			if(i > 0)
			{
				//提示
				CommHandler.Alert(Page,"下拉選項刪除成功！") ;

				//清空隱藏文本框
				RECID.Value = "" ;
			}
		
		}
		#endregion

		#region 表格的選中事件
		private void dg_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int row = e.Item.ItemIndex ;

			RECID.Value = dtValue.Rows[row]["RECID"].ToString() ;		
		}
		#endregion

		#region 新加下拉框
		private void b_NewValue_Click(object sender, System.EventArgs e)
		{
			//頁面轉向到添加下拉框頁面
			//TYPE為新建下拉框
			string url = ".\\Values_Add.aspx?OPTTYPE=NewType" ;
			this.Page.Response.Redirect(url) ;		
		}
		#endregion

		#region 刪除下拉框
		private void b_DelValue_Click(object sender, System.EventArgs e)
		{
			//獲取待刪除的下拉框的ValueType
			string valuetype = h_ValueType.Value.Trim() ;
			string valuename = h_ValueName.Value.Trim() ;

			//如果ValueType為空，提示，返回
			if(valuetype == "")
			{
				CommHandler.Alert (Page,"請在左側下拉框中選擇要刪除的下拉框！") ;
				return ;
			}

			//刪除操作
			int i = ValueInfo.DeleteValue_Type(valuetype) ;
			
			//刪除成功
			if(i > 0)
			{
				//提示
				CommHandler.Alert(Page,"下拉框["+valuename+"]刪除成功！") ;

				//清空隱藏文本框
				h_ValueType.Value = "" ;
				h_ValueName.Value = "" ;
			}		
		}
		#endregion

		#region 樹的選中事件
		private void tree_list_SelectedIndexChange(object sender, Microsoft.Web.UI.WebControls.TreeViewSelectEventArgs e)
		{
			//獲取選擇的節點
			string index = "e.NewNode" ;
			//初始化表格
			InitDtFromTree(index) ;
				
		}

		/// <summary>
		/// 根據樹的選中節點初始化表格
		/// </summary>
		/// <param name="index">節點序號</param>
		private void InitDtFromTree(string index)
		{
			TreeNode tn = tree_list.GetNodeFromIndex(index) ;

			string type = tn.ID ;
			string name = tn.Text ;

			//顯示節點內容
			this.h_ValueType.Value = type ;
			this.h_ValueName.Value = name ;

			//查詢選中的下拉框
			Search(type) ;	
		}

		/// <summary>
		/// 查詢指定TYPE的所有下拉框值
		/// </summary>
		/// <param name="type">TYPE</param>
		private void Search(string type)
		{
			//調用ValueInfo的查詢函數
			dtValue = ValueInfo.GetValue(type) ;

			Session["dtValue"] = dtValue ;

			//綁定表格
			BindGrid() ;
		}
		#endregion
		
	}
}