browsephoto.aspx.cs

这个是网上相册系统的一个架构设计说明

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 Utils;
using Model;

namespace AlbumOL
{
	/// <summary>
	/// BrowsePhoto 的摘要说明。
	/// </summary>
	public class BrowsePhoto : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label lbAlias;
		protected System.Web.UI.WebControls.Panel pWelcome;
		protected System.Web.UI.WebControls.Panel pCategory;
		protected System.Web.UI.WebControls.Label lbCatName;
		protected System.Web.UI.WebControls.Button btnUpdate;
		protected System.Web.UI.WebControls.Button btnDel;
		protected System.Web.UI.WebControls.Panel pCategoryEdit;
		protected System.Web.UI.WebControls.TextBox tbCatName;
		protected System.Web.UI.WebControls.Button btnOK;
		protected System.Web.UI.WebControls.Button btnCancel;
		protected System.Web.UI.WebControls.DataList dlPhoto;
		protected System.Web.UI.WebControls.Panel p1;
		protected System.Web.UI.WebControls.Button btnAddPhoto;
	
		private string _catName;

		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			WebUtils.CheckUser();
			lbAlias.Text = (User as MyPrincipal).Name;
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.btnUpdate.Click += new System.EventHandler(this.btnUpdate_Click);
			this.btnDel.Click += new System.EventHandler(this.btnDel_Click);
			this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
			this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
			this.btnAddPhoto.Click += new System.EventHandler(this.btnAddPhoto_Click);
			this.Load += new System.EventHandler(this.Page_Load);
			this.PreRender += new System.EventHandler(this.BrowsePhoto_PreRender);

		}
		#endregion

		private void BrowsePhoto_PreRender(object sender, System.EventArgs e)
		{
			int idCat = Int32.Parse(Request.Params["cat"]);
			IModel model = new CategoryModel();
			DSPhoto ds = model.LoadByPrimaryKey(idCat) as DSPhoto;
			PhotoModel modelPhoto = new PhotoModel(ds);
			modelPhoto.LoadByCategory(ds.Category.FindByCategoryID(idCat));
			if(ds.Tables["Category"].Rows.Count > 0)
			{
				_catName = ds.Tables["Category"].Rows[0]["CategoryName"].ToString();
			}

			if(ds.Tables["Photo"].Select("CategoryID="+idCat).Length > 0)
			{
				btnDel.Enabled = false;
			}
			else
			{
				btnDel.Enabled = true;
			}

			dlPhoto.DataSource = ds.Tables["Photo"];
			this.DataBind();
			
		}

		private void btnUpdate_Click(object sender, System.EventArgs e)
		{
			this.pCategoryEdit.Visible = true;
			this.pCategory.Visible = false;
		}

		private void btnOK_Click(object sender, System.EventArgs e)
		{
			if(this.tbCatName.Text.Trim().Length>0)
			{
				int idCat = Int32.Parse(Request.Params["cat"]);
				Model.Model model = new CategoryModel();
				model.LoadByPrimaryKey(idCat);
				DSPhoto ds = model.DataSet as DSPhoto;
				ds.Category.FindByCategoryID(idCat).CategoryName = tbCatName.Text.Trim();
				model.Save(ds);
			}
			this.pCategoryEdit.Visible = false;
			this.pCategory.Visible = true;
		}

		private void btnDel_Click(object sender, System.EventArgs e)
		{
			int idCat = Int32.Parse(Request.Params["cat"]);
			Model.Model model = new CategoryModel();
			model.LoadByPrimaryKey(idCat);
			DSPhoto ds = model.DataSet as DSPhoto;
			ds.Category.FindByCategoryID(idCat).Delete();
			model.Save(ds);
			this.Response.Redirect("ListCategories.aspx", true);
		}

		private void btnCancel_Click(object sender, System.EventArgs e)
		{
			this.pCategoryEdit.Visible = false;
			this.pCategory.Visible = true;
		}

		private void btnAddPhoto_Click(object sender, System.EventArgs e)
		{
			int idCat = Int32.Parse(Request.Params["cat"]);
			Response.Redirect("ViewPhoto.aspx?photo=-1&cat=" + idCat, true);
		}

		public string CategoryName
		{
			get
			{
				return _catName;
			}
		}
	}
}