edit.ascx.cs

投票系统模块设计

namespace book07.Controls
{
	using System;
	using System.Data;
	using System.Drawing;
	using System.Web;
	using System.Web.UI.WebControls;
	using System.Web.UI.HtmlControls;
	using System.Web.Security;
	using System.Web.SessionState;
	using Business;
	using Common;

	/// <summary>
	///		Edit 的摘要说明。
	/// </summary>
	public class Edit : System.Web.UI.UserControl
	{
		protected System.Web.UI.WebControls.TextBox tbTitle;
		protected System.Web.UI.WebControls.TextBox tbContent;
		protected System.Web.UI.WebControls.LinkButton lbSubmit;
		protected System.Web.UI.WebControls.LinkButton lbReset;

		private void Page_Load(object sender, System.EventArgs e)
		{
			// 加载修改文章内容
			if (!IsPostBack)
			{
				// 将文章信息数据集存入Session
				ArticleData = Forum.GetOneArticle(ArticleID);

				//加载被修改文章内容
				ReloadArticle();
			}
		}


		#region Properties

		/// <summary>
		/// 标题
		/// </summary>
		public string Title
		{
			get
			{
				return tbTitle.Text;
			}
			set
			{
				tbTitle.Text = value;
			}
		}

		/// <summary>
		/// 文章内容
		/// </summary>
		public string Content
		{
			get
			{
				return tbContent.Text;
			}
			set
			{
				tbContent.Text = value;
			}
		}

		private DataSet _article_data;
		/// <summary>
		/// 将要回复的文章信息数据
		/// </summary>
		public DataSet ArticleData
		{
			get
			{
				if (_article_data == null)
				{
					_article_data = (DataSet)Session["dsArticle"];
				}
				return _article_data;
			}
			set
			{
				Session["dsArticle"] = value;
			}
		}

		/// <summary>
		/// 回复的文章id
		/// </summary>
		public int ArticleID
		{
			get
			{
				return Convert.ToInt32(Request.QueryString["id"]);
			}
		}

		/// <summary>
		/// 当前用户名
		/// </summary>
		public string Username
		{
			get
			{
				return HttpContext.Current.User.Identity.Name;
			}
		}

		private Article _art;
		/// <summary>
		/// 当前撰写的文章信息
		/// </summary>
		public Article PageArticle
		{
			get
			{
				if (_art == null)
					_art = new Article();
				_art.title = Title;
				_art.content = Content;
				_art.id = ArticleID;
				_art.author_id = (int)ArticleData.Tables[0].Rows[0]["author_id"];
				return _art;
			}
		}

		#endregion

		#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.lbSubmit.Click += new System.EventHandler(this.lbSubmit_Click);
			this.lbReset.Click += new System.EventHandler(this.lbReset_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void lbSubmit_Click(object sender, System.EventArgs e)
		{
			if (Forum.EditArticle(PageArticle, Username))
			{
				Response.Redirect("~/ShowArticle.aspx?id=" + ArticleID.ToString());
			}
			else
			{
				Response.Write("<script>alert('修改文章时发生错误，或者您没有足够的权限！')</script>");
			}
		}

		private void lbReset_Click(object sender, System.EventArgs e)
		{
			ReloadArticle();
		}

		/// <summary>
		/// 加载被回复文章内容
		/// </summary>
		private void ReloadArticle()
		{
			Title = ArticleData.Tables[0].Rows[0]["title"].ToString();
			Content = ArticleData.Tables[0].Rows[0]["content"].ToString();
		}

	}
}