bookmanage.aspx.cs

ASP。NET免费毕业论文设计：ASP[1].NET网络书店(C_,全源码提供) 采用C#语言编写

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 Hugo;

namespace BookShop
{
	/// <summary>
	/// BookManage 的摘要说明。
	/// </summary>
	public class BookManage : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.HyperLink HyperLink1;
		protected System.Web.UI.WebControls.HyperLink HyperLink2;
		protected System.Web.UI.WebControls.HyperLink HyperLink3;
		protected System.Web.UI.WebControls.DataGrid dg_Book;
		protected System.Web.UI.WebControls.Literal ErrorMsg;

		Hugo.Book MyBook=new Book();
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			if (!(this.IsPostBack))
			{
				try
				{
					ViewState["Sort"]="";
					ViewState["Page"]="1";
					GridBind();
				}
				catch (Exception er)
				{
					ShowErrMsg(er.Message);
				}
				ErrorMsg.Visible =false;
			}	

		}

		private void GridBind()
		{
			DataView MyDv;
			MyDv=MyBook.GetBook();
			if(!object.Equals(ViewState["Sort"],null))
				MyDv.Sort =ViewState["Sort"].ToString() ;
			dg_Book.DataSource =MyDv;
			if(!object.Equals(ViewState["Page"],null))
				dg_Book.CurrentPageIndex  =int.Parse(ViewState["Page"].ToString()) ;
			try
			{
				dg_Book.DataBind();
			}
			catch
			{
				dg_Book.CurrentPageIndex =dg_Book.PageCount -1;
				dg_Book.DataBind ();
			}

		}
		#region Web Form Designer generated code
		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.dg_Book.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.dg_Book_ItemCreated);
			this.dg_Book.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.dg_Book_PageIndexChanged);
			this.dg_Book.SortCommand += new System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.dg_Book_SortCommand);
			this.dg_Book.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dg_Book_DeleteCommand);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void dg_Book_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
		{
			System.Web.UI.WebControls.Image    TempImg;
			TempImg=(System.Web.UI.WebControls.Image)e.Item.FindControl("ib_delete") ;
			
			if(object.Equals(TempImg,null)==false)
			{				
				TempImg.Attributes.Add("onClick","javascript:return confirm('你能确定要删除此书籍类型吗？')"); 
			}
		}

		private void dg_Book_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int BookId;
			try
			{
				BookId=int.Parse(e.Item.Cells[0].Text.Trim());
				MyBook.DeleteBookById(BookId);
				GridBind();

			}	 
			catch(Exception er)
			{
             ShowErrMsg(er.Message)   ;
			}

		}
		private void ShowErrMsg(string err)
		{
			string str;
			str="<script language='javascript'>";
			str+=" alert('" +err + "')";
			str+="</script>";
			ErrorMsg.Visible=true;
			ErrorMsg.Text=str;
				
		}

		private void dg_Book_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			ViewState["Page"]=e.NewPageIndex.ToString();
			GridBind();
		}

		private void dg_Book_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
		{
			if (ViewState["Sort"].ToString()==e.SortExpression)
				ViewState["Sort"]=e.SortExpression + " desc";
			else
			    ViewState["Sort"]=e.SortExpression ;
			GridBind();
		}
	}
}