lackbook.aspx.cs

一个简单的书城代码

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;

namespace BookShop
{
	/// <summary>
	/// LackBook 的摘要说明。
	/// </summary>
	public class LackBook : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator6;
		protected System.Web.UI.WebControls.Label Label5;
		protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator3;
		protected System.Web.UI.WebControls.Label Label4;
		protected System.Web.UI.WebControls.TextBox txtName;
		protected System.Web.UI.WebControls.TextBox txtPublisher;
		protected System.Web.UI.WebControls.ImageButton btnAdd;
		protected System.Web.UI.WebControls.ImageButton btnExit;
		protected System.Web.UI.WebControls.DataGrid Datagrid1;
		protected System.Web.UI.WebControls.Label lblInfo;
		protected System.Web.UI.WebControls.ValidationSummary Validationsummary1;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.TextBox txtReply;
		protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator1;
		protected System.Web.UI.WebControls.Panel Panel1;
		protected System.Web.UI.WebControls.ImageButton btnUpdate;
		protected System.Web.UI.WebControls.ImageButton btnReply;
		protected System.Web.UI.HtmlControls.HtmlForm Form1;		
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!Page.IsPostBack)
			{
				if(Object.Equals(Session["UserName"],null))
				{
					Response.Redirect("Error.aspx");
				}
				else
				{
					ViewState["Sort"] = "";
					Bind();	
					if(Hugo.BookShop.User.IsSupervisor(Session["UserName"].ToString()))
					{
						this.Panel1.Visible = true;
						this.btnAdd.Visible = false;
						this.btnUpdate.Visible =false;
					}
				}				
			}			
		}

		#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.btnUpdate.Click += new System.Web.UI.ImageClickEventHandler(this.btnUpdate_Click);
			this.btnAdd.Click += new System.Web.UI.ImageClickEventHandler(this.btnAdd_Click);
			this.btnExit.Click += new System.Web.UI.ImageClickEventHandler(this.btnExit_Click);
			this.Datagrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.Datagrid1_PageIndexChanged);
			this.Datagrid1.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.Datagrid1_EditCommand);
			this.Datagrid1.SortCommand += new System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.Datagrid1_SortCommand);
			this.Datagrid1.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.Datagrid1_DeleteCommand);
			this.btnReply.Click += new System.Web.UI.ImageClickEventHandler(this.btnReply_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Bind()
		{
			try
			{
				DataSet ds;
				if(Hugo.BookShop.User.IsSupervisor(Session["UserName"].ToString()))
				{
					ds = Hugo.BookShop.LackRecord.GetLackRecords();
				}
				else
				{
					ds = Hugo.BookShop.LackRecord.GetLackRecords(int.Parse(Session["UserID"].ToString()));
				}
				ds.Tables[0].DefaultView.Sort = ViewState["Sort"].ToString();
				this.Datagrid1.DataSource = ds.Tables[0].DefaultView;
				this.Datagrid1.DataBind();
			}
			catch(Exception ex)
			{
				ShowMsg(ex.Message,1);
			}			
		}

		private void btnExit_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			Page.RegisterStartupScript("Close", "<Script>window.opener=null;window.close();</Script>");
		}

		private void btnAdd_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			try
			{
				Hugo.BookShop.LackRecord lr = new Hugo.BookShop.LackRecord();
				lr.UserId = int.Parse(Session["UserID"].ToString());
				lr.Name = this.txtName.Text.Trim();
				lr.Publisher = this.txtPublisher.Text.Trim();
				lr.Add();
				ShowMsg("Add lack book record successful!",0);
				Bind();
			}
			catch(Exception ex)
			{
				ShowMsg(ex.Message,1);
			}			
		}

		private void ShowMsg(string Message,int MessageType)
		{
			this.lblInfo.Visible = true;
			if(MessageType==0)//Mission accomplished
			{
				this.lblInfo.Text = Message;
				this.lblInfo.ForeColor = Color.Blue;
			}
			else
			{
				this.lblInfo.Text = Message;
				this.lblInfo.ForeColor = Color.Red;
			}			
		}

		private void Datagrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			this.txtName.Text = this.Datagrid1.Items[e.Item.ItemIndex].Cells[1].Text;
			this.txtPublisher.Text = this.Datagrid1.Items[e.Item.ItemIndex].Cells[2].Text;
			if(Hugo.BookShop.User.IsSupervisor(Session["UserName"].ToString()))
			{
				this.btnReply.Visible = true;
				ViewState["Id"] = this.Datagrid1.DataKeys[e.Item.ItemIndex].ToString();
			}
		}

		private void Datagrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			try
			{
				Hugo.BookShop.LackRecord.Delete(int.Parse(this.Datagrid1.DataKeys[e.Item.ItemIndex].ToString()));
				ShowMsg("Delete successful!",0);
				Bind();
			}
			catch(Exception ex)
			{
				ShowMsg(ex.Message,1);
			}
			
		}

		private void Datagrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			this.Datagrid1.CurrentPageIndex = e.NewPageIndex;
			Bind();
		}

		private void Datagrid1_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
		{
			if(ViewState["Sort"].ToString() == e.SortExpression)
			{
				ViewState["Sort"] += " desc";
			}
			else
			{
				ViewState["Sort"] = e.SortExpression;
			}
			Bind();
		}

		private void btnUpdate_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			try
			{
				Hugo.BookShop.LackRecord lr = new Hugo.BookShop.LackRecord();
				lr.ID = int.Parse(this.Datagrid1.DataKeys[this.Datagrid1.SelectedIndex].ToString());
				lr.Name = this.txtName.Text.Trim();
				lr.Publisher = this.txtPublisher.Text.Trim();
				lr.Update();
				ShowMsg("Update record successful!",0);
				Bind();
			}
			catch(Exception ex)
			{
				ShowMsg(ex.Message,1);
			}
			this.btnAdd.Visible = true;
			this.btnUpdate.Visible = false;
		}

		private void btnReply_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			try
			{
				Hugo.BookShop.LackRecord lr = new Hugo.BookShop.LackRecord();
				lr.ID = int.Parse(ViewState["Id"].ToString());
				lr.Reply = this.txtReply.Text.Trim();
				lr.SetReply();
				ShowMsg("Update record successful!",0);
				Bind();
			}
			catch(Exception ex)
			{
				ShowMsg(ex.Message,1);
			}
			this.btnReply.Visible = false;
		}
	}
}