picturemanage.aspx.cs

一个不错的asp.net网站

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 MisPersonnel.Components;
using System.Data.SqlClient;

namespace MisPersonnel.DesktopModules.Picture
{
	/// <summary>
	/// PictureManage 的摘要说明。
	/// </summary>
	public class PictureManage : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.ListBox EmployeeList;
		protected System.Web.UI.WebControls.Button SelectBtn;
		protected System.Web.UI.WebControls.Label EmployName;
		protected System.Web.UI.WebControls.Image EmployPic;
		protected System.Web.UI.WebControls.Button UpdateBtn;
		protected System.Web.UI.WebControls.Button DeleteBtn;
		protected System.Web.UI.WebControls.Button AddBtn;
	
		public int nPictureID = 0;
		public int nEmployeeID    = -1;
		private static string EmployeeName = "";

		private void Page_Load(object sender, System.EventArgs e)
		{
			///判断用户是否登陆
			if(Session["UserID"] == null)
			{
				Response.Redirect("~/Default.aspx");
			}
			///判断用户是否是超级管理员
			if(Components.User.IsAuthorityAdmin(Session["UserID"].ToString()) >= Components.User.USERTYPENORMAL)
			{
				Response.Write("<script>alert(\"你没有权限，请与管理员联系！\")</script>");
				Response.Write("<script>history.back();</script>");
			}			
			if(ViewState["PictureID"] != null)
			{
				nPictureID = Int32.Parse(ViewState["PictureID"].ToString()) > 0 ? Int32.Parse(ViewState["PictureID"].ToString()) : 0;
			}	
			if(Request.Params["EmployeeID"] != null)
			{
				nEmployeeID = Int32.Parse(Request.Params["EmployeeID"].ToString());			
			}
			if(!Page.IsPostBack)
			{
				///绑定控件的数据
				BindEmployeeData();

				///设置员工的选择项
				MisSystem.SetListBoxItem(EmployeeList,nEmployeeID.ToString());

				if(nEmployeeID > -1)
				{
					BindPictureData(nEmployeeID);
					EmployName.Text = EmployeeName;
				}
			}	
	
			///添加删除确认对话框
			DeleteBtn.Attributes.Add("onclick","return confirm('" + MisSystem.OPERATIONDELETEMESSAGE + "');");	
		}
		
		private void BindEmployeeData()
		{
			///定义获取数据的类
			MisPersonnel.Components.Employee employ = new MisPersonnel.Components.Employee();
			SqlDataReader rece = employ.GetEmployees();

			///设定控件的数据源
			EmployeeList.DataSource = rece;
			
			///设定控件的Text属性和Value属性
			EmployeeList.DataTextField = "EmployName";
			EmployeeList.DataValueField = "EmployeeID";

			///绑定控件的数据
			EmployeeList.DataBind();

			///关闭数据读取器和数据库的连接
			rece.Close();
		}

		private void BindPictureData(int nEmployeeID)
		{
			///定义获取数据的类
			MisPersonnel.Components.Picture picture = new MisPersonnel.Components.Picture();
			SqlDataReader recp = picture.GetPictureByEmployee(nEmployeeID);
			
			///从获取的数据中读取数据
			if(recp.Read())
			{
				///显示图片信息
				EmployPic.ImageUrl = "~/DesktopModules/Picture/ShowPicture.aspx?PictureID="
					+ recp["PictureID"].ToString();
				///临时保存图片的ID
				ViewState["PictureID"] = recp["PictureID"].ToString();

				///设置添加、修改和删除按钮的可用性
				if(Int32.Parse(recp["PictureID"].ToString()) > 0)
				{
					AddBtn.Enabled = false;
					UpdateBtn.Enabled = true;
					DeleteBtn.Enabled = true;
				}
				else
				{
					AddBtn.Enabled = true;
					UpdateBtn.Enabled = false;
					DeleteBtn.Enabled = false;
				}
			}
			///关闭数据读取器和数据库的连接
			recp.Close();
		}

		#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.EmployeeList.SelectedIndexChanged += new System.EventHandler(this.EmployeeList_SelectedIndexChanged);
			this.AddBtn.Click += new System.EventHandler(this.AddBtn_Click);
			this.UpdateBtn.Click += new System.EventHandler(this.UpdateBtn_Click);
			this.DeleteBtn.Click += new System.EventHandler(this.DeleteBtn_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void AddBtn_Click(object sender, System.EventArgs e)
		{
			if(EmployeeList.SelectedIndex > -1)
			{
				///跳转到添加页面
				Response.Redirect("~/DesktopModules/Picture/AddPicture.aspx?EmployeeID=" + EmployeeList.SelectedValue);
			}
			else
			{
				///显示操作结果信息
				Response.Write ("<script>window.alert('" + MisSystem.OPERATIONNOSELECTMESSAGE + "')</script>");
			}		
		}

		private void UpdateBtn_Click(object sender, System.EventArgs e)
		{
			if(EmployeeList.SelectedIndex > -1)
			{
				///跳转到添加页面
				Response.Redirect("~/DesktopModules/Picture/UpdatePicture.aspx?EmployeeID="
					+ EmployeeList.SelectedValue + "&PictureID=" + ViewState["PictureID"].ToString());
			}
			else
			{
				///显示操作结果信息
				Response.Write ("<script>window.alert('" + MisSystem.OPERATIONNOSELECTMESSAGE + "')</script>");
			}		
		}

		private void DeleteBtn_Click(object sender, System.EventArgs e)
		{
			if(EmployeeList.SelectedIndex > -1)
			{
				MisPersonnel.Components.Employee employ = new MisPersonnel.Components.Employee();
				MisPersonnel.Components.Picture picture = new MisPersonnel.Components.Picture();
				
				try
				{
					if(ViewState["PictureID"] == null)
					{
						return;
					}
					employ.UpdateEmployPicture(Int32.Parse(EmployeeList.SelectedValue),0);
					picture.DeletePicture(Int32.Parse(ViewState["PictureID"].ToString()));

					///删除显示的图片
					EmployPic.ImageUrl = "";
					AddBtn.Enabled = true;
					UpdateBtn.Enabled = false;
					DeleteBtn.Enabled = false;
					
					///显示操作结果信息
					Response.Write ("<script>window.alert('" + MisSystem.OPERATIONDELETESUCCESSMESSAGE + "')</script>");
				}
				catch(Exception ex)
				{			
					///显示添加操作中的失败、错误信息
					Response.Redirect("~/DesktopModules/ErrorPage.aspx?ErrorUrl="
						+ MisSystem.RedirectErrorUrl(Request.RawUrl)
						+ "&ErrorMessage=" + ex.Message.Replace("\n"," "));
				}
			}
			else
			{
				///显示操作结果信息
				Response.Write ("<script>window.alert('" + MisSystem.OPERATIONNOSELECTMESSAGE + "')</script>");
			}	
		}

		private void EmployeeList_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			///显示选择员工的考评信息
			if(EmployeeList.SelectedIndex > -1)
			{
				///显示信息，并显示员工的名称
				BindPictureData(Int32.Parse(EmployeeList.SelectedValue));
				EmployName.Text = EmployeeList.SelectedItem.Text;
				EmployeeName = EmployeeList.SelectedItem.Text;
			}
			else
			{
				///显示操作结果信息
				Response.Write ("<script>window.alert('" + MisSystem.OPERATIONNOSELECTMESSAGE + "')</script>");
			}				
		}
	}
}