picturemanage.aspx.cs

精通网络应用系统开发 光盘 该书是人民邮电出版社出版的

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Linq;
using System.Data.Linq;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.IO;

public partial class PictureManage : System.Web.UI.Page
{
	int nBookID = -1;

    protected void Page_Load(object sender, EventArgs e)
    {
		if (Request.Params["BookID"] != null)
		{
			nBookID = Int32.Parse(Request.Params["BookID"].ToString());
		}
		if (!Page.IsPostBack)
		{
			if (nBookID > -1)
			{
				///显示书籍名称
				BindBookData(nBookID);
				
				///显示图片列表信息
				BindPictureData(nBookID);
			}
		}

		///添加删除确认对话框
		DeleteBtn.Attributes.Add("onclick","return confirm('" + ASPNET35System.OPERATIONDELETEMESSAGE + "');");
    }

	private void BindBookData(int nBookID)
	{
		BookM book = new BookM();
		Book recb = book.GetSingleBook(nBookID);

		if (recb!=null)
		{
			///显示书籍名称
			Name.Text = recb.Name;
		}
	}			

	private void BindPictureData(int nBookID)
	{
		///从数据库获取图片信息
		PictureM picture = new PictureM();
		IList<Picture> recp = picture.GetPictureByBook(nBookID);

		///绑定图片列表的数据
		PictureList.DataSource = recp;
		PictureList.DataTextField = "Desn";
		PictureList.DataValueField = "PictureID";
		PictureList.DataBind();
	}

	protected void DeleteBtn_Click(object sender,EventArgs e)
	{
		if (PictureList.SelectedIndex <= -1)
		{
			///显示提示信息
			Response.Write("<script>window.alert('" + ASPNET35System.LISTBOX_NO_SELECT_ITEM + "')</script>");
			return;
		}

		try
		{
			///定义类
			PictureM picture = new PictureM();
			
			///删除操作
			picture.DeletePicture(Int32.Parse(PictureList.SelectedValue));
			
			///显示操作结果信息
			Response.Write("<script>window.alert('" + ASPNET35System.OPERATIONDELETESUCCESSMESSAGE + "')</script>");

			///重新绑定数据
			BindPictureData(nBookID);
		}
		catch (Exception ex)
		{
			///显示删除操作中的失败、错误信息
			Response.Redirect("~/DesktopModules/ErrorPage.aspx?ErrorUrl="
				+ ASPNET35System.RedirectErrorUrl(Request.RawUrl)
				+ "&ErrorMessage=" + ex.Message.Replace("\n"," "));
		}
	}

	protected void SetDefaultBtn_Click(object sender,EventArgs e)
	{
		if (PictureList.SelectedIndex <= -1)
		{
			///显示提示信息
			Response.Write("<script>window.alert('" + ASPNET35System.LISTBOX_NO_SELECT_ITEM + "')</script>");
			return;
		}

		try
		{
			///定义类
			PictureM pictrure = new PictureM();

			///更新操作
			pictrure.UpdatePictureShow(Int32.Parse(PictureList.SelectedValue),nBookID);

			///显示操作结果信息
			Response.Write("<script>window.alert('" + ASPNET35System.OPERATIONUPDATESUCCESSMESSAGE + "')</script>");

			///重新绑定数据
			BindPictureData(nBookID);
		}
		catch (Exception ex)
		{
			///显示更新操作中的失败、错误信息
			Response.Redirect("~/DesktopModules/ErrorPage.aspx?ErrorUrl="
				+ ASPNET35System.RedirectErrorUrl(Request.RawUrl)
				+ "&ErrorMessage=" + ex.Message.Replace("\n"," "));
		}
	}

	protected void AddBtn_Click(object sender,EventArgs e)
	{
		///如果页面输入内容合法
		if (Page.IsValid == true)
		{
			///定义类
			PictureM picture = new PictureM();
			try
			{
				///添加新数据
				picture.AddPicture(nBookID,Desn.Text.Trim(),UploadPicture(),
					PictureFile.PostedFile.ContentType,
					Int32.Parse(ShowList.SelectedValue),Remark.Text);				

				///绑定附件列表的数据
				BindPictureData(nBookID);

				///显示操作结果信息
				Response.Write("<script>window.alert('" + ASPNET35System.OPERATIONADDSUCCESSMESSAGE + "')</script>");
			}
			catch (Exception ex)
			{
				///显示添加操作中的失败、错误信息
				Response.Redirect("~/DesktopModules/ErrorPage.aspx?ErrorUrl="
					+ ASPNET35System.RedirectErrorUrl(Request.RawUrl)
					+ "&ErrorMessage=" + ex.Message.Replace("\n"," "));
			}
		}
	}

	private string UploadPicture()
	{
		if ((Desn.Text.Trim() != "") && (PictureFile.PostedFile.ContentLength > 0))
		{
			String fileName = PictureFile.PostedFile.FileName.Substring(PictureFile.PostedFile.FileName.LastIndexOf("\\"),
				PictureFile.PostedFile.FileName.Length - PictureFile.PostedFile.FileName.LastIndexOf("\\"));

			String fileTime = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString()
				+ DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString()
				+ DateTime.Now.Second.ToString() + DateTime.Now.Minute.ToString()
				+ DateTime.Now.Millisecond.ToString();

			fileName = "\\" + fileTime + GetRandomint() + fileName.Substring(fileName.IndexOf("."),fileName.Length - fileName.IndexOf("."));
			string sFileName = Server.MapPath(Request.ApplicationPath) + "\\Pictures" + fileName;

			if (File.Exists(sFileName) == false)
			{
				try
				{
					//把文件存入磁盘，如果失败，导向提示页面
					PictureFile.PostedFile.SaveAs(sFileName);
					return ("\\Pictures" + fileName);
				}
				catch (Exception ex)
				{
					string sRawURL = Request.RawUrl;

					if (sRawURL.IndexOf("?") > -1)
					{
						sRawURL = sRawURL.Substring(0,sRawURL.IndexOf("?"));
					}
					Response.Redirect("~/DesktopModules/ErrorPage.aspx?ErrorUrl=" + sRawURL + "&ErrorMessage=" + ex.Message.Replace("\n"," "));
				}
			}
			else
			{
				Response.Write("<script>alert(\"你上传的文件已经存在！\")</script>");
			}
		}
		else
		{
			Response.Write("<script>alert(\"你输入的文件描述\\文件名为空，请重新输入！\")</script>");
		}

		return ("");
	}

	private String GetRandomint()
	{
		Random random = new Random();
		return (random.Next(10000).ToString());
	}
}