edit.aspx.cs

个人博客。。毕业设计````用来做毕业设计`

using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.Text;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using WesternByte.MyBlog.Core.Blog;
using WesternByte.MyBlog.Core.Picture;
using WesternByte.MyBlog.Core.Category;

namespace WesternByte.MyBlog.Blog.Admin.Picture
{
	/// <summary>
	/// Edit 的摘要说明。
	/// </summary>
	public class Edit : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataList pictureCategory;
		protected System.Web.UI.WebControls.RequiredFieldValidator valTitleRequired;
		protected System.Web.UI.WebControls.TextBox subject;
		protected System.Web.UI.WebControls.DropDownList categoryID;
		protected System.Web.UI.WebControls.Button editButton;
		protected System.Web.UI.HtmlControls.HtmlInputFile image;
		protected PictureDAO pDAO = new PictureDAO();
		protected CategoryDAO cDAO = new CategoryDAO();
	
		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(Session["Blog"]!=null)
			{
				BlogVO bVO = (BlogVO)Session["Blog"];
				if(!Page.IsPostBack)
				{
					int PictureID = Convert.ToInt32(Page.Request.QueryString["PictureID"]);
					PictureVO pVO = pDAO.Load(PictureID);
					subject.Text = pVO.Subject;
					BindData(bVO.BlogID,pVO.CategoryID);
				}
			}
			else
			{
				Page.Response.Redirect("/Login.aspx");
			}
		}

		private void BindData(int BlogID,int CategoryID)
		{
			//分类下拉列表
			DataSet cDs = cDAO.LoadList(BlogID,"p");
			categoryID.DataSource = cDs.Tables[0].DefaultView;
			categoryID.DataBind();
			for(int i=0;i<categoryID.Items.Count;i++)
			{
				if(categoryID.Items[i].Value == CategoryID.ToString())
				{
					categoryID.Items[i].Selected = true;
					break;
				}
			}
			categoryID.Enabled = false;

			//分类列表
			cDs.Tables[0].Columns.Add("CategoryStr");
			for(int i=0;i<cDs.Tables[0].Rows.Count;i++)
			{
				cDs.Tables[0].Rows[i]["CategoryStr"] = "<a href=\"Picture.aspx?CategoryID="+cDs.Tables[0].Rows[i]["CategoryID"].ToString()+"\">"+cDs.Tables[0].Rows[i]["Name"].ToString()+"</a>";
			}
			this.pictureCategory.DataSource = cDs.Tables[0].DefaultView;
			this.pictureCategory.DataBind();
		}

		#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.editButton.Click += new System.EventHandler(this.editButton_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void editButton_Click(object sender, System.EventArgs e)
		{
			if(Session["Blog"]!=null)
			{
				BlogVO bVO = (BlogVO)Session["Blog"];
				int PictureID = Convert.ToInt32(Page.Request.QueryString["PictureID"]);
				PictureVO pVO = pDAO.Load(PictureID);
				string imgExt;
				System.Drawing.Image oriImg, newImg, resImg;

				string imageSavePath = Server.MapPath("/") + ConfigurationSettings.AppSettings["ImageSavePath"].ToString() + bVO.BlogID + "\\" + categoryID.SelectedValue + "\\";
				int imageThumbWidth = Int32.Parse(ConfigurationSettings.AppSettings["ImageThumbWidth"]);
				int imageResizeWidth = Int32.Parse(ConfigurationSettings.AppSettings["ImageResizeWidth"]);
				int imageThumbHeight = 0,imageResizeHeight = 0;
				string imageNewName = DateTime.Now.ToString("yyyyMMddHHmmss");
				int back = 0;
				bool flag = false;
				try
				{
					if(Page.IsValid)
					{
						if(image.Value!="")
						{
							HttpPostedFile PostedFile = image.PostedFile;
							imgExt = System.IO.Path.GetExtension(PostedFile.FileName).ToString().ToLower();
							if(imgExt != ".jpg" && imgExt != ".gif" && imgExt != ".png")
							{
								back = - 2;
							}
							else
							{
								flag = true;
								imageNewName += imgExt;
								oriImg = System.Drawing.Image.FromStream(PostedFile.InputStream);
								if(oriImg.Width<imageThumbWidth&&oriImg.Height<imageThumbWidth)
								{
									imageThumbHeight = oriImg.Height;
									imageThumbWidth = oriImg.Width;
								}
								else
								{
									if(oriImg.Width<oriImg.Height)
									{
										imageThumbHeight = imageThumbWidth;
										imageThumbWidth = imageThumbHeight * oriImg.Width/oriImg.Height;
									}
									else if(oriImg.Width>oriImg.Height)
									{
										imageThumbHeight = imageThumbWidth * oriImg.Height/oriImg.Width;
									}
									else imageThumbHeight = imageThumbWidth;
								}
								newImg = oriImg.GetThumbnailImage(imageThumbWidth,imageThumbHeight ,null,new System.IntPtr(0));

								if(oriImg.Width<imageResizeWidth&&oriImg.Height<imageResizeWidth)
								{
									imageResizeHeight = oriImg.Height;
									imageResizeWidth = oriImg.Width;
								}
								else
								{
									if(oriImg.Width<oriImg.Height)
									{
										imageResizeHeight = imageResizeWidth;
										imageResizeWidth = imageResizeHeight * oriImg.Width/oriImg.Height;
									}
									else if(oriImg.Width>oriImg.Height)
									{
										imageResizeHeight = imageResizeWidth * oriImg.Height/oriImg.Width;
									}
									else imageResizeHeight = imageResizeWidth;
								}
								resImg = oriImg.GetThumbnailImage(imageResizeWidth,imageResizeHeight ,null,new System.IntPtr(0));

								switch(imgExt)
								{
									case ".jpg":
										oriImg.Save(imageSavePath + "o_" + imageNewName , System.Drawing.Imaging.ImageFormat.Jpeg);
										newImg.Save(imageSavePath + "t_" + imageNewName , System.Drawing.Imaging.ImageFormat.Jpeg);
										resImg.Save(imageSavePath + "r_" + imageNewName , System.Drawing.Imaging.ImageFormat.Jpeg);
										break;
									case ".gif":
										oriImg.Save(imageSavePath + "o_" + imageNewName , System.Drawing.Imaging.ImageFormat.Gif);
										newImg.Save(imageSavePath + "t_" + imageNewName ,System.Drawing.Imaging.ImageFormat.Gif);
										resImg.Save(imageSavePath + "r_" + imageNewName ,System.Drawing.Imaging.ImageFormat.Gif);
										break;
									case ".png":
										oriImg.Save(imageSavePath + "o_" + imageNewName , System.Drawing.Imaging.ImageFormat.Png);
										newImg.Save(imageSavePath + "t_" + imageNewName ,System.Drawing.Imaging.ImageFormat.Png);
										resImg.Save(imageSavePath + "r_" + imageNewName ,System.Drawing.Imaging.ImageFormat.Png);
										break;
								}//switch
								oriImg.Dispose();
								newImg.Dispose();
								resImg.Dispose();

								System.IO.File.Delete(imageSavePath + "o_" + pVO.ImageUrl);
								System.IO.File.Delete(imageSavePath + "t_" + pVO.ImageUrl);
								System.IO.File.Delete(imageSavePath + "r_" + pVO.ImageUrl);
							}
						}//if
					}
				}
				catch(Exception ex)
				{
					Page.Response.Redirect("/Error.aspx?flag=editpicture&opStr=" + ex.Message);
				}

				pVO.Subject = subject.Text;
				if(flag)pVO.ImageUrl = imageNewName;
				back += pDAO.Update(pVO);

				if(back>0)
				{
					Page.Response.Redirect("/Success.aspx?flag=editpicture");
				}
				else
				{
					Page.Response.Redirect("/Error.aspx?flag=editpicture&back=" + back);
				}
			}
			else
			{
				Page.Response.Redirect("/Login.aspx");
			}
		}
	}
}