positon_add_img.aspx.cs

企业网站前台后台源程序,用于大中小型企业网站后台程序开发

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 BLL;
using Socut.Data;
using System.IO; 
using System.Drawing.Imaging;

namespace Websystem.admin
{
	/// <summary>
	/// Positon_add_img 的摘要说明。
	/// </summary>
	public class Positon_add_img : System.Web.UI.Page
	{
			protected user us=new user();
		protected other ot=new other();
		protected System.Web.UI.WebControls.DataGrid MyDataGrid;
		protected System.Web.UI.WebControls.Label lblPageCount;
		protected System.Web.UI.WebControls.Label lblCurrentIndex;
		protected System.Web.UI.WebControls.LinkButton btnFirst1;
		protected System.Web.UI.WebControls.LinkButton btnPrev1;
		protected System.Web.UI.WebControls.LinkButton btnNext1;
		protected System.Web.UI.WebControls.LinkButton btnLast1;
		protected MagicAjax.UI.Controls.AjaxPanel AjaxPanel1;
		protected System.Web.UI.WebControls.TextBox TextBox3;
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.Label strStatus;
		protected CData myData=new CData();

	protected int po_id=1;
		private void Page_Load(object sender, System.EventArgs e)
		{CData myData=new CData();
		//	Response.Write("<font color=\"#0000FF\">提示：产品增加成功！本页面是管理本产品的展示图片，可点右边的‘新增’来增加展示图。</font>");
			other ot = new other();
			if(ot.isDefined("id"))
			{
				try
				{
					po_id=Convert.ToInt32(Request.QueryString["id"].ToString().Trim().Replace("'",""));
				}
				catch
				{
					System.Web.HttpContext.Current.Response.Redirect("../error.aspx?message=该类别暂时锁定");
				}
			}


			//删除数据
			if(ot.isDefined("delid"))
			{
				string[] rowid=Request.Form["delid"].ToString().Split(new char[]{','});
				for(int i=0;i<rowid.Length;i++)
				{
			
					delrow(Convert.ToInt32(rowid[i]));
				}
			//	Response.Redirect("Positon_add_img.aspx?type="+po_id,true);
BindGrid();
			}
			//数据显示
			ot.chk_user();
			btnFirst1.Text = "最首页";
			btnPrev1.Text = "前一页";
			btnNext1.Text = "下一页";
			btnLast1.Text = "最后页";
			if(!this.IsPostBack)
				BindGrid();
		}

		#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.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		//删除记录
		protected void delrow(int id)
		{
			CData myData=new CData();

			string sql="delete from MERCHANDISEPIC where ID="+id;
			myData.GetExecuteNonQuery(sql);
		

		}
		protected void BindGrid()
		{
			DataSet ds=new DataSet();
			CData myData=new CData();
			string sql = "";
		
				sql = "select * from MERCHANDISEPIC where MERCHANDISEID="+po_id+" order by id desc";
			
				
			ds = myData.GetDataSet(sql, 0, 0, "Document");
			this.MyDataGrid.DataSource = ds.Tables["Document"].DefaultView;
			MyDataGrid.DataBind();
			ShowStats();

		}
		private void ShowStats()
		{
			lblCurrentIndex.Text = "第 " + (MyDataGrid.CurrentPageIndex + 1).ToString() + " 页";
			lblPageCount.Text = "总共 " + MyDataGrid.PageCount.ToString() + " 页";
		}

		public void PagerButtonClick(object sender, EventArgs e)
		{
			string arg = ((LinkButton)sender).CommandArgument.ToString();
			switch(arg)
			{
				case "next":
					if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
					{
						MyDataGrid.CurrentPageIndex += 1;
					}
					break;
				case "prev":
					if (MyDataGrid.CurrentPageIndex > 0)
					{
						MyDataGrid.CurrentPageIndex -= 1;
					}
					break;
				case "last":
					MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
					break;
				default:
					MyDataGrid.CurrentPageIndex = System.Convert.ToInt32(arg);
					break;
			}
			BindGrid();
			ShowStats();
		}


		public void MyDataGrid_Page(object sender, DataGridPageChangedEventArgs e)
		{
			int startIndex ;
			startIndex = MyDataGrid.CurrentPageIndex * MyDataGrid.PageSize;
			MyDataGrid.CurrentPageIndex = e.NewPageIndex;
			BindGrid();
			ShowStats();
		}
		private void MyDataGrid_SelectedIndexChanged(object sender, System.EventArgs e)
		{
		
		}

			private void Button1_Click(object sender, System.EventArgs e)
			{
				if(upMorefile())
				{

				
					Response.Redirect("Positon_add_img.aspx?id="+po_id,true);

				}
			}

		private bool upMorefile()
		{
			//遍历File表单元素
			System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
			//状态信息
			System.Text.StringBuilder strMsg = new System.Text.StringBuilder("上传的文件信息分别为：<hr color=red>");
			int fileCount;
			int filecount = files.Count;
			try
			{
				for(fileCount = 0;fileCount<files.Count;fileCount++)
				{
					//定义访问客户端上传文件的对象
					System.Web.HttpPostedFile postedFile = files[fileCount];
					string fileName, fileExtension;
					//取得上传得文件名
					fileName = System.IO.Path.GetFileName(postedFile.FileName);
					if(fileName != String.Empty)
					{
						//取得文件的扩展名
						fileExtension = System.IO.Path.GetExtension(fileName);
						if(fileExtension==".gif"||fileExtension==".jpg"||fileExtension==".bmp")
						{//上传的文件信息
							strMsg.Append("上传的文件类型：" + postedFile.ContentType.ToString() + "<br/>");
							strMsg.Append("客户端文件地址：" + postedFile.FileName + "<br/>");
							strMsg.Append("上传文件的文件名：" + fileName +fileExtension +"<br/>");
							strMsg.Append("上传文件的路径：" + ""+ fileName +fileExtension + "<br/><hr color=red>");
							//保存到指定的文件夹
							string time=System.DateTime.Now.Year.ToString()+System.DateTime.Now.Month.ToString()+System.DateTime.Now.Day.ToString()+System.DateTime.Now.Hour.ToString()+System.DateTime.Now.Minute.ToString()+System.DateTime.Now.Second.ToString();
							string lujing_da="UpLoadFolder/Images/";
							string lujing=Server.MapPath("../"+lujing_da) +time+"_"+ fileName;
							string lujing_xiao=Server.MapPath("../"+lujing_da) + time+"_"+"xiao_"+fileName;
							postedFile.SaveAs(lujing);
							MakeThumbnail(lujing,lujing_xiao,78,51,"Cut");
							string content=Request.Form["TextBox3"].ToString().Trim().Replace("'","");
							string sql="insert into MERCHANDISEPIC (PICPATH,MERCHANDISEID,ISSMALL,REMARK) values ('"+lujing_da+time+"_"+ fileName+"',"+po_id+",'"+lujing_da+time+"_"+"xiao_"+fileName+"','"+content+"')";
							myData.GetExecuteNonQuery(sql);
						}
						else
						{
							strStatus.Text="文件类型错误!,只能上传jpg、gif和bmp格式的图片";

							return false;
						}
					}
				}

				strStatus.Text = strMsg.ToString();
				return true;
			}
			catch(System.Exception error)
			{
				strStatus.Text = error.Message;
				return false;

			}
		}

		/// <summary>
		/// 生成缩略图
		/// </summary>
		/// <param name="originalImagePath">源图路径（物理路径）</param>
		/// <param name="thumbnailPath">缩略图路径（物理路径）</param>
		/// <param name="width">缩略图宽度</param>
		/// <param name="height">缩略图高度</param>
		/// <param name="mode">生成缩略图的方式</param>    
		public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
		{
			System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
            
			int towidth = width;
			int toheight = height;
        
			int x = 0;
			int y = 0;
			int ow = originalImage.Width;
			int oh = originalImage.Height;        

			switch (mode)
			{        
				case "HW"://指定高宽缩放（可能变形）                
					break;
				case "W"://指定宽，高按比例                    
					toheight = originalImage.Height * width/originalImage.Width;
					break;
				case "H"://指定高，宽按比例
					towidth = originalImage.Width * height/originalImage.Height;                    
					break;        
				case "Cut"://指定高宽裁减（不变形）                
					if((double)originalImage.Width/(double)originalImage.Height > (double)towidth/(double)toheight)
					{
						oh = originalImage.Height;
						ow = originalImage.Height*towidth/toheight;
						y = 0;
						x = (originalImage.Width - ow)/2;
					}
					else
					{
						ow = originalImage.Width;
						oh = originalImage.Width*height/towidth;
						x = 0;
						y = (originalImage.Height - oh)/2;
					}
					break;                    
				default :
					break;
			}    
            
			//新建一个bmp图片
			System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth,toheight);

			//新建一个画板
			Graphics g = System.Drawing.Graphics.FromImage(bitmap);

			//设置高质量插值法
			g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

			//设置高质量,低速度呈现平滑程度
			g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

			//清空画布并以透明背景色填充
			g.Clear(Color.Transparent);        

			//在指定位置并且按指定大小绘制原图片的指定部分
			g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight), 
				new Rectangle(x, y, ow,oh),
				GraphicsUnit.Pixel);

			try
			{            
				//以jpg格式保存缩略图
				bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
			}
			catch(System.Exception e)
			{
				throw e;
			}
			finally
			{
				originalImage.Dispose();
				bitmap.Dispose();                        
				g.Dispose();
			}
		}




	}
}