图片上传的Codebehind(自动生成所略图)

微博文章来源:网络整理本站编辑:兰特

using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration;
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 System.Text;
using cj168.util;

namespace cj168.Web.Mag.Admins.FeData
{
 /// <summary>
 /// Summary description for fedata.
 /// </summary>
 public class feUploadPic : System.Web.UI.Page
 {
 protected System.Web.UI.WebControls.TextBox txtboxPicTitle;
 protected System.Web.UI.WebControls.Calendar calPicDate;
 protected System.Web.UI.WebControls.DropDownList ddlPicType;
 protected System.Web.UI.WebControls.TextBox txtboxPicIntro;
 protected System.Web.UI.HtmlControls.HtmlInputFile filePicName;
 protected System.Web.UI.WebControls.Button btnSubmit;
 protected System.Web.UI.WebControls.Label lblPicInfo;
 protected System.Web.UI.WebControls.TextBox txtboxPicDate;
 protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator1;
 protected System.Web.UI.WebControls.RegularExpressionValidator vldCatName;
 protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator2;
 protected System.Web.UI.WebControls.CustomValidator CustomValidator1;
 protected System.Web.UI.WebControls.RegularExpressionValidator RegularExpressionValidator1;
 protected System.Web.UI.WebControls.HyperLink hlkOriPic;
 protected System.Web.UI.WebControls.HyperLink hlkNewPic;
 protected System.Web.UI.WebControls.RegularExpressionValidator Regularexpressionvalidator2;
 protected System.Web.UI.WebControls.RegularExpressionValidator Regularexpressionvalidator3;
 protected System.Web.UI.WebControls.CheckBoxList checkboxlistRewrite;



 private void Page_Load(object sender, System.EventArgs e)
 {
 // Put user code to initialize the page here
 //if(Page.IsPostBack)
 //txtboxPicDate.Text = calPicDate.SelectedDate.ToString();

 if(!Page.IsPostBack)
 {
 Bind2DropDownListPicType();

 //for(int i = 0;i < Request.Files.Count; i++)
 //{
 // checkboxlistRewrite.Items[i].Selected = false;
 //}
 }



 }

 public void Bind2DropDownListPicType()
 {
 cj168.DataAccess.Admins admins = new cj168.DataAccess.Admins();
 DataSet ds = admins.FePicTypeGet();
 //ddlPicType.DataSource = ;
 DataView dv = new DataView(ds.Tables["PicType"]);

 DataRowView drv = dv.AddNew();
 //DataColumnView dcv = dv.AddNew();
 drv["Title"] = "请选择";
 drv["fePicTypeID"] = "0";
 drv.EndEdit();


 dv.Sort = "fePicTypeID";

 ddlPicType.DataSource = dv;

 ddlPicType.DataBind();
 }

 public void UploadFile(object sender, System.EventArgs e)
 {

 string imgNameOnly, imgNameNoExt, imgExt;
 string imgThumbnail;
 int erroNumber = 0;
 System.Drawing.Image oriImg, newImg;
 string strFePicSavePath = ConfigurationSettings.AppSettings["FePicSavePath"].ToString();
 string strFePicThumbFormat = ConfigurationSettings.AppSettings["FePicThumbFormat"].ToString().ToLower();
 int intFeThumbWidth = Int32.Parse(ConfigurationSettings.AppSettings["FePicThumbWidth"]);
 string fileExt;
 string strPicTitle = txtboxPicTitle.Text;
 string strPicIntro = txtboxPicIntro.Text;
 string strPicDate = txtboxPicDate.Text;

 int intPicType = Int32.Parse(ddlPicType.SelectedItem.Value);
 string strPicType = intPicType.ToString() + "_" + DateTime.Now.Date.ToShortDateString() + "_";
 string strFePicWebPath = ConfigurationSettings.AppSettings["FePicWebPath"];

 cj168.DataAccess.Admins admins = new cj168.DataAccess.Admins();

 //if(admins.FePicTypeSet(textboxTitle.Text,0) < 0)
 // lblAddPicInfo.Text = "操作失败：已经存在相同名称类型，请修改";
 //else
 // lblAddPicInfo.Text = "操作成功";

 StringBuilder picInfo = new StringBuilder();



 if(Page.IsValid)
 {


 for(int i = 0;i < Request.Files.Count; i++)
 {
 HttpPostedFile PostedFile = Request.Files[i];
 fileExt = (System.IO.Path.GetExtension(PostedFile.FileName)).ToString().ToLower();
 //5-test.jpg
 imgNameOnly = strPicType + System.IO.Path.GetFileName(PostedFile.FileName);
 if(fileExt == ".jpg" || fileExt == ".gif" || fileExt == ".png")
 {

 if(System.IO.File.Exists(strFePicSavePath + imgNameOnly) && (checkboxlistRewrite.Items[i].Selected == false))
 {
 erroNumber = erroNumber + 1;
 picInfo.Append("错误：文件("+ (i+1) +") " + imgNameOnly + " 已经存在，请修改文件名 " );
 }
 }
 else
 {
 erroNumber = erroNumber + 1;
 if(fileExt == "")
 picInfo.Append("错误：请选择文件 " );
 else
 picInfo.Append("错误：文件("+ (i+1) +") " + imgNameOnly + " 扩展名 " + fileExt + " 不被许可 " );
 }

 }

 if(erroNumber > 0)
 {
 picInfo.Append("全部操作均未完成，请修改错误，再进行操作 ");

 hlkOriPic.ImageUrl = "";
 hlkOriPic.ToolTip = "";
 hlkNewPic.ImageUrl = "";
 hlkNewPic.ToolTip = "";
 }
 else
 {
 for(int i = 0;i < Request.Files.Count; i++)
 {

 HttpPostedFile PostedFile = Request.Files[i];
 imgNameOnly = strPicType + System.IO.Path.GetFileName(PostedFile.FileName);
 imgNameNoExt = System.IO.Path.GetFileNameWithoutExtension(PostedFile.FileName);
 imgExt = System.IO.Path.GetExtension(PostedFile.FileName).ToString().ToLower();


 oriImg = System.Drawing.Image.FromStream(PostedFile.InputStream);
 newImg = oriImg.GetThumbnailImage(intFeThumbWidth, intFeThumbWidth * oriImg.Height/oriImg.Width,null,new System.IntPtr(0));
 switch(imgExt)
 {
 //case ".jpeg":
 case ".jpg":
 oriImg.Save(strFePicSavePath + imgNameOnly , System.Drawing.Imaging.ImageFormat.Jpeg);
 break;
 case ".gif":
 oriImg.Save(strFePicSavePath + imgNameOnly , System.Drawing.Imaging.ImageFormat.Gif);
 break;
 case ".png":
 oriImg.Save(strFePicSavePath + imgNameOnly , System.Drawing.Imaging.ImageFormat.Png);
 break;
 }

 //oriImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameNoExt + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);


 switch(strFePicThumbFormat)
 {
 //jpeg format can get the smallest file size, and the png is the largest size
 //case "jpeg":
 case "jpg":
 newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);
 imgThumbnail = imgNameOnly + "_thumb.jpg";
 break;
 case "gif":
 newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.gif",System.Drawing.Imaging.ImageFormat.Gif);
 imgThumbnail = imgNameOnly + "_thumb.gif";
 break;
 case "png":
 newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.png",System.Drawing.Imaging.ImageFormat.Png);
 imgThumbnail = imgNameOnly + "_thumb.png";
 break;
 default:
 newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);
 imgThumbnail = imgNameOnly + "_thumb.jpg";
 break;

 }//switch

 picInfo.Append("文件　名：" + imgNameOnly + " ( " + oriImg.Width + " x " + oriImg.Height + " ) " + PostedFile.ContentLength/1024 + "KB ");
 picInfo.Append("缩略图名：" + imgThumbnail + " ( " + newImg.Width + " x " + newImg.Height + " ) ");

 hlkOriPic.ImageUrl = strFePicWebPath + imgNameOnly;
 hlkOriPic.ToolTip = "◆原图◆\n文件名：" + imgNameOnly + "\n尺寸：" + oriImg.Width + " x " + oriImg.Height + "\n字节：" + PostedFile.ContentLength/1024 + "KB";
 hlkNewPic.ImageUrl = strFePicWebPath + imgThumbnail;
 hlkNewPic.ToolTip = "◆缩略图◆\n文件名：" + imgThumbnail + "\n尺寸：" + newImg.Width + " x " + newImg.Height;


 oriImg.Dispose();
 newImg.Dispose();
 picInfo.Append("图片上传成功 ");
 if(admins.FePicDataSet(strPicTitle, strPicDate, imgNameOnly, intPicType, strPicIntro, imgThumbnail,0) < 0)
 picInfo.Append("保存信息到数据库失败 ");
 else
 picInfo.Append("保存信息到数据库成功 ");

 }//for
 picInfo.Append("所有操作成功 ");

 }// if erronumber = 0



 }
 else
 {
 picInfo.Append("有错误，请检查。操作未成功 ");

 hlkOriPic.ImageUrl = "";
 hlkOriPic.ToolTip = "";
 hlkNewPic.ImageUrl = "";
 hlkNewPic.ToolTip = "";

 }

 for(int i = 0;i < Request.Files.Count; i++)
 {
 checkboxlistRewrite.Items[i].Selected = false;
 }

 lblPicInfo.Text = picInfo.ToString();

 }

 public void CalDateSelected(object sender,System.EventArgs e)
 {
 txtboxPicDate.Text = calPicDate.SelectedDate.ToShortDateString();

 }

 public void ServerValidateCheckDate(object sender, System.Web.UI.WebControls.ServerValidateEventArgs value)
 {
 cj168.util.iUtil iUtils = new cj168.util.iUtil();
 if(!iUtils.IsDate(value.Value))
 value.IsValid = false;
 else
 value.IsValid = true;

 }



 #region Web Form Designer generated code
 override protected void OnInit(EventArgs e)
 {
 //
 // CODEGEN: This call is required by the ASP.NET Web Form Designer.
 //
 InitializeComponent();
 base.OnInit(e);
 }

 /// <summary>
 /// Required method for Designer support - do not modify
 /// the contents of this method with the code editor.
 /// </summary>
 private void InitializeComponent()
 {
 this.Load += new System.EventHandler(this.Page_Load);

 }
 #endregion
 }
}

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