图片上传代码示例

using System;
using System.IO;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

using System.Data.SqlClient;
using KunslyNetDll.Common;
using HunMSM.include;

namespace HunMSM.photo
...{
    /**//// <summary>
    /// 图片上传。
    /// </summary>
    public partial class _upphoto : System.Web.UI.Page
    ...{
        public string sPath = "";
        public string extension;
        public string path;
        public string fileName;
        public string smobile;
        protected void Page_Load(object sender, System.EventArgs e)
        ...{
            // 在此处放置用户代码以初始化页面
            AddControl();
            if (Session["UserMobile"] == null)            
                Response.Write("<script language=javascript>alert('请先登录，才允许上传图片');history.back(-1)</script>");
            else
                smobile = Session["UserMobile"].ToString().Trim();
            if(!this.IsPostBack)
            ...{
                DropDownPhotoType();
                DropDownPhotoColl();
            }
        }

        void AddControl()#region void AddControl()

        /**//// <summary>
        /// 添加控件
        /// </summary>
        private void AddControl()
        ...{
            Control ctrl;
            
            sPath = KunslyWebPage.GetRelativeRootPath(this);

            //头
            ctrl = LoadControl(sPath + "CtrlHead.ascx");
            HolderHead.Controls.Add(ctrl);

            //左边框
            ctrl = LoadControl(sPath + "CtrlLeft.ascx");
            HolderLeft.Controls.Add(ctrl);

            //底部
            ctrl = LoadControl(sPath + "CtrlBottom.ascx");
            HolderBottom.Controls.Add(ctrl);
        }

        #endregion    

        Web 窗体设计器生成的代码#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()
        ...{    

        }
        #endregion

        protected void Button1_Click(object sender, System.EventArgs e)
        ...{
            int ncount = GetRecordCount();
            if (ncount == 0)
            ...{
                KunslyWebPage.ShowMessage(this,"请先创建相册，才允许上传图片");
                return;
            }
            //    Response.Write("<script language=javascript>alert('请先创建相册，才允许上传图片');history.back(-1)</script>");
            //else
            //{
            if(UploadFile.PostedFile.FileName.Trim() == "") 
            ...{ 
                //Response.Write("<script language=javascript>alert('老大，没文件怎么传啊');history.back(-1)</script>");
                KunslyWebPage.ShowMessage(this,"请选择文件");
                return;
            } 
            //    else
            //    {
            if (txtMessage.Text.Trim() == "")
            ...{
                KunslyWebPage.ShowMessage(this,"请输入简介");
                return;            
            }
                //Response.Write("<script language=javascript>alert('老大，请输入简介');history.back(-1)</script>");
            extension = Path.GetExtension(UploadFile.PostedFile.FileName).ToUpper(); 
            
            if (extension != ".JPG" && extension != ".GIF")
            ...{
                KunslyWebPage.ShowMessage(this,"非法文件，不允许上传,只允许上传.jpg或.gif文件");
                return;            
            }
            //Response.Write("<script language=javascript>alert('非法文件，不允许上传');history.back(-1)</script>");
            if (UploadFile.PostedFile.ContentLength >= 1000000) //大于1M不允许上传
            ...{
                KunslyWebPage.ShowMessage(this,"文件过大,不能上传,单个文件最大不超过1M");
                return;            
            }
            fileName = DateTime.Now.ToString("yyyyMMddhhmmss"); 
            path = Server.MapPath("") + "/upfile/" + fileName + extension; 
            updata();
        }    
                
                    
            
        


        void updata()#region void updata()
        void updata()
            ...{
            //这个过程可以更新的数据库，把图片地址插入到数据库
            UploadFile.PostedFile.SaveAs(path); 
            int width,height,newwidth=100,newheight; 
            System.Drawing.Image image1;
            image1 =  System.Drawing.Image.FromFile(path);
            width=image1.Width;
            height=image1.Height;
            newheight=height*newwidth/width;
            Bitmap bm = new Bitmap(image1,newwidth, newheight);
            bm.Save(Server.MapPath("") + "/upfile/" + fileName + "_s" + extension, ImageFormat.Jpeg);
            image1 =  System.Drawing.Image.FromFile(path);
            LblShowPhoto.Text = "照片已经成功上传，文件名为：" + fileName + extension + " 占用空间：";
            LblShowPhoto.Text += UploadFile.PostedFile.ContentLength/1024 + "k";
            string strtxtMessage = txtMessage.Text;
            strtxtMessage = strtxtMessage.Replace("'","＇");
            strtxtMessage = strtxtMessage.Replace(""","＂");
            strtxtMessage = strtxtMessage.Replace(" ","<br>");
            string strSql = "insert into photourl ";
            strSql += "(PhotoUrl,PhotoUrl_s,PhotoWidth,PhotoHeight,PhotoSize,Puttime,PhotoIntro,";
            strSql += "PhotoColl,Mobile,PhotoColl1)";
            strSql += " values ";
            strSql += "('"+fileName+extension+"','"+fileName + "_s" + extension+"',"+image1.Width+","+image1.Height;
            strSql += ","+UploadFile.PostedFile.ContentLength+",getdate(),'"+strtxtMessage;
            strSql += "',"+DdlPhotoType.SelectedValue.ToString().Trim()+",'"+smobile+"',";
            strSql += DdlPhotoColl.SelectedValue.ToString().Trim()+")";
            SqlConnection dbConn = DbConnection.GetSqlConn();
            SqlCommand dbCmd = new SqlCommand(strSql, dbConn);
            dbCmd.ExecuteNonQuery();
            dbCmd.Dispose();
            dbConn.Close();
            image1.Dispose();
            bm.Dispose();


            }
        #endregion


        void DropDownPhotoType()#region void DropDownPhotoType()
        void DropDownPhotoType()
        ...{
            //这个过程是将照片类型绑定
            string strSql = "select * from photocolltype";
            SqlConnection dbConn = DbConnection.GetSqlConn();
            SqlCommand dbCmd = new SqlCommand(strSql, dbConn);
            SqlDataReader dbReader = dbCmd.ExecuteReader();
            DdlPhotoType.Items.Clear();
            while (dbReader.Read())
            ...{
                DdlPhotoType.Items.Add(new ListItem(dbReader["CollType"].ToString(),dbReader["PhotoID"].ToString()));

            }
            dbReader.Close();
            dbConn.Close();
        }
        #endregion

        void DropDownPhotoColl()#region void DropDownPhotoColl()
        void DropDownPhotoColl()
        ...{
            //这个过程是将相册类型绑定            
            string strSql = "select * from PhotoColl where mobile=" +"'"+smobile+"'";
            SqlConnection dbConn = DbConnection.GetSqlConn();
            SqlCommand dbCmd = new SqlCommand(strSql, dbConn);
            SqlDataReader dbReader = dbCmd.ExecuteReader();
            DdlPhotoColl.Items.Clear();
            while (dbReader.Read())
            ...{
                DdlPhotoColl.Items.Add(new ListItem(dbReader["PhotoColl"].ToString(),dbReader["PhotoID"].ToString()));
                

            }
            
                
            dbReader.Close();
            dbConn.Close();
        }
        #endregion

        int GetRecordCount()#region int GetRecordCount()
        /**//// <summary>
        /// 取得记录数
        /// </summary>
        /// <returns></returns>
        private int GetRecordCount()
        ...{
            string strSql = "select count(*) as tt";
            strSql += " from photocoll";
            strSql += " where mobile=" + smobile;            

            SqlConnection dbConn = DbConnection.GetSqlConn();
            SqlCommand dbCmd = new SqlCommand(strSql, dbConn);
            SqlDataReader dbReader = dbCmd.ExecuteReader();

            int nCount = 0;
            if(dbReader.Read())
                nCount = Convert.ToInt32(dbReader["tt"]);
            
            dbReader.Close();
            dbConn.Close();
            return nCount;
        }

        #endregion 



    }
}