upfile.aspx.cs

本程序基于 asp.net 2.0 +sql server 2

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 lalablog;
public partial class edit_upfile : System.Web.UI.Page
{
    string randFileName;
    string fullFileName;
    int userid;
    string add_ip;
    int fileSize;
    DateTime add_date;
    int userTotalFileSize;

int perFileSize ;
    int totalFileSize;
    string[] allowedExtensions;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["userid"] == null)
            Response.Redirect("~/user/userLogin.aspx?url="+Server .HtmlEncode(Request .RawUrl ));
        else userid = Convert.ToInt32(Session["userid"]);

         writeSetting();

         if (IsPostBack)
         {
             if (FileUpload1.HasFile)
                 uploadimg();
                 
             else if (TextBox1.Value .Length > 8)
                 hfName.Value = Server.HtmlEncode(TextBox1.Value );

                 string aa = fileTypeString();
                 Response.Write("<script type=text/javascript>");
                 Response.Write("var editor=window.opener.document.getElementById('editor');");
                 Response.Write("editor.innerHTML+='" + aa + "';");
                 Response.Write("window.close();");
                 Response.Write("</script>");
         }
    }

    private string fileTypeString()
    {
        string returnStr;
        int x = hfName.Value.LastIndexOf(".");
        string fileExt = hfName.Value.Substring(x + 1);
        if (fileExt == "swf")
            returnStr = "<object classid=clsid:D27CDB6E-AE6D-11CF-96B8-444553540000 id=obj1 codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0 border=0 width=400 height=300><param name=movie value=" + hfName.Value + "><param name=quality value=High><PARAM NAME=Play VALUE=1><PARAM NAME=Loop VALUE=1><embed src=" + hfName.Value + " pluginspage=http://www.macromedia.com/go/getflashplayer type=application/x-shockwave-flash name=obj1 width=400 height=300 quality=High></object>"+"<br/>如果没有开始播放，是因为windows的安全设置问题，请左键点击激活flash控件后，右键点击flash选择播放<br/>";
        else if (fileExt == "mp3" || fileExt == "wmv" || fileExt == "wma")
            returnStr = "<EMBED src="+hfName .Value +" width=270 height=60 type=audio/mpeg LOOP=true AUTOSTART=true></EMBED>";
        else
            returnStr = "<a href=" + hfName.Value + ">" + hfName.Value + "</a>";
        return returnStr;

    }


    private void writeSetting()
    {
        firstpage f1 = new firstpage();
        f1.getSetting();
        this.perFileSize = f1.perFileSize;
        this.totalFileSize = f1.totalFileSize;
        myfunc m1 = new myfunc();
        this.allowedExtensions = m1.splitStr(f1.fileExt);

        //获取用户已经使用的空间大小
        string x = getUserTotalFileSize();
        if (x != "")
            this.userTotalFileSize = Convert.ToInt32(x);
        else
            this.userTotalFileSize = 0;

        setting.InnerHtml = "允许上传的文件类型为" + f1.fileExt;
        setting.InnerHtml += "<br>允许上传的单个文件大小为" + perFileSize+"KB";
        setting.InnerHtml += "<br>您还可以使用的空间为" + (totalFileSize*1000 - userTotalFileSize)/1000+"kB"; 
    }
    private string   getUserTotalFileSize()
    {
        string sql = "select sum(picSize) from pic where userid=" + this.userid;
        openDb open1 = new openDb(sql);
        return open1.getValue();;
    }

    private string uploadimg()
    {
        Boolean fileOK = false;

        //检验是否指定后缀
        if (FileUpload1.HasFile)
        {
            string fileExtension = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();

            String path = Server.MapPath("~/Uploadfiles/");
            randomTimeString rts = new randomTimeString();
            this.randFileName = rts.str+fileExtension ;
            this.fullFileName = path + randFileName;
            

            for (int i = 0; i < this.allowedExtensions .Length; i++)
            {
                if (fileExtension == this.allowedExtensions[i])
                    fileOK = true;
            }

            this.fileSize = FileUpload1.PostedFile.ContentLength;
            //利用postedFile.ContentLength来判断文件长度,检查是否符合文件大小,250000就是250k字节

            //判断单个文件大小是否符合要求
            if (fileOK && this.fileSize < perFileSize * 1000)
                fileOK = true;
            else
                fileOK = false;

            //判断用户总共已经上传了多少文件
            if (fileOK && this.userTotalFileSize < totalFileSize * 1000)
                fileOK = true;
            else
                fileOK = false;
        }

        if (fileOK)
        {
            try
            {
                FileUpload1.PostedFile.SaveAs(this.fullFileName);

                saveToDb();

                string path = Request.ApplicationPath;
                if (path != "/")
                    hfName.Value = path + "/uploadfiles/" + randFileName;
                else
                    hfName.Value = "/uploadfiles/" + randFileName;
                
            }
            catch (Exception ex)
            {
                displayJavaMsg(ex.Message);
            }
        }
        else
        {
            displayJavaMsg("无法上传的文件类型或文件大小超过允许值");
        }
        return "";
    }

    private void saveToDb()
    {
        this.add_date = DateTime.Now;
        this.add_ip = Request.UserHostAddress;

        string sql = "insert into pic (userid,picName,upfilename,picSize,add_date,add_ip) ";
        sql += "values(" + this.userid + ",'file.gif','" + this.randFileName + "'," + this.fileSize;
        sql += ",'" + this.add_date + "','" + this.add_ip + "')";

        openDb db1 = new openDb(sql);
        string msg = db1.update();

        //myfunc m1 = new myfunc(msg);
        // Response.Write(m1.JavaMsg());
    }

    private void displayJavaMsg(string str)
    {
        Response.Write("<div class=center><script type=text/javascript>alert('" + str + "');</script>");
    }

}