ERP/TradeManage/GlobalAshx/AjaxFileUpload.ashx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Web.Script.Serialization;
using System.Drawing;
using NetLibrary.Log;
using Newtonsoft.Json;

namespace TradeManage.GlobalAshx
{
    /// <summary>
    /// AjaxFileUpload 的摘要说明
    /// </summary>
    public class AjaxFileUpload : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            HttpFileCollection files = context.Request.Files;
            string DirectoryName = context.Request.QueryString["DirectoryName"];
            string width = context.Server.UrlDecode(context.Request.QueryString["width"]);
            string height = context.Server.UrlDecode(context.Request.QueryString["height"]);

            if (string.IsNullOrEmpty(DirectoryName) == true) DirectoryName = "ServerCookies";
            string FullDirectoryName = System.AppDomain.CurrentDomain.BaseDirectory + DirectoryName;
            if (Directory.Exists(FullDirectoryName) == false) Directory.CreateDirectory(FullDirectoryName);
            if (files.Count > 0)
            {
                string ExtensionName = Path.GetExtension(files[0].FileName).ToLower();
                string filename = Guid.NewGuid().ToString() + ExtensionName;

                TradeData.BaseService obj = new TradeData.BaseService();
                TradeModel.JC_Resource md = new TradeModel.JC_Resource();
                md.FileUrl = DirectoryName + "/" + filename;
                string FName = files[0].FileName;
                if (FName.Contains("\\"))
                    FName = FName.Substring(FName.LastIndexOf('\\') + 1);
                else
                    if (FName.Contains("/"))
                        FName = FName.Substring(FName.LastIndexOf('/') + 1);

                md.FileName = FName;
                md.FileKeyWord = FName;
                md.ExtType = ExtensionName;
                md.CreateTime = DateTime.Now;
                long fize = files[0].InputStream.Length;
                md.FileSize = fize.ToString();
                md.InUserId = 0;
                md.CompanyId = 0;
                int id =0;
                ErrorFollow.TraceWrite("上传文件", "JC_Resource:" + new JavaScriptSerializer().Serialize(md), DirectoryName);
                if (fize < 500000)
                {
                     id = obj.SaveResource(md);
                }


                var model = new { Id = id, FileName = FName, FileUrl = md.FileUrl, FileSize = files[0].InputStream.Length };
                
                string jsonString = new JavaScriptSerializer().Serialize(model);
                context.Response.Write(jsonString);
                if (width != null && height != null)
                {
                    string filepath = System.AppDomain.CurrentDomain.BaseDirectory + "ServerCookies/" + filename;
                    files[0].SaveAs(filepath);
                    Image.GetThumbnailImageAbort myCallback = new Image.GetThumbnailImageAbort(ThumbnailCallback);
                    Bitmap myBitmap = new Bitmap(filepath);
                    int thumbWidth = Convert.ToInt32(width);
                    int thumbHeight = Convert.ToInt32(height);
                    Image myThumbnail = myBitmap.GetThumbnailImage(thumbWidth, thumbHeight, myCallback, IntPtr.Zero);
                    Bitmap bmp1 = new Bitmap(myThumbnail);
                    string filepath2 = FullDirectoryName + "/" + filename;
                    bmp1.Save(filepath2, System.Drawing.Imaging.ImageFormat.Png);
                    bmp1.Dispose();
                    myBitmap.Dispose();
                    File.Delete(filepath);
                    ////20240716新增  如果文件保存的信息不存在，返回0告知
                    if (!File.Exists(filepath2))
                    {
                        context.Response.Clear();
                        context.Response.Write("0");
                    }
                    ////20240716end
                }
                else
                {
                    string filepath = FullDirectoryName + "/" + filename;
                    files[0].SaveAs(filepath);
                    ////20240716新增  如果文件保存的信息不存在，返回0告知
                    if (!File.Exists(filepath))
                    {
                        context.Response.Clear();
                        context.Response.Write("0");
                    }
                    ////20240716end
                }
                context.Response.End();
            }
            else
            {
                context.Response.Write("0");
            }


        }

        public bool ThumbnailCallback()
        {
            return false;
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}