ERP/TradeManage/GlobalAshx/AjaxFileUpdate.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;

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

		public void ProcessRequest(HttpContext context)
		{
            //context.Response.ContentType = "text/plain";
            //context.Response.Charset = "utf-8";

			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";
			DirectoryName = System.AppDomain.CurrentDomain.BaseDirectory + DirectoryName;
			if (Directory.Exists(DirectoryName) == false) Directory.CreateDirectory(DirectoryName);
			if (files.Count > 0)
			{
				string ExtensionName = Path.GetExtension(files[0].FileName).ToLower();
				string filename = Guid.NewGuid().ToString() + ExtensionName;
				var model = new { FileName = filename, 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 = DirectoryName + "/" + 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 = DirectoryName + "/" + 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;
			}
		}
	}
}