UploadHandler.ashx.cs

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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;

namespace UploadEditPhoto
{
    /// <summary>
    /// 上传图片
    /// create by kingtentx
    /// 2014.11.14
    /// </summary>
    public class UploadHandler : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            try
            {
                if (context.Request.Files["photo"] == null)
                {
                    //图片控件中没有选择图片
                    context.Response.Write("{state:'error',msg:'请选择图片'}");
                }
                else
                {
                    HttpPostedFile imgFile= context.Request.Files["photo"];

                    if (imgFile.ContentLength > 1024 * 1000 * 2)//小于2M
                    {
                        context.Response.Write("{state:'error',msg:'上传图片不能超过2M'}");
                        return;
                    }

                    var filePath = "/Uploads/temp/"; //上传文件夹

                    string imageName = UpLoadImage(imgFile, filePath);
                    context.Response.Write("{state:'success',msg:'上传成功',path:'" + filePath + imageName + "'}");
                }
            }
            catch (Exception ex)
            {
                context.Response.Write("{state:'error',msg:'" + ex.Message + "'}");
            }
        }

        #region 上传图片
        /// <summary>
        /// 上传图片
        /// </summary>
        /// <param name="imgfile">文件http流</param>
        /// <param name="nowpath">所需放置的文件路径</param>
        /// <returns>上传成功，返回文件名，否则，抛出异常</returns>
        public static string UpLoadImage(HttpPostedFile imageFile, string filePath)
        {
            try
            {
                //string serverPath = System.Web.HttpContext.Current.Server.MapPath("~");