项目--ajax上传文件（本次是图片）（.net）

<script type="text/javascript">
          function ajaxFileUpload(){
               $.ajaxFileUpload({
                    url:‘ajax/UploadImage.ashx‘,            //需要链接到服务器地址
                    secureuri: false,
                    fileElementId:‘houseMaps‘,                        //文件选择框的id属性
                    dataType: ‘JSON‘,                                     //服务器返回的格式，可以是json
                    success: function (data, status)            //相当于java中try语句块的用法
                    { 
                        //alert(data);  
                        if(data.length > 0){
                            $("#Photo").val(data);
                            $("#btnUpload").val("已上传");
                            alert("成功!");
                        }
                        else{
                            $("#Photo").val("");
                             $("#btnUpload").val("上传");
                            alert("失败!");
                        }
                    },
                    error: function (data, status, e)            //相当于java中catch语句块的用法
                    {
                        alert("失败");
                        //$(‘#result‘).html(‘添加失败‘);
                    }
                });
          }
      </script>

context.Response.ContentType = "text/html";
        
        HttpFileCollection files = context.Request.Files;
        string msg = string.Empty;
        string error = string.Empty;
        string imgurl;
        try
        {
            if (files.Count > 0)
            {
                //files[0].SaveAs(Server.MapPath("/") + System.IO.Path.GetFileName(files[0].FileName));

                string filePath = AppDomain.CurrentDomain.BaseDirectory + @"Admin\ApplyImage\";
                string filename = files[0].FileName;
                //检测文件名称
                if (filename.ToLower().Contains(".jpg") || filename.ToLower().Contains(".gif") ||
                filename.ToLower().Contains(".bmp"))
                {
                    //改文件名
                    int index = filename.LastIndexOf(".");
                    string lastName = filename.Substring(index, filename.Length - index);
                    //新文件名称,以时间年月日时分秒作为文件名
                    string newfile = DateTime.Now.ToString("yyyyMMddhhmmss") + lastName;
                    files[0].SaveAs(filePath + newfile);

                    //msg = " 成功! 文件大小为:" + files[0].ContentLength;
                    //imgurl = "/" + files[0].FileName;
                    //string res = "{ error:‘" + error + "‘, msg:‘" + msg + "‘,imgurl:‘" + imgurl + "‘}";
                    //string res = "{error:‘‘,msg:‘成功‘}";
                    context.Response.Write(newfile);
                    context.Response.End();
                }
                else
                {
                    context.Response.Write("");
                    context.Response.End();
                }
            }
        }
        catch
        {
            context.Response.Write("");
            context.Response.End();
        }