asp.net后台InputStream存储图片，前台js接收解析存放路径地址

///后台代码
public Hashtable HtFilePath
{
get
{
if (ViewState["HtFilePath"] == null)
{
Hashtable ht = new Hashtable();
ht.Add("filefirst", "");
ht.Add("filesecond", "");
ht.Add("filethird", "");
ViewState["HtFilePath"] = ht;
}

return (Hashtable)ViewState["HtFilePath"];
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack) 
{
if (Request["waybillID"] != null) 
{
Session["waybillID"] = Request["waybillID"];
Session.Timeout = 30;
string waybillID = Session["waybillID"].ToString();
}
if (!string.IsNullOrEmpty(Session["waybillID"].ToString()))
{
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "SayHello", "<script>GetWaybillDetail('" + Session["waybillID"].ToString() + "','jsServer')</script>");
}
}
if (IsPostBack)
{
var sleDutyGenre = Request.Form["sleDutyGenre"];
var sleDutyType = Request.Form["sleDutyType"];
var sleDutyLink = Request.Form["sleDutyLink"];
var txtComplainContent = Request.Form["txtComplainContent"];
var txtHiddenWaybillID = Request.Form["txtHiddenWaybillID"];
var txtAcceptPeople = Request.Form["txtAcceptPeople"];
Hashtable complaint = new Hashtable();
complaint.Add("DutyGenre", sleDutyGenre);
complaint.Add("DutyType", sleDutyType);
complaint.Add("DutyLink", sleDutyLink);
complaint.Add("ComplainContent", txtComplainContent);
complaint.Add("WaybillID", txtHiddenWaybillID);
complaint.Add("AcceptPeople", txtAcceptPeople);
complaint.Add("picPath", "");
if (!string.IsNullOrEmpty(this.fileFirst.Value))
{
HttpPostedFile httpPostedFile = this.fileFirst.PostedFile;
Image image = new Bitmap(httpPostedFile.InputStream);
image = Resize(image, 800, 600, true);
string fileName = string.Format("{0}_{1}.jpeg", GetFileName(httpPostedFile.FileName), DateTime.Now.ToString("yyyyMMddhhmmssfff"));
string relativeFilePath = ConfigurationManager.AppSettings["QualityFeedbackDir"] + fileName;
string saveFilePath = HttpContext.Current.Server.MapPath(relativeFilePath);
SaveMap(image, saveFilePath, true);
HtFilePath[this.fileUploadName.Value.ToLower()] = relativeFilePath;
complaint["picPath"] = relativeFilePath;
}
string complaints = SerializerUtility.JsonSerializeByJNet(complaint);
ClientScript.RegisterStartupScript(this.GetType(), Guid.NewGuid().ToString(), string.Format("setPicturePath('{0}','{1}');", "[" + SerializerUtility.JsonSerializeByJNet(HtFilePath) + "]",complaints), true);
}
}
private string GetFileName(string strFilePath)
{
if (strFilePath == null)
return string.Empty;
string fileName = strFilePath.Split('\\').ToList().Last();
return fileName.Substring(0, fileName.LastIndexOf('.'));
}


/// <summary> 
/// 缩放图片 
/// </summary> 
/// <param name="image">Image 对象</param> 
/// <param name="width">图片新的宽度</param> 
/// <param name="height">图片新高度</param> 
/// <param name="scale">是否按比例缩放图片</param> 
/// <returns>Image 对象</returns> 
public Image Resize(Image image, int width, int height, bool scaleable)
{
// 定义图片的新尺寸 
int iWidth, iHeight;

// 如果是按比例缩放图片(即scaleable = true)，生成的图片的尺寸以不超过指定尺寸为准，否则以绝对尺寸为准 
if (scaleable)
{
if (image.Width > image.Height)
{
iWidth = width;
iHeight = image.Height * iWidth / image.Width;
}
else
{
iHeight = height;
iWidth = image.Width * iHeight / image.Height;
}
}
else
{
iWidth = width;
iHeight = height;
}

Rectangle r = new Rectangle(0, 0, iWidth, iHeight);
Image img = new Bitmap(iWidth, iHeight);
using (Graphics g = Graphics.FromImage(img))
{
// 定义缩放图片为高质量 
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighSpeed;
//g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed; 
g.DrawImage(image, r);
}
return img;
}

public string SaveMap(Image image, string filePath, bool compressible)
{
if (compressible)
{
ImageCodecInfo ici = ImageCodecInfo.GetImageEncoders().Where(p => p.MimeType.ToLower() == "image/jpeg").FirstOrDefault();
EncoderParameters ep = new EncoderParameters();
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, Convert.ToInt32(40)); //这里最后一个参数,需要注意,即使给的参数是整数,也必须要转成Int32,否则会被默认为byte类型!
image.Save(filePath, ici, ep);
}
else
{
image.Save(filePath);
}
return filePath;
}

前台脚本函数

function setPicturePath(data, cp) {
            var complaint = eval('(' + cp + ')');
            var picPath = complaint.picPath;
            var complaint = {
                "DutyGenre": complaint.DutyGenre,
                "DutyType": complaint.DutyType,
                "DutyLink": complaint.DutyLink,
                "ComplainContent": complaint.ComplainContent,
                "WaybillID": complaint.WaybillID,
                "ComplainPeople": complaint.ComplainPeople,
                "AcceptPeople": complaint.AcceptPeople
            };
            $.post("Handler/CctComplaintHandler.ashx?action=CreateComplaint&temp=" + new Date().getTime(),
            {
                "complaint": JSON.stringify(complaint), "picPath": picPath
            }, function (data) {
                var jsonData = eval(data)[0];
                if (jsonData.State == "0") {
                    $.ligerDialog.success(jsonData.Desc, "", function () {
                    }, false);
                }
                else {
                    $.ligerDialog.error(jsonData.Desc);
                }
            })
        }