使用Blueimp jQuery File Upload，在ASP.net中删除选择的图像

Question

在ASP.net Web表单中，并使用Blueimp jQuery文件Upload插件。

一切正常，但是当删除所选图像时，它会显示405方法不允许消息。

我也指定了deleteurl和deletetype，但它没有删除。

为此使用下面的处理程序代码。

public class GongosHandler : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/plain";//"application/json";
        var r = new System.Collections.Generic.List<ViewDataUploadFilesResult>();


        for (var x = 0; x < context.Request.Files.Count; x++)
        {
            HttpPostedFile hpf = context.Request.Files[x] as HttpPostedFile;
            string FileName = string.Empty;
            if (HttpContext.Current.Request.Browser.Browser.ToUpper() == "IE")
            {
                string[] files = hpf.FileName.Split(new char[] { '\\' });
                FileName = files[files.Length - 1];
            }
            else
            {
                FileName = hpf.FileName;
            }
            if (hpf.ContentLength == 0)
                continue;
            string savedFileName = context.Server.MapPath("~/images/" + FileName);
            try
            {
                hpf.SaveAs(savedFileName);
            }
            catch (Exception ex)
            {

            }


            var fileLength = new FileInfo(savedFileName).Length;

            r.Add(new ViewDataUploadFilesResult()
            {
                thumbnailUrl = savedFileName,
                name = FileName,
                length = hpf.ContentLength,
                type = hpf.ContentType,
                url = string.Format("/images/{0}", FileName),
                deleteUrl = string.Format("/images/{0}", FileName),
                deleteType = "DELETE",
                size = fileLength
            });
            var uploadedFiles = new
            {
                files = r.ToArray()
            };

            //was returning a new json string everytime, so then duplicating if 
            //sending multiple files. Example, file 1 was in first position,
            //then file 1 & 2 in second position, and so on. So, I only grab,
            //the last JSON instance to get all files.
            if (x == (context.Request.Files.Count - 1))
            {
                var jsonObj = JsonConvert.SerializeObject(uploadedFiles, Formatting.Indented);
                string jsonHttpOutputStream = jsonObj.ToString();

                context.Response.Write(jsonHttpOutputStream);
            }
        }

    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }

    public class ViewDataUploadFilesResult
    {
        public string thumbnailUrl { get; set; }
        public string name { get; set; }
        public int length { get; set; }
        public string type { get; set; }
        public string url { get; set; }
        public string deleteUrl { get; set; }
        public string deleteType { get; set; }
        public long size { get; set;  }
    }
}