我在 mvc 4 中工作并尝试实现 jquery 文件上传器。
但是在我的 FileStatus 类和 UploadHandler 中给了我几个错误。
-namespace FileStatus 找不到，
-方法 FileStatus 需要一个返回类型。
我有一个例子，已经看到方法 FileStatus 不返回任何东西，
我不知道发生了什么事。。
有人可以帮忙吗？
文件状态类
public class FileStatus
{
public const string HandlerPath = "/Upload/";
public string group { get; set; }
public string name { get; set; }
public string type { get; set; }
public int size { get; set; }
public string progress { get; set; }
public string url { get; set; }
public string thumbnail_url { get; set; }
public string delete_url { get; set; }
public string delete_type { get; set; }
public string error { get; set; }
public FilesStatus() { }
public FilesStatus(FileInfo fileInfo) { SetValues(fileInfo.Name, (int)fileInfo.Length, fileInfo.FullName); }
public FilesStatus(string fileName, int fileLength, string fullPath) { SetValues(fileName, fileLength, fullPath); }
private void SetValues(string fileName, int fileLength, string fullPath)
{
name = fileName;
type = "image/png";
size = fileLength;
progress = "1.0";
url = HandlerPath + "UploadHandler.ashx?f=" + fileName;
delete_url = HandlerPath + "UploadHandler.ashx?f=" + fileName;
delete_type = "DELETE";
var ext = Path.GetExtension(fullPath);
var fileSize = ConvertBytesToMegabytes(new FileInfo(fullPath).Length);
if (fileSize > 3 || !IsImage(ext)) thumbnail_url = "/Content/img/generalFile.png";
else thumbnail_url = @"data:image/png;base64," + EncodeFile(fullPath);
}
private bool IsImage(string ext)
{
return ext == ".gif" || ext == ".jpg" || ext == ".png";
}
private string EncodeFile(string fileName)
{
return Convert.ToBase64String(System.IO.File.ReadAllBytes(fileName));
}
static double ConvertBytesToMegabytes(long bytes)
{
return (bytes / 1024f) / 1024f;
}
}
上传处理程序
public class UploadHandler : IHttpHandler
{
private readonly JavaScriptSerializer js;
private string StorageRoot
{
get { return Path.Combine(System.Web.HttpContext.Current.Server.MapPath("~/Files/")); } //Path should! always end with '/'
}
public UploadHandler()
{
js = new JavaScriptSerializer();
js.MaxJsonLength = 41943040;
}
public bool IsReusable { get { return false; } }
public void ProcessRequest(HttpContext context)
{
context.Response.AddHeader("Pragma", "no-cache");
context.Response.AddHeader("Cache-Control", "private, no-cache");
HandleMethod(context);
}
// Handle request based on method
private void HandleMethod(HttpContext context)
{
switch (context.Request.HttpMethod)
{
case "HEAD":
case "GET":
if (GivenFilename(context)) DeliverFile(context);
else ListCurrentFiles(context);
break;
case "POST":
case "PUT":
UploadFile(context);
break;
case "DELETE":
DeleteFile(context);
break;
case "OPTIONS":
ReturnOptions(context);
break;
default:
context.Response.ClearHeaders();
context.Response.StatusCode = 405;
break;
}
}
private static void ReturnOptions(HttpContext context)
{
context.Response.AddHeader("Allow", "DELETE,GET,HEAD,POST,PUT,OPTIONS");
context.Response.StatusCode = 200;
}
// Delete file from the server
private void DeleteFile(HttpContext context)
{
var filePath = StorageRoot + context.Request["f"];
if (File.Exists(filePath))
{
File.Delete(filePath);
}
}
// Upload file to the server
private void UploadFile(HttpContext context)
{
var statuses = new List<FilesStatus>();
var headers = context.Request.Headers;
if (string.IsNullOrEmpty(headers["X-File-Name"]))
{
UploadWholeFile(context, statuses);
}
else
{
UploadPartialFile(headers["X-File-Name"], context, statuses);
}
WriteJsonIframeSafe(context, statuses);
}
// Upload partial file
private void UploadPartialFile(string fileName, HttpContext context, List<FilesStatus> statuses)
{
if (context.Request.Files.Count != 1) throw new HttpRequestValidationException("Attempt to upload chunked file containing more than one fragment per request");
var inputStream = context.Request.Files[0].InputStream;
var fullName = StorageRoot + Path.GetFileName(fileName);
using (var fs = new FileStream(fullName, FileMode.Append, FileAccess.Write))
{
var buffer = new byte[1024];
var l = inputStream.Read(buffer, 0, 1024);
while (l > 0)
{
fs.Write(buffer, 0, l);
l = inputStream.Read(buffer, 0, 1024);
}
fs.Flush();
fs.Close();
}
statuses.Add(new FilesStatus(new FileInfo(fullName)));
}
// Upload entire file
private void UploadWholeFile(HttpContext context, List<FilesStatus> statuses)
{
for (int i = 0; i < context.Request.Files.Count; i++)
{
var file = context.Request.Files[i];
var fullPath = StorageRoot + Path.GetFileName(file.FileName);
file.SaveAs(fullPath);
string fullName = Path.GetFileName(file.FileName);
statuses.Add(new FilesStatus(fullName, file.ContentLength, fullPath));
}
}
private void WriteJsonIframeSafe(HttpContext context, List<FilesStatus> statuses)
{
context.Response.AddHeader("Vary", "Accept");
try
{
if (context.Request["HTTP_ACCEPT"].Contains("application/json"))
context.Response.ContentType = "application/json";
else
context.Response.ContentType = "text/plain";
}
catch
{
context.Response.ContentType = "text/plain";
}
var jsonObj = js.Serialize(statuses.ToArray());
context.Response.Write(jsonObj);
}
private static bool GivenFilename(HttpContext context)
{
return !string.IsNullOrEmpty(context.Request["f"]);
}
private void DeliverFile(HttpContext context)
{
var filename = context.Request["f"];
var filePath = StorageRoot + filename;
if (File.Exists(filePath))
{
context.Response.AddHeader("Content-Disposition", "attachment; filename=\"" + filename + "\"");
context.Response.ContentType = "application/octet-stream";
context.Response.ClearContent();
context.Response.WriteFile(filePath);
}
else
context.Response.StatusCode = 404;
}
private void ListCurrentFiles(HttpContext context)
{
var files =
new DirectoryInfo(StorageRoot)
.GetFiles("*", SearchOption.TopDirectoryOnly)
.Where(f => !f.Attributes.HasFlag(FileAttributes.Hidden))
.Select(f => new FilesStatus(f))
.ToArray();
string jsonObj = js.Serialize(files);
context.Response.AddHeader("Content-Disposition", "inline; filename=\"files.json\"");
context.Response.Write(jsonObj);
context.Response.ContentType = "application/json";
}
}
对于 UploadHandler 我使用这个：
使用系统；
使用 System.Collections.Generic；
使用 System.Linq；
使用 System.Web；
使用 System.IO；
使用 System.Web.Script.Serialization；
对于文件类：
使用系统；
使用 System.Collections.Generic；
使用 System.Linq；
使用 System.Web；
使用 System.IO；
我知道它有很多代码，对此感到抱歉，但我认为最好向您展示所有代码。
在此先感谢您的帮助。