问题描述
因此,我按照教程使用 ASP.net 核心将文件上传"到本地路径,这是代码:
So, i followed a tutorial to "upload" files to a local path using ASP.net core,this is the code:
public IActionResult About(IList<IFormFile> files)
{
foreach (var file in files)
{
var filename = ContentDispositionHeaderValue
.Parse(file.ContentDisposition)
.FileName
.Trim('"');
filename = hostingEnv.WebRootPath + $@"{filename}";
using (FileStream fs = System.IO.File.Create(filename))
{
file.CopyTo(fs);
fs.Flush();
}
}
return View();
}
我想读取文件(文件元数据)的扩展属性,例如:
I want to read the extended properties of a file (file metadata)like:
- 姓名,
- 作者,
- 发布日期,
- 等
并使用此数据对文件进行排序,有没有使用 Iformfile 的方法?
and to sort the files using this data, is there a way using Iformfile?
推荐答案
如果您想访问更多文件元数据,那么 .NET 框架提供 ootb,我猜您需要使用第三方库.否则,您需要编写自己的 COM 包装器来访问这些详细信息.
If you want to access more file metadata then the .NET framework provides ootb, I guess you need to use a third party library.Otherwise you need to write your own COM wrapper to access those details.
有关纯 C# 示例,请参阅此链接.
这是一个如何读取文件属性的示例:
将Windows/System32"文件夹中对 Shell32.dll 的引用添加到你的项目
List<string> arrHeaders = new List<string>();
List<Tuple<int, string, string>> attributes = new List<Tuple<int, string, string>>();
Shell32.Shell shell = new Shell32.Shell();
var strFileName = @"C:UsersAdminGoogle Driveimage.jpg";
Shell32.Folder objFolder = shell.NameSpace(System.IO.Path.GetDirectoryName(strFileName));
Shell32.FolderItem folderItem = objFolder.ParseName(System.IO.Path.GetFileName(strFileName));
for (int i = 0; i < short.MaxValue; i++)
{
string header = objFolder.GetDetailsOf(null, i);
if (String.IsNullOrEmpty(header))
break;
arrHeaders.Add(header);
}
// The attributes list below will contain a tuple with attribute index, name and value
// Once you know the index of the attribute you want to get,
// you can get it directly without looping, like this:
var Authors = objFolder.GetDetailsOf(folderItem, 20);
for (int i = 0; i < arrHeaders.Count; i++)
{
var attrName = arrHeaders[i];
var attrValue = objFolder.GetDetailsOf(folderItem, i);
var attrIdx = i;
attributes.Add(new Tuple<int, string, string>(attrIdx, attrName, attrValue));
Debug.WriteLine("{0} {1}: {2}", i, attrName, attrValue);
}
Console.ReadLine();
您可以丰富此代码以创建自定义类,然后根据需要进行排序.
You can enrich this code to create custom classes and then do sorting depending on your needs.
有许多付费版本,但有一个免费版本,名为 WindowsApiCodePack
There are many paid versions out there, but there is a free one called WindowsApiCodePack
例如访问图像元数据,我认为它支持
For example accessing image metadata, I think it supports
ShellObject picture = ShellObject.FromParsingName(file);
var camera = picture.Properties.GetProperty(SystemProperties.System.Photo.CameraModel);
newItem.CameraModel = GetValue(camera, String.Empty, String.Empty);
var company = picture.Properties.GetProperty(SystemProperties.System.Photo.CameraManufacturer);
newItem.CameraMaker = GetValue(company, String.Empty, String.Empty);
这篇关于如何读取扩展文件属性/文件元数据的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!