C# 获取文件扩展信息-应用名称/作者等

方案一：使用微乳封装的Shell包

添加nuget包：Microsoft.WindowsAPICodePack.Shell

using Microsoft.WindowsAPICodePack.Shell;
using Microsoft.WindowsAPICodePack.Shell.PropertySystem;

1    string filePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "需求文档_迭代版_036.docx");
            var file = ShellFile.FromFilePath(filePath);

            //Read and Write:

            string[] oldAuthors = file.Properties.System.Author.Value;
            string oldTitle = file.Properties.System.Title.Value;
            var orgAppName = file.Properties.System.ApplicationName;

            file.Properties.System.Author.Value = new string[] { "Author #1", "Author #2" };
            file.Properties.System.Title.Value = "Example Title";

            // Alternate way to Write:

            ShellPropertyWriter propertyWriter = file.Properties.GetPropertyWriter();
            propertyWriter.WriteProperty(SystemProperties.System.Author, new string[] { "Author" });
            propertyWriter.Close();

2  直接使用Shell32交互

添加Com组件引用：

            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 = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "需求文档_迭代版_036.docx");

            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();

 参考资料：

https://stackoverflow.com/questions/37869388/how-to-read-extended-file-properties-file-metadata

https://stackoverflow.com/questions/220097/read-write-extended-file-properties-c/2096315#2096315

https://stackoverflow.com/questions/24081665/windows-api-code-pack-where-is-it

https://www.codeproject.com/Articles/5036/ID3-Tag-Reader-Using-Shell-Functions

Windows API Code Pack 1.1.zip

https://github.com/jamie-pate/KeepSync/blob/master/contrib/Windows%20API%20Code%20Pack%201.1.zip