C# 在c中使用kernel32.dll缩短长文件路径名#

我正在尝试将长文件路径转换为短文件路径。尝试使用下面提到的kernel32.dll中可用的GetShortPathName的所有签名。但都返回一个空字符串，而不是一个短文件路径。在win 10的64位计算机上使用c#windows应用程序（.net framework 4.6.1）进行测试。请让我知道如何获取短文件路径。下面是我的代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using System.Runtime.InteropServices;

namespace WindowsFormsApp1
{
public partial class Form2 : Form
{
    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    static extern uint GetShortPathName(
    [MarshalAs(UnmanagedType.LPTStr)]
    string lpszLongPath,
    [MarshalAs(UnmanagedType.LPTStr)]
    StringBuilder lpszShortPath,
    uint cchBuffer);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    static extern uint GetShortPathName(string lpszLongPath, char[] lpszShortPath, int cchBuffer);


    [DllImport("kernel32.dll", CharSet = CharSet.Unicode, EntryPoint = "GetShortPathNameW", 
    SetLastError = true)]
    static extern int GetShortPathName(string pathName, System.Text.StringBuilder shortName, int 
    cbShortName);

    public Form2()
    {
        InitializeComponent();
    }

    private void Form2_Load(object sender, EventArgs e)
    {
        string longFilePath = @"C:\E\Authors files\GOLD\ddd Retail Leases\ddd Owned or Co-Owned Centres (including Property Income Fund Properties) – Managed by ddd\Garden City Booragoon (WA)\Specialty Leases & Deeds\Shop 12A\35120-#5337137, v1 _VICProduction1_ - Shop xxx - Garden City, Booragoon - D.C.K Australia Pty Ltd t_as Lovisa - Executed Deed of Assignment and Variation of Lease and Consent to Assignment   - WorkSite Acrobat Integration.pdf";


        string s1 = ShortPath(longFilePath);
         string s2=ToShortPathName(longFilePath);            
        string s3 = GetShortPathName(longFilePath);

    }

    public static string ToShortPathName(string longName)
    {
        uint bufferSize = 256;           
        StringBuilder shortNameBuffer = new StringBuilder((int)bufferSize);
        GetShortPathName(longName, shortNameBuffer, bufferSize);
        return shortNameBuffer.ToString();
    }

    public string ShortPath(string longpath)
    {
        char[] buffer = new char[256];
        GetShortPathName(longpath, buffer, buffer.Length);
        return new string(buffer);
    }

    public static string GetShortPathName(string longFileName)
    {           
        uint bufferSize = 256;                       
        StringBuilder shortNameBuffer = new StringBuilder((int)bufferSize);
        uint result = GetShortPathName(longFileName, shortNameBuffer, bufferSize);
        return shortNameBuffer.ToString();
    }

 }
}

---

这回答了你的问题吗？没有。上面的链接没有回答我的问题。它给出了同样的空值。如果有人能建议如何让它工作，请感谢。它只返回一个空值。不会抛出任何错误