winapi - f# 中的 Win32 api 调用错误 GetShortPathName

Question

我可以让此代码在交互式环境中运行，但当我从调试器或 .exe 文件运行代码时，它会崩溃

忘记错误:检测到 FatalExecutionEngineError!运行时遇到 fatal error 。错误的地址位于线程 0x1104 上的 0x6c9781b0。错误代码为0xc0000005。此错误可能是 CLR 中的错​​误或用户代码的不安全或不可验证部分中的错误。此错误的常见来源包括 COM 互操作或 PInvoke 的用户编码错误，这可能会损坏堆栈。

使用.net 4.5

open System.IO
open System.Runtime.InteropServices
open System.Text

[<DllImport("kernel32.dll",CharSet = CharSet.Auto, SetLastError=true)>]
extern uint32 GetShortPathName(
    [<MarshalAs(UnmanagedType.LPWStr)>] string longpath, 
    [<MarshalAs(UnmanagedType.LPWStr)>] StringBuilder shortpath, 
    [<MarshalAs(UnmanagedType.U4)>] uint32  item)

let MakeShortName(longPath : string) =
    let sb =  StringBuilder()
    let currPath = longPath
    let item = 1024u

   // let blah = ""
    //win32 assigns shortPath
    let blah32 = GetShortPathName(currPath, sb, item)

    sb.ToString()

[<EntryPoint>]
let main argv = 

    let path = @"C:\dev\shortName\shortName"
    let shorty = MakeShortName path
    printfn "%s" shorty 
    let x = System.Console.ReadKey()

    0

交互式环境

<小时/>

$(我alt+输入以上两个函数)

val GetShortPathName : 字符串 * StringBuilder * uint32 -> uint32val MakeShortName : 字符串 -> 字符串

$ MakeShortName @"C:\dev\shortName\shortName";;val it : string = "C:\dev\SHORTN~1\SHORTN~1"

Answer 1

已修复。

我只是烂@ win 32

删除编码(marshal)

查看解决方案:

open System.IO
open System.Runtime.InteropServices
open System.Text

[<DllImport("kernel32.dll",CharSet = CharSet.Auto, SetLastError=true)>]
extern int GetShortPathName(
    string longpath, 
    StringBuilder shortpath, 
    int  item)

let MakeShortName(longPath : string) =
    let sb =  StringBuilder()
    let currPath = longPath
    let item = 1024

   // let blah = ""
//win32 assigns shortPath
    let blah32 = GetShortPathName(currPath, sb, item)

    sb.ToString()

[<EntryPoint>]
let main argv = 

let path = @"C:\dev\shortName\shortName"
let shorty = MakeShortName path
printfn "%s" shorty 
let x = System.Console.ReadKey()

0