F＃沒有價值的會員

Question

我正在嘗試將以下C＃代碼轉換為F＃：

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
private class DOCINFOA
{
    [MarshalAs(UnmanagedType.LPStr)]
    public string nomeDocumento;
    [MarshalAs(UnmanagedType.LPStr)]
    public string arquivoSaida;
    [MarshalAs(UnmanagedType.LPStr)]
    public string tipoDado;
}

我正在做以下事情：

namespace Printer
    module RawPrinterHelper =
            [<StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)>]
            type DOCINFOA =
                [<MarshalAs(UnmanagedType.LPStr)>]
                member this.nomeDocumento
                [<MarshalAs(UnmanagedType.LPStr)>]
                member this.arquivoSaida
                [<MarshalAs(UnmanagedType.LPStr)>]
                member this.tipoDado

但我收到： A type definition requires one or more members 。 我可以讓這些成員空着嗎？

Answer 1

您可以使用val而不是member ：

[<StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)>]
type DOCINFOA =
    [<MarshalAs(UnmanagedType.LPStr)>]
    val nomeDocumento : string
    [<MarshalAs(UnmanagedType.LPStr)>]
    val arquivoSaida : string
    [<MarshalAs(UnmanagedType.LPStr)>]
    val tipoDado : string