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Set DllImport Effects
原标题:Set DllImport attribute dynamically
  • 时间:2010-05-12 10:44:35
  •  标签:
  • c#
  • pinvoke

我正在使用PInvoke和DllImport属地,使用外部未经管理的损失。 例如。

[DllImport("mcs_apiD.dll", CharSet = CharSet.Auto)]
private static extern byte start_api(byte pid, byte stat, byte dbg, byte ka);

我很想知道,如果想利用另一个版本的弹道,是否有可能以某种方式改变弹道档案细节(例如:mcs_apiD.dll)

问题回答

是的,你必须完成P/Invoke marshaller所做的部分工作。 移至DLL并找到出口功能的切入点。 首先是申报其签名与出口职能相符的代表:

 private delegate byte start_api(byte pid, byte stat, byte dbg, byte ka);

然后使用这样的法典:

 using System.ComponentModel;
 using System.Runtime.InteropServices;
  ...

    static IntPtr dllHandle;
  ...
        if (dllHandle == IntPtr.Zero) {
            dllHandle = LoadLibrary("mcs_apiD.dll");
            if (dllHandle == IntPtr.Zero) throw new Win32Exception();
        }
        IntPtr addr = GetProcAddress(dllHandle, "_start_api@16");
        if (addr == IntPtr.Zero) throw new Win32Exception();
        var func = (start_api)Marshal.GetDelegateForFunctionPointer(addr, typeof(start_api));
        var retval = func(1, 2, 3, 4);
  ...
    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr LoadLibrary(string name);
    [DllImport("kernel32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
    private static extern IntPtr GetProcAddress(IntPtr hModule, string name);

当然,如何纠正这一错误。 请注意,你必须使用利比里亚国防部队的实际出口名称,你不再得到P/Invoke marshaller的帮助,帮助填写国名。 如果你无法确定出口名称如何,则使用DLL。

您可以更改批次的名称,但您可以改变正在装上图书馆的道路(如从登记处或组合档案中读取),并人工装上<代码>LoadLibrary kernel32 s功能:。 我的回答是





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