由于32位64位dll名称一直,所有的函数也是一直的,这样的话如何区分以及调用呢?
求指导。
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace Demo1
{
public partial class Form1 : Form
{
[DllImport(@"D:\demo\串口Demo\Demo1\Demo1\x64\ComMon.dll")]
private static extern int CM_DLLVersion();
[DllImport(@"D:\demo\串口Demo\Demo1\Demo1\x86\ComMon.dll")]
private static extern int CM_DLLVersion();
public Form1()
{
InitializeComponent();
}
}
}
一个方法是安装程序里根据CPU类型决定装32位还是64位版本,这样你代码里只要写DllImport ComMon.dll,CLR到应用程序目录下加载到的就是正确的版本。
另一个方法是32位和64位版本的DLL都装上,但是装到不同目录,DllImport 的时候还是直接写ComMon.dll,但是加载的时候自定义AppDomain.CurrentDomain.AssemblyResolve的处理来更改DLL搜索路径。
static void Main()
{
AppDomain.CurrentDomain.AssemblyResolve += AssemblyResolve;
……
private static Assembly AssemblyResolve(object sender, ResolveEventArgs args)
{
if (args.Name.StartsWith("ComMon.dll"))
{
string assemblyName = args.Name.Split(new[] { ',' }, 2)[0] + ".dll";
string archSpecificPath = Path.Combine(AppDomain.CurrentDomain.SetupInformation.ApplicationBase,
Environment.Is64BitProcess ? "x64" : "x86",
assemblyName);
return File.Exists(archSpecificPath)
? Assembly.LoadFile(archSpecificPath)
: null;
}
return null;
}
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace Demo1
{
public partial class Form1 : Form
{
[DllImport(@"D:\demo\串口Demo\Demo1\Demo1\x64\ComMon.dll")]
private static extern int CM_DLLVersion64();
[DllImport(@"D:\demo\串口Demo\Demo1\Demo1\x86\ComMon.dll")]
private static extern int CM_DLLVersion32();
public Form1()
{
InitializeComponent();
}
}
}
if (Environment.Is64BitOperatingSystem)
CM_DLLVersion64();;
else
CM_DLLVersion32();