64位程序调用32DLL解决方案
最近做一个.NETCore项目,需要调用以前用VB6写的老程序,原本想重写,但由于其调用了大量32DLL,重写后还需要编译为32位才能运行,于是干脆把老代码整个封装为32DLL,然后准备在64位程序中调用。(注意Windows系统中,先要把DLL注册为COM)
为了实现64位程序调用32DLL,我尝试了大量方法,但效果都不是很理想,偶然中发现.NetCore的“管道”,可以完美地解决这个问题,具体思路如下:
1、创建一个.NETFramework32位程序,在其中对封装的老代码进行引用(COM中引用),然后将其接口暴露
2、创建64位.NETCore程序,在其启动时,为第一步创建的程序创建进程,并启动
3、使用“双工管道”让64位程序与32程序进行通信,完美实现64位程序调用32DLL
下边代码展示一个简单的管道通信过程:
A、64程序代码
static void Main(string[] args) { //创建refpropPipe进程 Process process = new Process(); //将refpropPipe.exe放在与refprop64Hv相同路径下,相对路径引用 process.StartInfo.FileName = @"C:\Users\Administrator\source\repos\refpropPipe\refpropPipe\bin\Debug\refpropPipe.exe"; //process.StartInfo.FileName = "refpropPipe.exe"; process.Start(); double value = 0; //向refpropPipe发送调用信息,即查询输入变量值 using (NamedPipeClientStream pipeClientStream = new NamedPipeClientStream("request")) { pipeClientStream.Connect(); string input = Method + "," + FluidName + "," + InpCode + "," + Units + "," + Prop1 + "," + Prop2; using (StreamWriter writer = new StreamWriter(pipeClientStream)) { writer.WriteAsync(input); } } //接收refpropPipe返回的信息,即查询结果 using (NamedPipeClientStream pipeClientStream = new NamedPipeClientStream("respose")) { pipeClientStream.Connect(); using (StreamReader reader = new StreamReader(pipeClientStream)) { string val = reader.ReadToEnd(); value = Convert.ToDouble(val); } } process.WaitForExit(); process.Close(); }
B、32位程序代码
static void Main(string[] args) { double respose = 0; ///接收refprop64Hv的输入信息 using (NamedPipeServerStream pipeStream = new NamedPipeServerStream("request")) { pipeStream.WaitForConnection(); using (StreamReader reader = new StreamReader(pipeStream)) { //此处接收到消息后,对32Dll进行调用 } //向refprop64Hv返回结果 using (NamedPipeServerStream pipeStream = new NamedPipeServerStream("respose")) { pipeStream.WaitForConnection(); using (StreamWriter writer = new StreamWriter(pipeStream)) { string res = respose.ToString(); writer.WriteAsync(res); } }