package main
import "C"
import "fmt"
//export PrintBye
func PrintBye() {
fmt.Println("From DLL: Bye!")
}
//export Sum
func Sum(a int, b int) int {
return a + b;
}
func main() {
// Need a main function to make CGO compile package as C shared library
}
編譯成 DLL 文件:
go build -buildmode=c-shared -o exportgo.dll exportgo.go
編譯後得到 exportgo.dll 和 exportgo.h 兩個文件。
參考 exportgo.h 文件中的函數定義,撰寫 C# 文件 importgo.cs:
using System;
using System.Runtime.InteropServices;
namespace HelloWorld
{
class Hello
{
[DllImport("exportgo.dll", EntryPoint="PrintBye")]
static extern void PrintBye();
[DllImport("exportgo.dll", EntryPoint="Sum")]
static extern int Sum(int a, int b);
static void Main()
{
Console.WriteLine("Hello World!");
PrintBye();
Console.WriteLine(Sum(33, 22));
}
}
}
編譯 CS 文件得到 exe
csc importgo.cs
將 exe 和 dll 放在同一目錄下,運行。
>importgo.exe
Hello World!
From DLL: Bye!
55
補充:
golang 中的 string 參數在 C# 中可以如下引用:
public struct GoString
{
public string Value { get; set; }
public int Length { get; set; }
public static implicit operator GoString(string s)
{
return new GoString() { Value = s, Length = s.Length };
}
public static implicit operator string(GoString s) => s.Value;
}