Robert L. Parker和Philip B. Stark在Fortran中有一个代码：

福特兰

      subroutine bv(key, m, n, a, b, bl, bu, x, w, act, zz, istate,  loopA)
      implicit double precision (a-h, o-z)
!      x  is an unknown n-vector
!      a  is a given m by n matrix
!      b  is a given  m-vector 
!      bl is a given n-vector of lower bounds on the components of x.
!      bu is a given n-vector of upper bounds on the components of x.
!      key = 0
!   ---Output parameters:
!      x   the solution vector.
!      w(1)    the minimum 2-norm || a.x-b ||.
!  istate  vector indicating which components of  x  are active 
!  loopA   number of iterations taken in the main loop, Loop A.
!  ---Working  arrays:
!  w      dimension n.               act      dimension m*(mm+2). mm=min(m,n).
!  zz     dimension m.               istate   dimension n+1.

我试图从C＃中的dll调用该函数，例如：

C＃

class Program
{
    [DllImport("bv.dll", CallingConvention = CallingConvention.StdCall )]
    public static extern void bvls(
         int key, //key = 0, the subroutine solves the problem from scratch. If key > 0 the routine initializes using the user's guess about which components of  x  are `active'
         int m,
         int n,
        double[] a, //  m by n matrix
        double[] b, //  m-vector 
        double[] bl, //n-vector of lower bounds on the components of x.
        double[] bu, //n-vector of upper bounds on the components of x.
        ref double[] x, //unknown n-vector
        //Working  arrays:
        ref double[] w,  //dimension n
        double[] act, //dimension m*(mm+2). mm=min(m,n).
         double[] zz, //dimension m
        ref double[] istate, //dimension n+1.
        ref int loopA //   number of iterations taken in the main loop, Loop A.
        );
    
       
    static void Main(string[] args)
    {
        double[] a = new double[3 * 3] { //M*N
                  1.0, 10.0, 10.0,
                  2.0, 18.0, 16.0,
                  1.8, 69.0, 16.0
        };
        double[] b = new double[3]  {  //LDB*NRHS
             4.3, 6.8, 1.0,
        };
        double[] bl = new double[3];
        double[] bu = new double[3];
        double[] x = new double[3];
        double[] w = new double[3];
        double[] act = new double[3* 5];  //dimension m*(mm+2). mm=min(m,n).
        double[] zz = new double[3];
        double[] istate = new double[4];
        int loopA =0;
        Program.bv(0, 3, 3, a, b, bl, bu, ref x, ref w, act, zz, ref istate, ref loopA);
        for (int j = 0; j < 3; j++)
            Console.Write(" \t" + x[j]);
            
    }
}

但是在执行代码时我得到

EntryPointNotFoundException: Entry point was not found. in 'bv' on file 'bv.dll'.
    myProject.Program.bv(Int32 key, Int32 m, Int32 n, Double[] a, Double[] b, Double[] bl, Double[] bu, Double[]& x, Double[]& w, Double[] act, Double[] zz, Double[]& istate, Int32& loopA)

基本上我有两个问题，如何使它起作用？和其他问题，它是否正确我定义函数的方式

 [DllImport("bv.dll", CallingConvention = CallingConvention.StdCall )]
            public static extern void bvls(...)

基于fortran代码的常规信息？

使用依赖行者时，我得到：

我怀疑dll不正确并且没有例程，是否可以检查dll是否以正确的方式生成？

更新

在尝试了ILSpy之后，我得到了以下提示似乎不正确，您能否建议如何正确生成dll文件？，ILSpy是否告诉bvlsFortran是我应使用的函数？我尝试过，但无法正常工作