Question

c# 如何实现委托执行

我手头上有一个做项目的短程序，用vb.net写的，我现在没有能力翻译成c#，c#能力一般，主要是里面有几段代码不知道怎么改。具体如下：
Solver.FunctionEvaluator = AddressOf FunctionValue//这段会回调FunctionValue这个函数。c#不知道怎么写，能力有限。
Dim Par As New Microsoft.SolverFoundation.Solvers.NelderMeadSolverParams
Dim Solution = Solver.Solve(Par)

Function FunctionValue(Model As Microsoft.SolverFoundation.Services.INonlinearModel, rowVid As Integer, Values As Microsoft.SolverFoundation.Services.ValuesByIndex, newValues As Boolean) As Object
Dim vTransX, vTransY, vAngle As Double

vTransX = Values(Model.GetIndexFromKey("xtrans"))
vTransY = Values(Model.GetIndexFromKey("ytrans"))
vAngle = Values(Model.GetIndexFromKey("angle"))

For i = 1 To vNumPins
'calculate new locations
aNewX(i) = aActualX(i) * Math.Cos(vAngle) - aActualY(i) * Math.Sin(vAngle) + vTransX
aNewY(i) = aActualX(i) * Math.Sin(vAngle) + aActualY(i) * Math.Cos(vAngle) + vTransY
'calculate distance from new locations to spec limits
aUSLX(i) = (aNomX(i) + aLTX(i)) - aNewX(i)
aOSLX(i) = aNewX(i) - (aNomX(i) + aUTX(i))
aUSLY(i) = (aNomY(i) + aLTY(i)) - aNewY(i)
aOSLY(i) = aNewY(i) - (aNomY(i) + aUTY(i))
Next i

'calculate maximum distance from new locations to spec limits
FunctionValue = -1000000000 'initialize value
For i = 1 To vNumPins
If aUSLX(i) > FunctionValue Then FunctionValue = aUSLX(i)
If aOSLX(i) > FunctionValue Then FunctionValue = aOSLX(i)
If aUSLY(i) > FunctionValue Then FunctionValue = aUSLY(i)
If aOSLY(i) > FunctionValue Then FunctionValue = aOSLY(i)
Next i

Return FunctionValue

End Function

各位高手帮忙看看，谢谢！
按照楼下说的，我在前面加了委托
public delegate double Functionvvv(INonlinearModel Model, int rowVid, ValuesByIndex Values, bool newValues,double dreturn);
然后在这段里面加
Functionvvv methodCall = Functionvalue;
Solver.FunctionEvaluator = methodCall.Invoke;
没有报错，但是在
NelderMeadSolverParams Par = new NelderMeadSolverParams();
ILinearSolution Solutions =(ILinearSolution)Solver.Solve(Par);//这段里面报错，我估计还是我的委托没写好，楼下的写法我没写成功，类型不知道怎么加进去，哎，能力有限，对自己无语！后面的委托函数（Functionvalue）没有执行。

Answer 1

C# 声明个委托，再调用Invoke就行了
可以将委托指向一个写好的方法，也可以用lambda表达式动态声明委托。
Func<int> method=()=>Convert.ToInt32("5");
int result=method.Invoke();

追问

Func<INonlinearModel, int, ValuesByIndex, bool, double> methodCall = () =>Functionvalue;

Solver.FunctionEvaluator = methodCall.Invoke();

类型不匹配，主要是微软这个函数的类似不知道和这个Functionvalue 怎么对的上，帮忙看下，谢谢！