关于引用dll产生类型初始值设定项引发异常的问题

rebornczs

从NI找到一个快速傅里叶变换的动态链接库，编写了一个函数用于计算；

[C#] 纯文本查看 复制代码

public static void FFTFunction(double[]waveform, int rateofsimpling,ref double[] x,ref double[] y)
         {
             int datasize = waveform.Length;
             int fftnumofSamples = datasize / 2;
             double[] xwaveform = new double[fftnumofSamples];
             double[] magnitudes = new double[datasize];
             double[] subsetOfMagnitudes = new double[fftnumofSamples];
             double[] phases = new double[datasize];
             double[] subsetOfPhases = new double[fftnumofSamples];
             NationalInstruments.ComplexDouble[] FFTValue = new NationalInstruments.ComplexDouble[datasize];
             FFTValue = NationalInstruments.Analysis.Dsp.Transforms.RealFft(waveform);
             NationalInstruments.ComplexDouble.DecomposeArrayPolar(FFTValue, out magnitudes, out phases);
             double scalingFactor = 1.0 / datasize;
             double deltafreq = rateofsimpling * scalingFactor;
             subsetOfMagnitudes[0] = magnitudes[0] * scalingFactor;
             for (int i = 1; i < fftnumofSamples; i++)
             {
                 xwaveform[i] = deltafreq * i;
                 subsetOfMagnitudes[i] = magnitudes[i] * scalingFactor * 2;
                 subsetOfPhases[i] = phases[i];
                 x[i] = xwaveform[i];
                 y[i] = subsetOfMagnitudes[i];
             }
         }

其次，Transforms类中如下：

[C#] 纯文本查看 复制代码

#region 程序集 NationalInstruments.Analysis.Enterprise.dll, v15.0.45.49153
// C:\Users\陈泽生\Desktop\TEST\test1\test1\bin\Debug\NationalInstruments.Analysis.Enterprise.dll
#endregion

using NationalInstruments;
using System;
using System.ComponentModel;

namespace NationalInstruments.Analysis.Dsp
{
    public sealed class Transforms
    {
        public static ComplexDouble[] ChirpZTransform(ComplexDouble[] inputData, ComplexDouble startingPoint, ComplexDouble increment, ChirpZTransformAlgorithm algorithm);
        public static ComplexDouble[] ChirpZTransform(double[] inputData, ComplexDouble startingPoint, ComplexDouble increment, ChirpZTransformAlgorithm algorithm);
        public static ComplexDouble[] ChirpZTransform(ComplexDouble[] inputData, ComplexDouble startingPoint, ComplexDouble increment, ChirpZTransformAlgorithm algorithm, int numberOfBins);
        public static ComplexDouble[] ChirpZTransform(double[] inputData, ComplexDouble startingPoint, ComplexDouble increment, ChirpZTransformAlgorithm algorithm, int numberOfBins);
        public static ComplexDouble[] CrossSpectrum(ComplexDouble[] inputXData, ComplexDouble[] inputYData);
        public static ComplexDouble[] CrossSpectrum(double[] inputXData, double[] inputYData);
        public static void CrossSpectrum(double[] inputXData, double[] inputYData, out double[] realData, out double[] imaginaryData);
        public static double[] DiscreteCosineTransform1D(double[] inputData);
        public static double[] DiscreteCosineTransform1D(double[] inputData, int dctSize);
        public static double[,] DiscreteCosineTransform2D(double[,] inputMatrix);
        public static double[] DiscreteSineTransform1D(double[] inputData);
        public static double[] DiscreteSineTransform1D(double[] inputData, int dstSize);
        public static double[,] DiscreteSineTransform2D(double[,] inputMatrix);
        public static void FastHartley(double[] data);
        public static void FastHilbert(double[] data);
        public static void Fft(ComplexDouble[] data);
        public static ComplexDouble[] Fft(ComplexDouble[] inputData, bool shiftDC);
        [EditorBrowsable(EditorBrowsableState.Never)]
        [Obsolete("Use an overload of this method to achieve the same functionality.")]
        public static void Fft(double[] realData, double[] imaginaryData);
        public static ComplexDouble[] Fft(ComplexDouble[] inputData, bool shiftDC, int fftSize);
        public static ComplexDouble[,] Fft2D(ComplexDouble[,] inputData, bool shiftDC);
        public static ComplexDouble[,] Fft2D(ComplexDouble[,] inputData, bool shiftDC, int rowsForFft, int columnsForFft);
        public static double[] ImpulseResponse(double[] stimulus, double[] response);
        public static ComplexDouble[] InverseChirpZTransform(ComplexDouble[] inputData, ComplexDouble startingPoint, ComplexDouble increment);
        public static ComplexDouble[] InverseChirpZTransform(ComplexDouble[] inputData, ComplexDouble startingPoint, ComplexDouble increment, int numberOfBins);
        public static double[] InverseDiscreteCosineTransform1D(double[] inputData);
        public static double[,] InverseDiscreteCosineTransform2D(double[,] inputMatrix);
        public static double[] InverseDiscreteSineTransform1D(double[] inputData);
        public static double[,] InverseDiscreteSineTransform2D(double[,] inputMatrix);
        public static void InverseFastHartley(double[] data);
        public static void InverseFastHilbert(double[] data);
        public static void InverseFft(ComplexDouble[] fft);
        public static ComplexDouble[] InverseFft(ComplexDouble[] fft, bool shiftDC);
        [EditorBrowsable(EditorBrowsableState.Never)]
        [Obsolete("Use an overload of this method to achieve the same functionality.")]
        public static void InverseFft(double[] realData, double[] imaginaryData);
        public static ComplexDouble[,] InverseFft2D(ComplexDouble[,] fft, bool shiftDC);
        public static double[] InverseRealFft(ComplexDouble[] fft);
        public static double[] InverseRealFft(ComplexDouble[] fft, bool shiftDC);
        [EditorBrowsable(EditorBrowsableState.Never)]
        [Obsolete("Use an overload of this method to achieve the same functionality.")]
        public static double[] InverseRealFft(double[] realData, double[] imaginaryData);
        public static double[,] InverseRealFft2D(ComplexDouble[,] fft, bool shiftDC);
        public static void NetworkFunctions(double[,] stimulus, double[,] response, double dt, out double[] crossPowerSpectrumMagnitude, out double[] crossPowerSpectrumPhase, out double[] frequencyResponseMagnitude, out double[] frequencyResponsePhase, out double[] coherence, out double[] impulseResponse, out double df);
        public static double[] PowerSpectrum(ComplexDouble[] data);
        public static void PowerSpectrum(double[] data);
        public static ComplexDouble[] RealFft(double[] realData);
        public static ComplexDouble[] RealFft(double[] realData, bool shiftDC);
        public static ComplexDouble[] RealFft(double[] realData, bool shiftDC, int fftSize);
        public static ComplexDouble[,] RealFft2D(double[,] realData, bool shiftDC);
        public static ComplexDouble[,] RealFft2D(double[,] realData, bool shiftDC, int rowsForFft, int columnsForFft);
    }
}

调用FFTFunction时，会报错：“System.TypeInitializationException”类型的未经处理的异常在 NationalInstruments.Analysis.Enterprise.dll 中发生

其他信息: “NationalInstruments.Analysis.Dsp.Transforms”的类型初始值设定项引发异常。
请问有人知道这个怎么解决吗？函数是放在一个public class里面的。

rebornczs

FFTFunction如上代码，有4个参数，第一个是输入数据（二维数组），第二个是整型，第三四个是输出数组，动态链接库为（NationalInstruments.Analysis.Enterprise.dll和NationalInstruments.Common.dll）

站长苏飞

看一下Dll的说明，应该会有说明那此是必须设置的