我希望将实时信号从情绪传递到八度音 我试着为octave写一个c＃包装器。这是代码。
namespace LibSharpTave {
public class Octave {
Process OctaveProcess { get; set; }
private string OctaveEchoString { get; set; }
public Octave(string PathToOctaveBinaries) {
StartOctave(PathToOctaveBinaries, false);
}
public Octave(string PathToOctaveBinaries, bool CreateWindow) {
StartOctave(PathToOctaveBinaries, CreateWindow);
}
string ptob;
bool cw;
private void StartOctave(string PathToOctaveBinaries, bool CreateWindow) {
ptob = PathToOctaveBinaries;
cw = CreateWindow;
this.OctaveEchoString = Guid.NewGuid().ToString();
OctaveProcess = new Process();
ProcessStartInfo pi = new ProcessStartInfo();
if (PathToOctaveBinaries[PathToOctaveBinaries.Length - 1] != '\\')
PathToOctaveBinaries = PathToOctaveBinaries + "\\";
pi.FileName = PathToOctaveBinaries + "octave.exe";
pi.RedirectStandardInput = true;
pi.RedirectStandardOutput = true;
pi.RedirectStandardError = true;
pi.UseShellExecute = false;
pi.CreateNoWindow = !CreateWindow;
pi.Verb = "open";
//
pi.WorkingDirectory = ".";
OctaveProcess.StartInfo = pi;
OctaveProcess.Start();
OctaveProcess.OutputDataReceived += new DataReceivedEventHandler(OctaveProcess_OutputDataReceived);
OctaveProcess.BeginOutputReadLine();
OctaveEntryText = ExecuteCommand(null);
//OctaveProcess.OutputDataReceived += new DataReceivedEventHandler(Oc
}
public double GetScalar(string scalar) {
string rasp = ExecuteCommand(scalar, 30000);
string val = rasp.Substring(rasp.LastIndexOf("\\") + 1).Trim();
return double.Parse(val);
}
public double[] GetVector(string vector) {
string rasp = ExecuteCommand(vector, 30000);
string[] lines = rasp.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
int i = 0;
//catam urmatorul entry
List<double> data = new List<double>();
while (i != lines.Length) {
string line = lines[i];
if (line.Contains("through") || line.Contains("and")) {
i++;
line = lines[i];
string[] dataS = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
for (int k = 0; k < dataS.Length; k++) {
data.Add(double.Parse(dataS[k]));
}
}
i++;
}
//caz special in care a pus toate rezultatele pe o singura linie
if (data.Count == 0) {
string[] dataS = lines[lines.Length - 1].Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
if (dataS.Length != 0)
for (int k = 0; k < dataS.Length; k++) {
data.Add(double.Parse(dataS[k]));
}
}
return data.ToArray();
}
public double[][] GetMatrix(string matrix) {
//string rasp = ExecuteCommand(matrix);
//aflam numarul de randuri
string rasp = ExecuteCommand(matrix + "(:,1)", 30000);
string[] lines = rasp.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
double[][] mat = new double[lines.Length - 1][];
for (int i = 0; i < mat.Length; i++) {
mat[i] = GetVector(matrix + "(" + (i + 1) + ",:)");
}
return mat;
}
StringBuilder SharedBuilder = new StringBuilder();
ManualResetEvent OctaveDoneEvent = new ManualResetEvent(false);
public string OctaveEntryText { get; internal set; }
public void WorkThread(object o) {
string command = (string)o;
SharedBuilder.Clear();
OctaveDoneEvent.Reset();
if (command != null) {
OctaveProcess.StandardInput.WriteLine(command);
}
//ca sa avem referinta pentru output
OctaveProcess.StandardInput.WriteLine("\"" + OctaveEchoString + "\"");
OctaveDoneEvent.WaitOne();
}
public string ExecuteCommand(string command, int timeout) {
if (OctaveProcess.HasExited) {
StartOctave(ptob, cw);
if (OctaveRestarted != null) OctaveRestarted(this, EventArgs.Empty);
}
exitError = false;
Thread tmp = new Thread(new ParameterizedThreadStart(WorkThread));
tmp.Start(command);
if (!tmp.Join(timeout)) {
tmp.Abort();
throw new Exception("Octave timeout");
}
if (exitError) {
throw new Exception(errorMessage);
}
return SharedBuilder.ToString();
}
public string ExecuteCommand(string command) {
// Thread tmp = new Thread(new ParameterizedThreadStart(WorkThread));
// tmp.Start(command);
// tmp.Join();
// return SharedBuilder.ToString();
if (OctaveProcess.HasExited)
{
OctaveProcess.Start();
}
SharedBuilder.Clear();
if (command != null)
{
OctaveProcess.StandardInput.WriteLine(command);
OctaveDoneEvent.Reset();
OctaveDoneEvent.WaitOne();
return SharedBuilder.ToString();
}
Octave octave = new Octave(@"c:\software\Octave-3.6.4",false);
octave.ExecuteCommand("a=[1,2;3,4];");
octave.ExecuteCommand("result=a;");
double[][] m = octave.GetMatrix("result");
}
bool exitError = false;
string errorMessage = null;
void OctaveProcess_OutputDataReceived(object sender, DataReceivedEventArgs e) {
if (e.Data == null) {
SharedBuilder.Clear();
//errorMessage = OctaveProcess.StandardError.ReadToEnd();
SharedBuilder.Append("Octave has exited with the following error message: \r\n" + errorMessage);
//exitError = true;
OctaveDoneEvent.Set();
return;
}
if (e.Data.Trim() == "ans = " + OctaveEchoString)
OctaveDoneEvent.Set();
else
SharedBuilder.Append(e.Data + "\r\n");
}
public event OctaveRestartedEventHandler OctaveRestarted;
public delegate void OctaveRestartedEventHandler(object sender, EventArgs e);
}
//custom class
// void OctaveProcess_OutputDataReceived (object sender, DataReceivedeEventArgs e)
/*{
if (e.data == null)
{
SharedBuilder.Clear();
SharedBuilder.Append("Octave has exited with the following error message: \r\n" + OctaveProcess.StandardError.ReadToEnd());
OctaveDoneEvent.Set();
return;
}
if (e.data.Trim == "ans =" + OctaveEchoString())
OctaveDoneEvent.set();
else
SharedBuilder.Append(e.Data + "\r\n");
}*/
}
它返回错误：“并非所有代码路径都返回一个值” 我该如何解决这个错误？
答案 0 :(得分：2)
您的ExecuteCommand函数应该返回一个字符串，但不是。这是ExecuteCommand重载，它接受一个参数。
答案 1 :(得分：0)
此函数的返回类型为string，但if (command != null)语句为false时不返回任何内容 -
public string ExecuteCommand(string command) {
// Thread tmp = new Thread(new ParameterizedThreadStart(WorkThread));
// tmp.Start(command);
// tmp.Join();
// return SharedBuilder.ToString();
if (OctaveProcess.HasExited)
{
OctaveProcess.Start();
}
SharedBuilder.Clear();
if (command != null)
{
OctaveProcess.StandardInput.WriteLine(command);
OctaveDoneEvent.Reset();
OctaveDoneEvent.WaitOne();
return SharedBuilder.ToString();
}
Octave octave = new Octave(@"c:\software\Octave-3.6.4",false);
octave.ExecuteCommand("a=[1,2;3,4];");
octave.ExecuteCommand("result=a;");
double[][] m = octave.GetMatrix("result");
//**** The Error is here *****
//return a string here
}
在提及部分返回一个字符串。我在评论中突出显示为 - //**** The Error is here *****
答案 2 :(得分：0)
你的
public string ExecuteCommand(string command) {
也没有return语句。
返回一些字符串或使其返回类型为void，如下所示：
public void ExecuteCommand(string command) {