C＃如何在命令行参数中实现破折号“-”选项？

您可以使用此：

课程计划：

static class Program
{
    [System.Runtime.InteropServices.DllImport("kernel32.dll")] // ### Edit 3 ###
    static extern bool AttachConsole(int dwProcessId); // ### Edit 3 ###

    /// <summary>The main entry point for the application.</summary>
    [STAThread]
    static void Main(string[] args)
    {
        // redirect console output to parent process;
        // must be before any calls to Console.WriteLine()
        AttachConsole(-1);// ### Edit 3 ###

        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);

        //program.exe -f c:\\desktop\\1.csv -o c:\\desktop\\1.png
        var inputFile = new List<string>();
        string outputFile = null;

        if (args.Length > 0)
        {
            for (int i = 0; i < args.Length; i++)
            {
                string a = args[i].ToLower();
                switch (a)
                {
                    case "-f":
                        for (i = i + 1; i < args.Length ; i++)
                        {
                            string f = args[i]; if (f.StartsWith("-")) { i--; break; }
                            inputFile.Add(f); //get next arg as inputFile
                        }
                        break;

                    case "-o":
                        outputFile = args[++i]; //get next arg as outputFile
                        break;
                }
            }

            if (inputFile.Count > 0 && outputFile != null)
            {
                var form = new Form2(); //specify your form class
                form.showErrorsInConsole = true; // ### Edit 3 ###
                //form.Visible = true;
                form.DoReadFiles(inputFile.ToArray());
                form.DoPlot();
                form.SavePic(outputFile);
                form.Dispose();
                return;
            }
        }
        //else
        Application.Run(new Form2()); //show GUI

        //MessageBox.Show("Args:\r\n" + s);

    }
}

表单类（包含图表的表单，在我的代码中为Form2）：

public partial class Form2 : Form
{
    public Form2()
    {
        InitializeComponent();
    }

    private void Form2_Load(object sender, EventArgs e)
    {

    }

    List<Read> rList = new List<Read>();
    public bool showErrorsInConsole = false; //### Edit 3 ###

    public void DoReadFiles(string[] fileNames)
    {
        try
        {
            rList.Clear();
            foreach (String file in fileNames) //if ((myStream = ff.OpenFile()) != null)
            {
                Read r = new Read(file);
                rList.Add(r);
            }

        }
        catch (Exception err)
        {
            //Inform the user if we can't read the file
            if (showErrorsInConsole) //### Edit 3 ###
                Console.WriteLine("\r\n *** Error: " + err.Message); //### Edit 3 ###
            else 
                MessageBox.Show(err.Message);
        }
    }

    public void DoPlot(int indX = 0, int indY = 1)
    {
        Plot.Draw(chart, rList, indX, indY);

    }

    public void SavePic(string outputFile)
    {
        bool isPng = outputFile.EndsWith(".png", StringComparison.OrdinalIgnoreCase);
        chart.SaveImage(outputFile, isPng ? ChartImageFormat.Png : ChartImageFormat.Jpeg);
    }

    void openToolStripMenuItem_Click(object sender, EventArgs e)
    {
        OpenFileDialog ff = new OpenFileDialog();

        ff.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); //"C:\\";
        ff.Filter = "csv files (*.csv)|*.csv|All files (*.*)|*.*";
        ff.Multiselect = true;
        ff.FilterIndex = 1;
        ff.RestoreDirectory = true;

        if (ff.ShowDialog() == DialogResult.OK)
        {
            try
            {
                DoReadFiles(ff.FileNames);

                //Populate the ComboBoxes
                if (rList.Count > 0)
                {
                    string[] header = rList[0].header; //header of first file
                    xBox.DataSource = header;
                    yBox.DataSource = header.Clone(); //without Clone the 2 comboboxes link together!
                }
                if (yBox.Items.Count > 1) yBox.SelectedIndex = 1; //select second item
            }
            catch (Exception err)
            {
                //Inform the user if we can't read the file
                MessageBox.Show(err.Message);
            }
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        DoPlot(xBox.SelectedIndex, yBox.SelectedIndex);

    }

} //end class Form2

课堂阅读：

public class Read
{
    public int nLines { get; private set; }
    public int nColumns { get; private set; }
    public string[] header { get; private set; }
    public float[,] data { get; private set; }
    public string fileName { get; set; }
    public string[] section { get; private set; }

    public Read(string file)
    {
        string[] pieces;

        fileName = Path.GetFileName(file);  
        string[] lines = File.ReadAllLines(file); // read all lines
        if (lines == null || lines.Length < 2) return; //no data in file
        header = lines[0].Split(','); //first line is header
        nLines = lines.Length - 1; //first line is header
        nColumns = header.Length;

        //read the numerical data and section name from the file
        data = new float[nLines, nColumns - 1]; // 1 less than nColumns as last col is sectionName
        section = new string[nLines];
        for (int i = 0; i < nLines; i++) 
        {
            pieces = lines[i + 1].Split(','); // i(+1) is because first line is header
            if (pieces.Length != nColumns) { MessageBox.Show("Invalid data at line " + (i + 2) + " of file " + fileName); return; }
            for (int j = 0; j < nColumns - 1; j++)
            {
                float.TryParse(pieces[j], out data[i, j]); //data[i, j] = float.Parse(pieces[j]);
            }
            section[i] = pieces[nColumns - 1]; //last item
        }
    }

}

类图：

public class Plot
{
    public static void Draw(Chart chart, List<Read> rList, int indX = 0, int indY = 1)
    {

        chart.Series.Clear(); //ensure that the chart is empty
        chart.Legends.Clear();
        Legend myLegend = chart.Legends.Add("myLegend");
        myLegend.Title = "myTitle";

        Color[] colors = new Color[] { Color.Black, Color.Blue, Color.Red, Color.Green, Color.Magenta, Color.DarkCyan, Color.Chocolate, Color.DarkMagenta }; 
        var sectionColors = new Dictionary<string, int>();

        bool separateSections = (rList.Count == 1); // #Edit: 4

        int i = 0;
        int iColor = -1, maxColor = -1;
        foreach (Read rr in rList)
        {
            float[,] data = rr.data;
            int nLines = rr.nLines;
            int nColumns = rr.nColumns;
            string[] header = rr.header;

            chart.Series.Add("Series" + i);
            chart.Series[i].ChartType = SeriesChartType.Line;

            chart.Series[i].LegendText = rr.fileName; // #Edit: 4
            if (separateSections) chart.Series[i].IsVisibleInLegend = false; // #Edit: 4

            chart.ChartAreas[0].AxisX.LabelStyle.Format = "{F2}";
            chart.ChartAreas[0].AxisX.Title = header[indX];
            chart.ChartAreas[0].AxisY.Title = header[indY];

            for (int j = 0; j < nLines; j++)
            {
                int k = chart.Series[i].Points.AddXY(data[j, indX], data[j, indY]);
                if (separateSections) // #Edit: 4
                {
                    string curSection = rr.section[j];
                    if (sectionColors.ContainsKey(curSection))
                    {
                        iColor = sectionColors[curSection];
                    }
                    else
                    {
                        maxColor++;
                        iColor = maxColor; sectionColors[curSection] = iColor;
                    }
                    chart.Series[i].Points[k].Color = colors[iColor];
                }
            }

            i++; //series#

        } //end foreach rr

        //fill legend based on series
        foreach (var x in sectionColors)
        {
            string section = x.Key;
            iColor = x.Value;
            myLegend.CustomItems.Add(colors[iColor], section); //new LegendItem()
        }
    }

}