c# datatable/datagrid to List<T>

Question

我正在将数据从 excel 中提取到 datatable，然后再到 datagrid。数据的格式类似于；

"Time","Dist","speed","susp","rpm"
"0.000","0","235","29","13550"
"0.005","1","240","28.5","13560"
"0.010","2","245","28","13570"
"0.015","3","250","27.5","13580"
"0.020","4","255","27","13590"
"0.025","5","260","26.5","13600"
"0.030","6","265","26","13610"

但是，我拥有的列数和它们的名称事先是未知的，并且会因数据集而异。

在按钮单击事件 (WPF) 上拉入数据；

    private void databtn_Click(object sender, RoutedEventArgs e)
    {
        {
            OpenFileDialog openfile = new OpenFileDialog();
            openfile.DefaultExt = ".xlsx";
            openfile.Filter = "(.xlsx)|*.xlsx";

            var browsefile = openfile.ShowDialog();

            if (browsefile == true)
            {
                datafilepath.Text = openfile.FileName;

                ExcelEngine excelEngine = new ExcelEngine();

                IApplication application = excelEngine.Excel;

                application.DefaultVersion = ExcelVersion.Excel2013;

                IWorkbook workbook = application.Workbooks.Open(datafilepath.Text);

                IWorksheet worksheet = workbook.Worksheets[0];

                DataTable dt = worksheet.ExportDataTable(worksheet.UsedRange, ExcelExportDataTableOptions.ColumnNames);

                DG.ItemsSource = dt.DefaultView;
            }
        }
    }

如何将这些列中的每一个放入单独的值列表中，其中列表的名称由列标题给出？

然后我将使用它们来绘制 x,y 图表； (time,rpm) 或 (distance,rpm) - 我可以这样做，但我似乎无法遍历 datatable 或 datagrid 中指定列中的值。

我是 c# 和一般编程的新手，很抱歉，如果这是初级的，并提前感谢您提供的任何帮助。

Answer 1

您可以将列表存储在Dictionary<string, List<object>>：

Dictionary<string, List<object>> dict = dt.Columns.Cast<DataColumn>()
    .ToDictionary(c => c.ColumnName, c => dt.AsEnumerable().Select(r => r[c]).ToList());

这是一个 LINQ 查询，所以您必须添加 using System.Linq。

输出：

foreach (var kv in dict)
   Console.WriteLine($"Column: {kv.Key}, All values: {String.Join(",", kv.Value)}");