Question

我将excel中的数据提取到datatable，然后提取到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，我拥有的列数及其名称是事先未知的，并且会从数据集更改为数据集。

通过按钮点击事件（WPF）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;
            }
        }
    }

如何将每个列放入单独的值列表中，列表名称由列标题给出？

然后我将使用它们绘制x，y图表; （时间，转速）或（距离，转速） - 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＃和编程的新手，对不起，如果这是初级的，请提前感谢您提供任何帮助。

Answer 1

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

中

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，因此您必须添加using System.Linq。

输出：

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

c＃datatable / datagrid到List <t>

1 个答案: