Question

我创建了一个Excel工作簿。我可以将此excel工作簿直接转换为内存流或字节数组以通过HTTP传递吗？我不想保存Excel工作簿。我需要通过angular js下载此excel文件。我正在使用Web API 2

    using Excel = Microsoft.Office.Interop.Excel;
    private MemoryStream ExportDataSetToExcel()
    {
        System.Data.DataTable employeeTable = new System.Data.DataTable("Employee");
        employeeTable.Columns.Add("Employee ID");
        employeeTable.Columns.Add("Employee Name");
        employeeTable.Rows.Add("1", "ABC");
        employeeTable.Rows.Add("2", "DEF");
        employeeTable.Rows.Add("3", "PQR");
        employeeTable.Rows.Add("4", "XYZ");

        ////Create a Department Table
        System.Data.DataTable departmentTable = new System.Data.DataTable("Department");
        departmentTable.Columns.Add("Department ID");
        departmentTable.Columns.Add("Department Name");
        departmentTable.Rows.Add("1", "IT");
        departmentTable.Rows.Add("2", "HR");
        departmentTable.Rows.Add("3", "Finance");

        ////Create a DataSet with the existing DataTables
        DataSet ds = new DataSet("Organization");
        ds.Tables.Add(employeeTable);
        ds.Tables.Add(departmentTable);

        ////Creae an Excel application instance
        Excel.Application excelApp = new Excel.Application();
        excelApp.Visible = true;
        Excel.Workbook excelWorkBook = excelApp.Workbooks.Add();

        foreach (System.Data.DataTable table in ds.Tables)
        {
            ////Add a new worksheet to workbook with the Datatable name
            Microsoft.Office.Interop.Excel.Worksheet excelWorkSheet = excelWorkBook.Sheets.Add();
            excelWorkSheet.Name = table.TableName;

            for (int i = 1; i < table.Columns.Count + 1; i++)
            {
                excelWorkSheet.Cells[1, i] = table.Columns[i - 1].ColumnName;
                excelWorkSheet.Cells[1, i].Font.Bold = true;
            }

            for (int j = 0; j < table.Rows.Count; j++)
            {
                for (int k = 0; k < table.Columns.Count; k++)
                {
                    excelWorkSheet.Cells[j + 2, k + 1] = table.Rows[j].ItemArray[k].ToString();
                    excelWorkSheet.Cells[j + 2, k + 1].Interior.Color = Excel.XlRgbColor.rgbRed;
                }
            }
        }

        MemoryStream ms = new MemoryStream();

        ////excelWorkBook.SaveAs(ms, Type.Missing, Type.Missing, Type.Missing, true, false, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);
        excelWorkBook.Close();
        excelApp.Quit();
        return ms;
    }

Answer 1

您不能直接转换。您必须将文件保存到临时路径

from bokeh.io import show
from bokeh.models import TapTool, CustomJS, ColumnDataSource
from bokeh.plotting import figure

base_xs = [0, 1, 1, 0]
base_ys = [0, 0, 1, 1]


def offset(base, d):
    return [i + d for i in base]


ds = ColumnDataSource(dict(xs=[[[offset(base_xs, dx)]] for dx in base_xs],
                           ys=[[[offset(base_ys, dy)]] for dy in base_ys],
                           color=['red', 'green', 'blue', 'yellow']))

tt = TapTool(behavior='inspect')
p = figure(tools=[tt, 'reset'])
p.multi_polygons('xs', 'ys', color='color', source=ds)

tt.callback = CustomJS(args=dict(x_range=p.x_range, y_range=p.y_range),
                       code="""\
    const {source} = cb_data;
    const idx = source.inspected.indices[0];
    const {xs, ys} = source.data;
    const poly_xs = xs[idx].flat(2);
    const poly_ys = ys[idx].flat(2);
    x_range.start = Math.min(...poly_xs);
    x_range.end = Math.max(...poly_xs);
    y_range.start = Math.min(...poly_ys);
    y_range.end = Math.max(...poly_ys);
""")

show(p)

将Excel工作簿转换为内存流/字节数组以下载

1 个答案: