编辑

Question

我有一个UWP应用。我已经从SharePoint驱动器中取出了一个excel文件，将其更改为字节数组，然后将其保存到硬盘中。

编辑

因此，我意识到此时我已经打开了文件，因此无需再次打开它。所以我做了一些修改（这次是整个课程）：

import numpy as np
import pandas as pd
from sklearn.decomposition import PCA

d  = {'Name': ['Bob', 'John', 'Alice'], 'Age': [25, 41, 30], 'Result' : [1.2, 0.5, 0.3], 'Ok' : [True, False, True]}
df = pd.DataFrame(data=d)

df.info()
print(df)

data = df.values

print(data)

pca = PCA(n_components=all)
pca.fit(data)

写入文件，但不使用UpdateCell（）要求的数据输入来更新文件。

Answer 1

好的...。这就是我最后得到的。它可能不漂亮，但是有效。

首先，我更改了click事件，以将更新与模板文件的传输分开。

    private async void FileButton_Click(object sender, RoutedEventArgs e)
    {
        await FileHelper.GetFileAsync();
        await FileHelper.UpdateCell(FileHelper.saveLocation, App.Date, 2, "D");
        await FileHelper.UpdateCell(FileHelper.saveLocation, App.Maximo, 3, "D");
        ...
        await FileHelper.UpdateCell(FileHelper.saveLocation, App.StopHours, 26, "J");
    }

然后，我将GetFileAsync（）和UpdateCell（）都更新为一个Task而不是一个void。然后，当我得到await Task.Run时，我添加了一个返回TaskStatus.RanToCompletion。

class FileHelper
{
    public static string saveLocation;
    public static SpreadsheetDocument spreadsheetDoc;

    public static async Task GetFileAsync()
    {
        var (authResult, message) = await Authentication.AquireTokenAsync();
        var httpClient = new HttpClient();
        HttpResponseMessage response;
        var request = new HttpRequestMessage(HttpMethod.Get, MainPage.fileurl);
        request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", authResult.AccessToken);
        response = await httpClient.SendAsync(request);
        byte[] fileBytes = await response.Content.ReadAsByteArrayAsync();
        StorageLibrary videoLibrary = await StorageLibrary.GetLibraryAsync(KnownLibraryId.Videos);
        string saveFolder = videoLibrary.SaveFolder.Path;
        string saveFileName = App.Date + "-" + App.StartTime + "-" + App.IBX + "-" + App.Generator + ".xlsx";
        saveLocation = saveFolder + "\\" + saveFileName;

        using (MemoryStream stream = new MemoryStream())
        {
            stream.Write(fileBytes, 0, (int)fileBytes.Length);
            using (spreadsheetDoc = SpreadsheetDocument.Open(stream, true))
            {
                await Task.Run(() =>
                {
                    File.WriteAllBytes(saveLocation, stream.ToArray());
                    return TaskStatus.RanToCompletion;
                });                    
            }
        }           
    }

    public async static Task UpdateCell(string docName, string text,
        uint rowIndex, string columnName)
    {
        StorageLibrary videoLibrary = await StorageLibrary.GetLibraryAsync(KnownLibraryId.Videos);
        string saveFolder = videoLibrary.SaveFolder.Path;
        string saveFileName = App.Date + "-" + App.StartTime + "-" + App.IBX + "-" + App.Generator + ".xlsx";
        saveLocation = saveFolder + "\\" + saveFileName;

        await Task.Run(() =>
        {
            using (spreadsheetDoc = SpreadsheetDocument.Open(saveLocation, true))
            {
                WorksheetPart worksheetPart =
                    GetWorksheetPartByName(spreadsheetDoc, "GenRun");

                if (worksheetPart != null)
                {
                    Cell cell = GetCell(worksheetPart.Worksheet,
                                                columnName, rowIndex);
                    cell.CellValue = new CellValue(text);
                    cell.DataType =
                        new EnumValue<CellValues>(CellValues.String);

                    worksheetPart.Worksheet.Save();
                }
            }
            return TaskStatus.RanToCompletion;
        });                              
    }

    private static WorksheetPart
         GetWorksheetPartByName(SpreadsheetDocument document,
         string sheetName)
    {
        IEnumerable<Sheet> sheets =
           document.WorkbookPart.Workbook.GetFirstChild<Sheets>().
           Elements<Sheet>().Where(s => s.Name == sheetName);

        if (sheets.Count() == 0)
        {
            return null;
        }

        string relationshipId = sheets.First().Id.Value;
        WorksheetPart worksheetPart = (WorksheetPart)
             document.WorkbookPart.GetPartById(relationshipId);
        return worksheetPart;
    }

    private static Cell GetCell(Worksheet worksheet,
              string columnName, uint rowIndex)
    {
        Row row = GetRow(worksheet, rowIndex);

        if (row == null)
            return null;

        return row.Elements<Cell>().Where(c => string.Compare
               (c.CellReference.Value, columnName +
               rowIndex, true) == 0).First();
    }

    private static Row GetRow(Worksheet worksheet, uint rowIndex)
    {
        return worksheet.GetFirstChild<SheetData>().
          Elements<Row>().Where(r => r.RowIndex == rowIndex).First();
    }
}

UWP OpenXML不将更改写入SpreadsheetDocument

编辑

1 个答案: