1

在我的 Django 项目中，我需要将内存中的 Excel 文件发送到客户端进行下载。用户单击按钮后应开始下载。

这是我的项目结构：

C:.
│   db.sqlite3
│   manage.py
│   Pipfile
│   Pipfile.lock
│   requirements.txt
│   
├───app
│   │   admin.py
│   │   apps.py
│   │   forms.py
│   │   models.py
│   │   tests.py
│   │   urls.py
│   │   views.py
│   │   __init__.py
│   │   
│   ├───migrations
│   │       __init__.py
│   │       
│   └───templates
│       └───app
│               home.html
│               
└───project
        settings.py
        urls.py
        wsgi.py
        __init__.py

我的app/forms.py：

from django import forms

class HomeForm(forms.Form):
    OPTIONS = (
        ('name', 'name'),        
        ('city', 'city')        
    )

    columns = forms.MultipleChoiceField(widget=forms.CheckboxSelectMultiple,
                                        choices=OPTIONS)

我的app/views.py：

from django.views.generic import TemplateView
from django.shortcuts import render
from app.forms import HomeForm

class HomeView(TemplateView):
    template = 'app/home.html'


    def get(self, request):
        form = HomeForm()        
        return render(request, self.template, {'form': form})

这是我的app/urls.py：

from django.urls import path
from . import views

urlpatterns = [
    path('', views.HomeView.as_view(), name="home"),
]

我的project/urls.py：

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('', include('app.urls')),
    path('admin/', admin.site.urls),  
]

我的app/home.html：

<!DOCTYPE html>
<html>
<head>    
    <title>Generate Data</title>    
</head>
<body>
    <form method="get">
        {% csrf_token %}
        {{ form.as_p }}
        <input type="submit" value="Generate Excel">
    </form>

</html>
</body>

带有复选框的页面

我是 Django 的新手。如何获取列 (name, city) 作为 a list，创建字典{‘name’: [‘Bob’, ‘Tom’], ‘city’: [‘San Francisco’, ‘Atlanta’]}，并在以下函数中使用字典，该函数创建内存中的 Excel 数据：

import pandas as pd
from io import BytesIO as IO
from django.http import HttpResponse
import xlsxwriter

def write_to_excel():

    df_output = pd.DataFrame({'name': ['Bob', 'Tom'], 'city': ['San Francisco', 'Atlanta']})

    # my "Excel" file, which is an in-memory output file (buffer) 
    # for the new workbook
    excel_file = IO()

    xlwriter = pd.ExcelWriter(excel_file, engine='xlsxwriter')

    df_output.to_excel(xlwriter, 'sheetname')

    xlwriter.save()
    xlwriter.close()

    # important step, rewind the buffer or when it is read() you'll get nothing
    # but an error message when you try to open your zero length file in Excel
    excel_file.seek(0)

    # set the mime type so that the browser knows what to do with the file
    response = HttpResponse(excel_file.read(), content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')

    # set the file name in the Content-Disposition header
    response['Content-Disposition'] = 'attachment; filename=myfile.xlsx'

    return response

当用户单击该Generate Excel按钮时，应下载包含数据的 Excel 文件。我已经给出了所有这些代码，因为我认为有人帮助我是必要的。

4

0 回答 0