django-post提交与显示（小案例）
一个简单的小案例post提交与输出
分为加载页面与显示页面
views.py
def cal(request):
return render(request,'example.html')
def result(request):
info={}
info['value1']=int(request.POST['first_value'])
info['value2']=int(request.POST['second_value'])
if request.POST['Calculation']=='add':
info['result']=info['value1']+info['value2']
elif request.POST['Calculation']=='sub':
info['result']=info['value1']-info['value2']
elif request.POST['Calculation']=='mul':
info['result']=info['value1']*info['value2']
else:
info['result']=info['value1']/info['value2']
a={'add':'加',
'sub':'减',
'mul':'乘',
'div':'除'
}
info['cal']=a[request.POST['Calculation']]
return render(request,'result.html',info)
example.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>小实例</title>
</head>
<body>
<form action="result/" method="POST">
{% csrf_token %}
<input type="text" name="first_value" > </br>
<select name="Calculation" >
<option value="add">加</option>
<option value="sub">减</option>
<option value="mul">乘</option>
<option value="div">除</option>
</select></br>
<input type="text" name='second_value'> </br>
<input type="submit" vaule='开始计算'>
</form>
</body>
</html>
result.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>显示结果</title>
</head>
<body>
<a href="{% url 'cal' %}">返回计算</a> </br>
<span>{{value1}}</span>
<span style="color: chartreuse;" >{{cal}}</span>
<span>{{value2}}</span>
<span style="color: rgb(245, 19, 19);">=</span>
<span>{{result}}</span>
</body>
</html>
url.py
from django.contrib import admin
from django.urls import path
from . import views
urlpatterns = [
path('cal/',views.cal,name='cal'),
path('cal/result/',views.result,name='result')
]
