Question

为什么只有一个文本输入（没有任何按钮）的表单将被提交，而没有两个文本输入的表单将被提交？

示例：https://codesandbox.io/s/form-submitting-ztqpz?fontsize=14

Answer 1

在每个表单上添加一个提交按钮（也很少输入），它既可以使用按钮，也可以按Enter键

from tkinter import *
from pandastable import Table, TableModel

class MainClass(Frame):
    def __init__(self, parent=None):
        self.parent = parent
        Frame.__init__(self)
        self.main = self.master
        self.main.geometry('600x400+200+100')
        self.main.title('Overview trading pairs')
        f = Frame(self.main)
        f.pack(fill=BOTH,expand=1)
        df = TableModel.getSampleData()
        n = list(df.columns)
        pt = Table(f, dataframe=df, showtoolbar=0, showstatusbar=0)
        pt.columncolors[n[4]] = '#dcf1fc'
        pt.rowcolors[4] = '#dcf1fc'
        pt.setRowColors(rows=1, clr='#dcf1fc')

        pt.show()
        return

app = MainClass()
#launch the app
app.mainloop()

Answer 2

您可以通过多种方式做到这一点，

最好的方法是使用tabindex来防止标签到达此按钮-

import pandas as pd
import numpy as np


ef={'Date':['20.3.2019','21.3.2019','22.3.2019','24.3.2019','25.5.2019','29.6.2019','30.6.2019'],
    'Quantity Bought':[342.0,2330.0,'nan','nan',344,'nan','nan'],
    'Buy Price':[21.0,45.0,'nan','nan',22,'nan','nan'],
    'Sell Quantity':['nan','nan',110,221,'nan',455,566],
    'Sell Price':['nan','nan',56,21,'nan',29,30]}
ef=pd.DataFrame(ef)

ef.replace('nan', np.nan, inplace=True)

numberOfRows = len(ef.index)

el={'Date':[],
    'Quantity':[],
    'Price':[]}
el = pd.DataFrame(el)

row = 0
i = 0

while i < numberOfRows:
    if ef.isnull().iat[row,1] != True:
        adding = pd.DataFrame({"Date":[ef.iat[row,0]],
                               "Quantity":[ef.iat[row,1]],
                               "Price":[ef.iat[row,2]]})
        el = el.append(adding, ignore_index=True)
        i += 1
        row += 1
    else:
        adding = pd.DataFrame({"Date": [ef.iat[row, 0]],
                               "Quantity": [ef.iat[row, 3]*(-1)],
                               "Price": [ef.iat[row, 4]]})
        el = el.append(adding, ignore_index=True)
        i += 1
        row += 1
print(el)

您也可以隐藏按钮链接。或者您可以使用这样的Java脚本功能-

<input type="submit" style="position: absolute; left: -9999px; width: 1px; height: 1px;" tabindex="-1" />

为什么其中输入很少，没有任何按钮的表单不会提交？

2 个答案: