我有一个简单的表单,其中包含一个组合框和一个“保存”按钮。组合框的下拉列表显示:“选择颜色”,“红色”,“绿色”,“蓝色”。 “保存”按钮将用户从组合框中的选择保存到基础数据库表tbl_palette
中。
我还有一个查找表tlkp_colors
,其中包含颜色及其各自ID的列表。我使用此查找表填充组合框。
此简化示例的完整代码如下所示(可以按原样运行):
import sys
import os.path
import sqlite3
######### Qt DESIGNER AUTO GENERATED CODE ##########
from PyQt5 import QtCore,QtGui,QtWidgets
class Ui_MainWindow(object):
def setupUi(self,MainWindow):
MainWindow.setobjectname("MainWindow")
MainWindow.resize(407,240)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setobjectname("centralwidget")
self.comboBox = QtWidgets.QComboBox(self.centralwidget)
self.comboBox.setGeometry(QtCore.QRect(100,60,201,22))
self.comboBox.setobjectname("comboBox")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(150,130,101,28))
self.pushButton.setobjectname("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0,407,26))
self.menubar.setobjectname("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setobjectname("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self,MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow","MainWindow"))
self.pushButton.setText(_translate("MainWindow","Save"))
######### END OF AUTO GENERATED CODE ###############
DIR_PATH = os.path.dirname(os.path.abspath(__file__))
DB_NAME = 'test.db'
target_db = os.path.join(DIR_PATH,DB_NAME)
class Database:
def __init__(self):
# create database 'test.db',add schema,then close it
cnn = sqlite3.connect(target_db)
c = cnn.cursor()
c.executescript("""
DROP TABLE IF EXISTS tlkp_colors;
CREATE TABLE tlkp_colors
(
color_id INTEGER PRIMARY KEY,color_name TEXT
);
DROP TABLE IF EXISTS tbl_palette;
CREATE TABLE tbl_palette
(
id INTEGER PRIMARY KEY AUTOINCREMENT,color NUMber
);
INSERT INTO tlkp_colors VALUES (0,'Choose color');
INSERT INTO tlkp_colors VALUES (10,'Red');
INSERT INTO tlkp_colors VALUES (20,'Green');
INSERT INTO tlkp_colors VALUES (30,'Blue');
""")
cnn.commit()
cnn.close()
def save(self,your_choice):
data_tuple = (your_choice,)
sqlite_insert_query = """INSERT INTO tbl_palette (color) VALUES (?)"""
db = sqlite3.connect(target_db)
c = db.cursor()
c.execute(sqlite_insert_query,data_tuple )
db.commit()
db.close()
def close_db(self):
target_db.close()
def populate_cbo_from_tlkp_table():
cnn = sqlite3.connect(target_db)
c = cnn.cursor()
c.execute("SELECT color_name FROM tlkp_colors")
list_of_strings = [item[0] for item in c.fetchall()]
cnn.commit()
cnn.close()
return list_of_strings
# comment the following line after the first run (db created already)
db = Database() # create a new instance Database
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
ui.comboBox.addItems(populate_cbo_from_tlkp_table())
ui.pushButton.clicked.connect(lambda : db.save(ui.comboBox.currentIndex()))
MainWindow.show()
sys.exit(app.exec_())
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
当我单击“保存”按钮时,我希望将颜色ID保存在基础表tbl_palette
中,而不是颜色本身-即,我希望10
NOT {{1 }}。
如果您能解释如何更改代码来做到这一点,我将非常感谢。我已经在网上搜索过,但是到目前为止,没有任何东西可以帮助我解决问题。我是Qt Designer的新手,似乎丢失了一些东西。