Python PyQT5 tableWidget中MSSQL数据加载缓慢
我正在创建一个GUI应用程序，使用PyQt5和MSSQL作为数据库服务器。我能够在2秒钟内轻松连接MSSQL服务器，但当我使用简单的select查询加载数据时，它需要10秒钟，通常最多需要2秒钟。我不知道我的代码哪里出错了 我的代码结构：Python PyQT5 tableWidget中MSSQL数据加载缓慢,python,mysql,pyqt5,Python,Mysql,Pyqt5,我正在创建一个GUI应用程序，使用PyQt5和MSSQL作为数据库服务器。我能够在2秒钟内轻松连接MSSQL服务器，但当我使用简单的select查询加载数据时，它需要10秒钟，通常最多需要2秒钟。我不知道我的代码哪里出错了 我的代码结构： main.py（由.ui生成） connection.py（数据库连接） mainApp.py（其中tablewidget、信号槽被继承） 数据处理程序（加载数据/sql查询） 连接.py from PyQt5.QtSql import QSqlDatabas
from PyQt5.QtSql import QSqlDatabase, QSqlQuery, QSqlQueryModel
from PyQt5.QtWidgets import QTableView, QApplication,QMessageBox, QLabel
import sys
USERNAME = '********'
PASSWORD = '******'
DATABASE = ''
def selectedServer(server):
switcher = {
'Server 1': '1**.1*.7*.1*,1433',
'Server 2': '1**.1*.7*.1*,1433',
}
return switcher.get(server, "Invalid Server ")
def createConnection(self, server):
SERVER = selectedServer(server)
global db
db = QSqlDatabase.addDatabase('QODBC')
db.setDatabaseName(f'Driver={{SQL SERVER}}; Server={SERVER}; UID={USERNAME}; PWD={PASSWORD};')
if db.open():
print(f'{server} Server connected successfully')
QMessageBox.about(self, 'Connection',f'{server} Server connected successfully')
return True
else:
print(f'{server} connection failed')
return False
#loading data---------------
def loadData(query_string):
query = QSqlQuery(db)
res = query.exec(query_string)
record = query.record()
column_number= record.count()
header_list=[]
for i in range(column_number):
header_list.append(record.field(i).name())
result_list = []
while query.next():
sublist =[]
for i in range(column_number):
sublist.append(query.value(i))
result_list.append(sublist)
return [header_list,result_list]
from connection.connection import *
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
def loadInsightAccount(input_value,type_value):
if type_value=="AccountID":
print("True")
query_string="SELECT convert(int,iinsightaccountid) as AccountID,* from AccountMaster.dbo.Accounttable(nolock) where iinsightAccountID="+input_value
print(query_string)
InsightAcc_data=loadData(query_string)
header_list = InsightAcc_data[0]
value_list = InsightAcc_data[1]
# print(header_list)
# print(value_list)
return (InsightAcc_data)
def insightAccountCall(self):
print("Loading insight Account datas...")
input_value=self.account_lineEdit.text()
type_value=str(self.account_comboBox.currentText())
accountData2=loadInsightAccount(input_value,type_value)
header_list = accountData2[0]
value_list = accountData2[1]
no_rows = len(value_list)
no_columns= len(header_list)
self.tableWidget_accInfo.setRowCount(no_rows)
self.tableWidget_accInfo.setColumnCount(no_columns)
self.tableWidget_accInfo.setHorizontalHeaderLabels(tuple(header_list))
self.tableWidget_accInfo.setSelectionMode(QAbstractItemView.SingleSelection)
self.tableWidget_accInfo.setSelectionBehavior(QAbstractItemView.SelectRows)
self.tableWidget_accInfo.setSelectionMode(QAbstractItemView.ExtendedSelection)
self.tableWidget_accInfo.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.tableWidget_accInfo.setSortingEnabled(True)
self.tableWidget_accInfo.resizeRowsToContents()
self.tableWidget_accInfo.horizontalHeader().sortIndicatorChanged.connect(self.tableWidget_accInfo.resizeRowsToContents)
self.tableWidget_accInfo.setSelectionBehavior(QAbstractItemView.SelectRows) #full row select
self.tableWidget_accInfo.setRowHeight(0, 10)
self.tableWidget_accInfo.resizeColumnsToContents()
for row in range(no_rows):
for col in range(no_columns):
self.tableWidget_accInfo.setItem(row,col,QTableWidgetItem(str(value_list[row][col])))
from PyQt5.QtSql import QSqlDatabase, QSqlQuery, QSqlQueryModel
from PyQt5.QtWidgets import QTableView, QApplication,QMessageBox, QLabel
import sys
USERNAME = '********'
PASSWORD = '******'
DATABASE = ''
def selectedServer(server):
switcher = {
'Server 1': '1**.1*.7*.1*,1433',
'Server 2': '1**.1*.7*.1*,1433',
}
return switcher.get(server, "Invalid Server ")
def createConnection(self, server):
SERVER = selectedServer(server)
global db
db = QSqlDatabase.addDatabase('QODBC')
db.setDatabaseName(f'Driver={{SQL SERVER}}; Server={SERVER}; UID={USERNAME}; PWD={PASSWORD};')
if db.open():
print(f'{server} Server connected successfully')
QMessageBox.about(self, 'Connection',f'{server} Server connected successfully')
return True
else:
print(f'{server} connection failed')
return False
#loading data---------------
def loadData(query_string):
query = QSqlQuery(db)
res = query.exec(query_string)
record = query.record()
column_number= record.count()
header_list=[]
for i in range(column_number):
header_list.append(record.field(i).name())
result_list = []
while query.next():
sublist =[]
for i in range(column_number):
sublist.append(query.value(i))
result_list.append(sublist)
return [header_list,result_list]
from connection.connection import *
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
def loadInsightAccount(input_value,type_value):
if type_value=="AccountID":
print("True")
query_string="SELECT convert(int,iinsightaccountid) as AccountID,* from AccountMaster.dbo.Accounttable(nolock) where iinsightAccountID="+input_value
print(query_string)
InsightAcc_data=loadData(query_string)
header_list = InsightAcc_data[0]
value_list = InsightAcc_data[1]
# print(header_list)
# print(value_list)
return (InsightAcc_data)
def insightAccountCall(self):
print("Loading insight Account datas...")
input_value=self.account_lineEdit.text()
type_value=str(self.account_comboBox.currentText())
accountData2=loadInsightAccount(input_value,type_value)
header_list = accountData2[0]
value_list = accountData2[1]
no_rows = len(value_list)
no_columns= len(header_list)
self.tableWidget_accInfo.setRowCount(no_rows)
self.tableWidget_accInfo.setColumnCount(no_columns)
self.tableWidget_accInfo.setHorizontalHeaderLabels(tuple(header_list))
self.tableWidget_accInfo.setSelectionMode(QAbstractItemView.SingleSelection)
self.tableWidget_accInfo.setSelectionBehavior(QAbstractItemView.SelectRows)
self.tableWidget_accInfo.setSelectionMode(QAbstractItemView.ExtendedSelection)
self.tableWidget_accInfo.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.tableWidget_accInfo.setSortingEnabled(True)
self.tableWidget_accInfo.resizeRowsToContents()
self.tableWidget_accInfo.horizontalHeader().sortIndicatorChanged.connect(self.tableWidget_accInfo.resizeRowsToContents)
self.tableWidget_accInfo.setSelectionBehavior(QAbstractItemView.SelectRows) #full row select
self.tableWidget_accInfo.setRowHeight(0, 10)
self.tableWidget_accInfo.resizeColumnsToContents()
for row in range(no_rows):
for col in range(no_columns):
self.tableWidget_accInfo.setItem(row,col,QTableWidgetItem(str(value_list[row][col])))
from PyQt5.QtSql import QSqlDatabase, QSqlQuery, QSqlQueryModel
from PyQt5.QtWidgets import QTableView, QApplication,QMessageBox, QLabel
import sys
USERNAME = '********'
PASSWORD = '******'
DATABASE = ''
def selectedServer(server):
switcher = {
'Server 1': '1**.1*.7*.1*,1433',
'Server 2': '1**.1*.7*.1*,1433',
}
return switcher.get(server, "Invalid Server ")
def createConnection(self, server):
SERVER = selectedServer(server)
global db
db = QSqlDatabase.addDatabase('QODBC')
db.setDatabaseName(f'Driver={{SQL SERVER}}; Server={SERVER}; UID={USERNAME}; PWD={PASSWORD};')
if db.open():
print(f'{server} Server connected successfully')
QMessageBox.about(self, 'Connection',f'{server} Server connected successfully')
return True
else:
print(f'{server} connection failed')
return False
#loading data---------------
def loadData(query_string):
query = QSqlQuery(db)
res = query.exec(query_string)
record = query.record()
column_number= record.count()
header_list=[]
for i in range(column_number):
header_list.append(record.field(i).name())
result_list = []
while query.next():
sublist =[]
for i in range(column_number):
sublist.append(query.value(i))
result_list.append(sublist)
return [header_list,result_list]
from connection.connection import *
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
def loadInsightAccount(input_value,type_value):
if type_value=="AccountID":
print("True")
query_string="SELECT convert(int,iinsightaccountid) as AccountID,* from AccountMaster.dbo.Accounttable(nolock) where iinsightAccountID="+input_value
print(query_string)
InsightAcc_data=loadData(query_string)
header_list = InsightAcc_data[0]
value_list = InsightAcc_data[1]
# print(header_list)
# print(value_list)
return (InsightAcc_data)
def insightAccountCall(self):
print("Loading insight Account datas...")
input_value=self.account_lineEdit.text()
type_value=str(self.account_comboBox.currentText())
accountData2=loadInsightAccount(input_value,type_value)
header_list = accountData2[0]
value_list = accountData2[1]
no_rows = len(value_list)
no_columns= len(header_list)
self.tableWidget_accInfo.setRowCount(no_rows)
self.tableWidget_accInfo.setColumnCount(no_columns)
self.tableWidget_accInfo.setHorizontalHeaderLabels(tuple(header_list))
self.tableWidget_accInfo.setSelectionMode(QAbstractItemView.SingleSelection)
self.tableWidget_accInfo.setSelectionBehavior(QAbstractItemView.SelectRows)
self.tableWidget_accInfo.setSelectionMode(QAbstractItemView.ExtendedSelection)
self.tableWidget_accInfo.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.tableWidget_accInfo.setSortingEnabled(True)
self.tableWidget_accInfo.resizeRowsToContents()
self.tableWidget_accInfo.horizontalHeader().sortIndicatorChanged.connect(self.tableWidget_accInfo.resizeRowsToContents)
self.tableWidget_accInfo.setSelectionBehavior(QAbstractItemView.SelectRows) #full row select
self.tableWidget_accInfo.setRowHeight(0, 10)
self.tableWidget_accInfo.resizeColumnsToContents()
for row in range(no_rows):
for col in range(no_columns):
self.tableWidget_accInfo.setItem(row,col,QTableWidgetItem(str(value_list[row][col])))
与
QTableView一起使用。无论您如何使用for循环等在python中加载所有内容，速度总是会慢得多。非常感谢@ekhumoro，我现在能够使用QTableView的QsqlQueryModel加载数据。如何在我已在mainWindow.py中设计的“tableWidget”中显示您不能将QSqlQueryModel
与QTableWidget
一起使用，因此必须将其替换为QTableView
。QTableWidget类继承了QTableWidget
类，因此基本相同，但没有一些方便的方法。谢谢@ekhumoro，请参见答案部分。我已经重新创建了.ui文件，并将QTableWidget更新为QTableView。现在我无法返回数据集。我知道，我做得不好。我是Pyqt5的新手。请帮帮我。如何返回数据集并在tableView中显示？在设置过程中在视图上设置一次模型，然后在模型上设置新查询以显示所选数据。不要继续重新创建模型和视图。只需执行self.tableView.model（）.setQuery（qry）