python将图片存到Sql server数据库，使用PyQt5展示数据库图片

掌握如何通过Pyqt5将图片存到数据库，并且获取数据库图片。展示在UI界面上。

效果展示
1、点击“上传图片至数据库”，此方法是通过将电脑本地的图片转为二进制格式，然后保存到数据库中。
读取图片为二进制方法：

with open(imgName,'rb') as f :
    img_data = f.read()

2、返回是否上传成功的结果。这里返回的是图片的名称和宽、高

3、这里展示的就是上传数据库之后的图片。
下拉框对刚刚的图片名称：【第一张图片.jpg】进行展示

下拉框选择：【第二张图片.jpg】然后点击读取，进行展示

这个是UI代码

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'imageshow.ui'
#
# Created by: PyQt5 UI code generator 5.15.9
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(887, 699)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.label_ShowImg = QtWidgets.QLabel(self.centralwidget)
        self.label_ShowImg.setStyleSheet("background-color: rgb(161, 161, 161);")
        self.label_ShowImg.setObjectName("label_ShowImg")
        self.verticalLayout.addWidget(self.label_ShowImg)
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.frame)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.lineEdit = QtWidgets.QLineEdit(self.frame)
        self.lineEdit.setObjectName("lineEdit")
        self.horizontalLayout.addWidget(self.lineEdit)
        self.pushButton = QtWidgets.QPushButton(self.frame)
        self.pushButton.setObjectName("pushButton")
        self.horizontalLayout.addWidget(self.pushButton)
        self.comboBox = QtWidgets.QComboBox(self.frame)
        self.comboBox.setObjectName("comboBox")
        self.horizontalLayout.addWidget(self.comboBox)
        self.pushButton_2 = QtWidgets.QPushButton(self.frame)
        self.pushButton_2.setObjectName("pushButton_2")
        self.horizontalLayout.addWidget(self.pushButton_2)
        self.horizontalLayout.setStretch(0, 1)
        self.horizontalLayout.setStretch(1, 1)
        self.horizontalLayout.setStretch(2, 1)
        self.horizontalLayout.setStretch(3, 1)
        self.verticalLayout.addWidget(self.frame)
        self.verticalLayout.setStretch(0, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 887, 22))
        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.label_ShowImg.setText(_translate("MainWindow", "图片显示"))
        self.lineEdit.setPlaceholderText(_translate("MainWindow", "图片路径"))
        self.pushButton.setText(_translate("MainWindow", "上传图片至数据库"))
        self.pushButton_2.setText(_translate("MainWindow", "读取数据库图片"))