vc中如何打开文件选择对话框？
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参考技术A 这个可以:CString filter_str = "txt files (*.txt)|*.txt|word files (*.doc)|*.doc||";
CFileDialog mSaveDlg(FALSE,NULL,NULL,NULL,filter_str,NULL);//初始化
mSaveDlg.DoModal();//显示
DWORD filter_num = mSaveDlg.m_ofn.nFilterIndex;//返回的是当前选择的文件类型是第几个
filter_num -= 1;//适应数组
char a[][9] = ;//文件类型数组
CString file_ext = a[filter_num];//获得文件类型的名称
int ext_length = file_ext.GetLength();//获得长度
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如何修复在python中选择文件后不断重新打开的文件对话框
【中文标题】如何修复在python中选择文件后不断重新打开的文件对话框【英文标题】：How to fix a file-dialog that keeps reopenning after a file have been choosen in python 【发布时间】：2019-04-18 13:51:23 【问题描述】：我是 pyqt5 的新手，我需要帮助来关闭我的应用程序中的文件对话框。 UI 是使用 QT 设计器创建的。当我选择一个文件并按下打开按钮时，文件对话框首先关闭，然后再次重新打开。那是我的问题。它不应重新打开。
我尝试在对话框fileDialog.close() 和fileDialog.hide() 上使用以下这些功能，但未能使其正常工作。
我使用两个不同的文件，一个用于主窗口，另一个用于文件对话框。在主窗口中，我使用以下类
class Main (QtWidgets.QMainWindow):
def __init__(self):
super(Main, self).__init__()
uic.loadUi('MainWindow.ui', self)
self.btnChooseFile.clicked.connect(self.chooseFile)
def chooseFile(self):
fileDialog = OpenFileDialog.FileDialog()
fileDialog.openFileNameDialog()
app = QtWidgets.QApplication([])
win = Main()
win.show()
sys.exit(app.exec())
另一个类看起来叫做OpenFileDialog.py，看起来像这样：
class FileDialog(QWidget):
def __init__(self):
super(FileDialog, self).__init__()
self.title = 'Choose image-file'
self.left = 10
self.top = 10
self.width = 640
self.height = 480
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
self.openFileNameDialog()
self.openFileNamesDialog()
self.saveFileDialog()
self.show()
def openFileNameDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
fileName, _ = QFileDialog.getOpenFileName(self,"QFileDialog.getOpenFileName()", "","All Files (*);;Python Files (*.py)", options=options)
if fileName:
print(fileName)
def openFileNamesDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
files, _ = QFileDialog.getOpenFileNames(self,"QFileDialog.getOpenFileNames()", "","All Files (*);;Python Files (*.py)", options=options)
if files:
print(files)
def saveFileDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
fileName, _ = QFileDialog.getSaveFileName(self,"QFileDialog.getSaveFileName()","","All Files (*);;Text Files (*.txt)", options=options)
if fileName:
print(fileName)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = FileDialog()
sys.exit(app.exec_())
UI 文件如下所示：
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>winMain</class>
<widget class="QMainWindow" name="winMain">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>280</width>
<height>320</height>
</rect>
</property>
<property name="minimumSize">
<size>
<width>280</width>
<height>320</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>280</width>
<height>320</height>
</size>
</property>
<property name="windowTitle">
<string>OCR</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QPushButton" name="btnChooseFile">
<property name="geometry">
<rect>
<x>80</x>
<y>10</y>
<width>93</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string>Choose file</string>
</property>
</widget>
<widget class="QLabel" name="lblFile">
<property name="geometry">
<rect>
<x>40</x>
<y>40</y>
<width>31</width>
<height>16</height>
</rect>
</property>
<property name="text">
<string><html><head/><body><p><span style=" font-weight:600;">File:</span></p></body></html></string>
</property>
</widget>
<widget class="QLabel" name="lblFilePath">
<property name="geometry">
<rect>
<x>40</x>
<y>60</y>
<width>221</width>
<height>16</height>
</rect>
</property>
<property name="text">
<string><html><head/><body><p><span style=" font-style:italic;">FilePath</span></p></body></html></string>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>280</width>
<height>26</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
我该如何解决这个问题？
编辑 我通过删除选择文件函数中的以下代码行来解决问题：
fileDialog.openFileNameDialog()
【问题讨论】：
@user9402680 我不确定我理解你的意思。如果我在 initUI 函数中删除这三行中的两行，那么它不会重新打开一次以上？ @user9402680 还是谢谢你！我也尝试过，但也没有用。 @user9402680self.btnChooseFile.clicked.connect(self.chooseFile) 这是我用来将按钮连接到特定功能的方式。我应该换一种方式吗？
老实说，我没有解决你的问题的线索。我建议你也上传你的ui文件，因为只有这些代码是不可执行的。更多知识的人会回答。对不起，我帮不了你，我会删除我的评论。
【参考方案1】：
试试看：
maun.py
import sys
import os # +++
from PyQt5 import QtCore, QtGui, QtWidgets, uic
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class FileDialog(QWidget):
def __init__(self):
super(FileDialog, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('Choose image-file')
self.setGeometry(100, 100, 640, 480)
# self.openFileNameDialog()
# self.openFileNamesDialog()
# self.saveFileDialog()
def openFileNameDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
fileName, _ = QFileDialog.getOpenFileName(self,
"QFileDialog.getOpenFileName()",
"",
"All Files (*);;Python Files (*.py)",
options=options)
if fileName:
print("fileName->", fileName)
return fileName # +++
def openFileNamesDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
files, _ = QFileDialog.getOpenFileNames(self,
"QFileDialog.getOpenFileNames()",
"",
"All Files (*);;Python Files (*.py)",
options=options)
if files:
print("files -->>", files)
return files # +++
def saveFileDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
fileName, _ = QFileDialog.getSaveFileName(self,
"QFileDialog.getSaveFileName()",
"",
"All Files (*);;Text Files (*.txt)",
options=options)
if fileName:
print("save fileName->", fileName)
return fileName # +++
class Main(QtWidgets.QMainWindow):
def __init__(self):
super(Main, self).__init__()
uic.loadUi('MainWindow.ui', self)
self.btnChooseFile.clicked.connect(self.chooseFile)
self.btnChooseFile_2.clicked.connect(self.chooseFiles) # +++
self.btnChooseFile_3.clicked.connect(self.saveFile) # +++
def chooseFile(self):
# fileDialog = OpenFileDialog.FileDialog()
fileDialog = FileDialog()
fileName = fileDialog.openFileNameDialog()
self.lblFile.setText( "<b>File:</b> ".format( os.path.basename(fileName) ))
self.lblFilePath.setText( "<b>FilePath:</b> ".format( os.path.dirname(fileName) ))
def chooseFiles(self):
fileDialog = FileDialog()
files = fileDialog.openFileNamesDialog()
fileNames = ", ".join([ os.path.basename(fileName) for fileName in files ])
self.lblFile.setText( "<b>Files:</b> ".format( os.path.basename(fileNames) ))
self.lblFilePath.setText( "<b>FilePath:</b> ".format( os.path.dirname(files[0]) ))
def saveFile(self):
fileDialog = FileDialog()
fileName = fileDialog.saveFileDialog()
self.lblFile.setText( "<b>Save File:</b> ".format( os.path.basename(fileName) ))
self.lblFilePath.setText( "<b>FilePath:</b> ".format( os.path.dirname(fileName) ))
if __name__ == '__main__':
app = QtWidgets.QApplication([])
win = Main()
win.show()
sys.exit(app.exec())
MainWindow.ui
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>winMain</class>
<widget class="QMainWindow" name="winMain">
<property name="enabled">
<bool>true</bool>
</property>
<property name="minimumSize">
<size>
<width>380</width>
<height>380</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>380</width>
<height>320</height>
</size>
</property>
<property name="windowTitle">
<string>OCR</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QPushButton" name="btnChooseFile">
<property name="geometry">
<rect>
<x>10</x>
<y>10</y>
<width>93</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string>Choose file</string>
</property>
</widget>
<widget class="QLabel" name="lblFile">
<property name="geometry">
<rect>
<x>30</x>
<y>70</y>
<width>321</width>
<height>16</height>
</rect>
</property>
<property name="text">
<string><html><head/><body><p><span style=" font-weight:600;">File:</span></p></body></html></string>
</property>
</widget>
<widget class="QLabel" name="lblFilePath">
<property name="geometry">
<rect>
<x>30</x>
<y>100</y>
<width>321</width>
<height>16</height>
</rect>
</property>
<property name="text">
<string><html><head/><body><p><span style=" font-style:italic;">FilePath</span></p></body></html></string>
</property>
</widget>
<widget class="QPushButton" name="btnChooseFile_2">
<property name="geometry">
<rect>
<x>140</x>
<y>10</y>
<width>93</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string>Choose files</string>
</property>
</widget>
<widget class="QPushButton" name="btnChooseFile_3">
<property name="geometry">
<rect>
<x>260</x>
<y>10</y>
<width>93</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string>Save file</string>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>380</width>
<height>21</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
【讨论】：
非常感谢！这完美地工作并且还解决了我在将完整路径添加到“FilePath”标签时遇到的问题【参考方案2】：如果你需要一个标准的文件对话框，你不必在设计器中设计它或制作一个单独的类。
你要做的就是
在 Main 中导入 QFileDialog
编写一个可以打开标准文件对话框的函数：
def open_file_dialog(self):
# Just this line will open a standard file dialog for you
res = QFileDialog.getOpenFileName(QFileDialog(self), # parent
"Select file", # Dialog title
"/some/path/to/open/by/default",
"JPEG Image (*.jpeg)") # filter
# Once you reach here - dialog will be closed
if res == ('', ''):
print("Cancelled")
else:
self.process_result(res)
-
将按钮点击事件与上面的函数联系起来，就像你做的那样。
【讨论】：
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