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File selection dialog

Using wx.FileDialog to select files

wx.FileDialog provides a standard file selection window for wxPython applications. The user chooses a file from the dialog, confirms the selection, and the program can then retrieve the selected file's path.

A basic instance can be created like this:

dlg = wx.FileDialog(parent, message=None, defaultDir=None, defaultFile=None, wildcard=None, style=None, pos=None, size=None, name=None)
dlg.GetPath()#返回文件地址字符串

The constructor accepts options such as the parent window, prompt text, initial directory, default filename, file filters, and dialog style. In the example below, wx.FD_OPEN configures the dialog for opening an existing file. Like other wxPython dialogs, it can be displayed modally with ShowModal(). When the user confirms the selection, GetPath() returns the complete file path.

The sample application places a button beside a text field. Clicking the button opens the file picker. After a file is selected, its path is written to the first text field, while a second field displays several pieces of file information: size, access time, creation time, and modification time.

import wx
import os
import time

class MyFrame(wx.Frame):
    def __init__(self, *args, **kwds):

        kwds["style"] = kwds.get("style", 0) | wx.DEFAULT_FRAME_STYLE
        wx.Frame.__init__(self, *args, **kwds)
        self.SetSize((400, 300))
        self.text_ctrl_1 = wx.TextCtrl(self, wx.ID_ANY, "")
        self.button_1 = wx.Button(self, wx.ID_ANY, u"选择文件")
        self.text_ctrl_2 = wx.TextCtrl(self, wx.ID_ANY, "")

        self.__set_properties()
        self.__do_layout()


    def __set_properties(self):

        self.SetTitle("frame")
        self.button_1.Bind(wx.EVT_BUTTON,self.onButton_1)

    def __do_layout(self):

        sizer_1 = wx.BoxSizer(wx.VERTICAL)
        sizer_3 = wx.BoxSizer(wx.HORIZONTAL)
        sizer_2 = wx.BoxSizer(wx.HORIZONTAL)
        sizer_2.Add(self.text_ctrl_1, 1, wx.ALL, 0)
        sizer_2.Add(self.button_1, 0, 0, 0)
        sizer_1.Add(sizer_2, 0, wx.ALL | wx.EXPAND, 0)
        sizer_3.Add(self.text_ctrl_2, 1, wx.ALL | wx.EXPAND, 0)
        sizer_1.Add(sizer_3, 1, wx.ALL | wx.EXPAND, 0)
        self.SetSizer(sizer_1)
        self.Layout()

    def onButton_1(self,e):
        print("按钮事件")
        dlg = wx.FileDialog(self, message="选择一个文件", defaultDir=os.getcwd(), style=wx.FD_OPEN)
        ret = dlg.ShowModal()
        if ret == wx.ID_OK:
            print(dlg.GetPath())  # 文件地址
            self.text_ctrl_1.SetValue(dlg.GetPath())

            fp = os.path.join(dlg.GetPath())  # 组装文件地址
            ###输出到弹出信息窗口的字符拼装。
            retstr = str(self.get_FileSize(fp)) + "\n" + self.get_FileAccessTime(fp) + "\n" + self.get_FileCreateTime(
                fp) + "\n" + self.get_FileModifyTime(fp)
            self.text_ctrl_2.SetValue(retstr)

        dlg.Destroy()


    # 把时间戳转化为时间: 1479264792 to 2016-11-16 10:53:12
    def TimeStampToTime(self, timestamp):
        timeStruct = time.localtime(timestamp)
        return time.strftime('%Y-%m-%d %H:%M:%S', timeStruct)

    # 获取文件的大小,结果保留两位小数，单位为MB
    def get_FileSize(self, filePath):
        fsize = os.path.getsize(filePath)
        return fsize

    # 获取文件的访问时间
    def get_FileAccessTime(self, filePath):
        t = os.path.getatime(filePath)
        return self.TimeStampToTime(t)

    # 获取文件的创建时间
    def get_FileCreateTime(self, ilePath):
        t = os.path.getctime(ilePath)
        return self.TimeStampToTime(t)

    # 获取文件的修改时间
    def get_FileModifyTime(self, filePath):
        t = os.path.getmtime(filePath)
        return self.TimeStampToTime(t)
class MyApp(wx.App):
    def OnInit(self):
        self.frame = MyFrame(None, wx.ID_ANY, "")
        self.SetTopWindow(self.frame)
        self.frame.Show()
        return True


if __name__ == "__main__":
    app = MyApp(0)
    app.MainLoop()

The file-related helper methods use functions from Python's os.path module. getsize() obtains the file size, while getatime(), getctime(), and getmtime() return the access, creation, and modification timestamps. TimeStampToTime() converts each timestamp into a readable YYYY-MM-DD HH:MM:SS string before the values are combined and placed in the lower text control.

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