Python CLR Winforms – Passing data between .NET Winforms
Question:
I have a fairly simple task that has eluded me when using Python to generate and automate .NET WinForms. How do I pass data between forms?
I’ve tried everything: using global variables, using immutable strings, etc. and nothing seems to stick. Can someone show me an example, send me a link, or let me know what I am doing wrong? I have been at this for over a week and frustration is starting to mount.
Below is a (sloppy) example of taking data from one form – a string – and sending it to another form in a Textbox.
MYSTRING = ''
import clr
clr.AddReference("System.Windows.Forms")
clr.AddReference("System.Drawing")
from System.Windows.Forms import *
from System.Drawing import *
class MyForm(Form):
def __init__(self):
self.Text1 = TextBox()
self.Button1 = Button()
self.Button1.Location = Point(0, self.Text1.Bottom + 10)
self.Button1.Text = 'Send'
self.Controls.Add(self.Text1)
self.Controls.Add(self.Button1)
self.Button1.Click += self.Button1_Click
def Button1_Click(self, sender, args):
MYSTRING = self.Text1.Text
self.TopLevel = False
f2 = MyForm2()
f2.Show()
self.TopLevel = True
class MyForm2(Form):
def __init__(self):
self.Text2 = TextBox()
self.Controls.Add(self.Text2)
self.Load += self.MyForm2_Load
def MyForm2_Load(self, sender, args):
self.Text2.Text = MYSTRING
Application.EnableVisualStyles()
Application.SetCompatibleTextRenderingDefault(False)
Application.Run(MyForm())
Answers:
So, I figured it out…again.
I had to set a python global variable within one of my events that triggers an event, like so…
def dgvExpanderInfo_CellDoubleClick_Event(self, sender, args):
global SelectedExpanderData_List
...
…then I could access whatever is in that globabl variable – in this case it was a list.
def MyForm2_Form_Load_Event(self, sender, args):
self.textbox1.Text = SelectedExpanderData_List[0]
self.textbox2.Text = SelectedExpanderData_List[1]
self.textbox3.Text = SelectedExpanderData_List[2]
...
I hope this helps others as I have found no real documentation on this anywhere.
I have a fairly simple task that has eluded me when using Python to generate and automate .NET WinForms. How do I pass data between forms?
I’ve tried everything: using global variables, using immutable strings, etc. and nothing seems to stick. Can someone show me an example, send me a link, or let me know what I am doing wrong? I have been at this for over a week and frustration is starting to mount.
Below is a (sloppy) example of taking data from one form – a string – and sending it to another form in a Textbox.
MYSTRING = ''
import clr
clr.AddReference("System.Windows.Forms")
clr.AddReference("System.Drawing")
from System.Windows.Forms import *
from System.Drawing import *
class MyForm(Form):
def __init__(self):
self.Text1 = TextBox()
self.Button1 = Button()
self.Button1.Location = Point(0, self.Text1.Bottom + 10)
self.Button1.Text = 'Send'
self.Controls.Add(self.Text1)
self.Controls.Add(self.Button1)
self.Button1.Click += self.Button1_Click
def Button1_Click(self, sender, args):
MYSTRING = self.Text1.Text
self.TopLevel = False
f2 = MyForm2()
f2.Show()
self.TopLevel = True
class MyForm2(Form):
def __init__(self):
self.Text2 = TextBox()
self.Controls.Add(self.Text2)
self.Load += self.MyForm2_Load
def MyForm2_Load(self, sender, args):
self.Text2.Text = MYSTRING
Application.EnableVisualStyles()
Application.SetCompatibleTextRenderingDefault(False)
Application.Run(MyForm())
So, I figured it out…again.
I had to set a python global variable within one of my events that triggers an event, like so…
def dgvExpanderInfo_CellDoubleClick_Event(self, sender, args):
global SelectedExpanderData_List
...
…then I could access whatever is in that globabl variable – in this case it was a list.
def MyForm2_Form_Load_Event(self, sender, args):
self.textbox1.Text = SelectedExpanderData_List[0]
self.textbox2.Text = SelectedExpanderData_List[1]
self.textbox3.Text = SelectedExpanderData_List[2]
...
I hope this helps others as I have found no real documentation on this anywhere.