How to run an external script using visual basic? - vb.net

Question

I want to make a Windows application using visual basic and visual studio 2017.
Here I want to run an external Python script which will run when 'Button 1' is pressed in the windows form. It will take input from the Textbox in the form and do some calculations and then return the result and put it back in the Textbox in the form.
The python code can be either this :
r = input()
p = 2*3.14*r
print(p) #Instead of print(p) something that can return the value to the form
OR This:
def peri(r):
p = 2*3.14*r
return p

Answer 1

I managed to find this solution for you and i really hope it works:
1.Write your python code , for example : print("Hello world python !!") in text file and save to .py
2.Create project at VB.NET, drag component 1 button and 1 textbox into form.
3.Double click button1, at event click button1 write this code
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim proc As Process = New Process
proc.StartInfo.FileName = "C:\Python34\python.exe" 'Default Python Installation
proc.StartInfo.Arguments = pathmypythonfile.py
proc.StartInfo.UseShellExecute = False 'required for redirect.
proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden 'don't show commandprompt.
proc.StartInfo.CreateNoWindow = True
proc.StartInfo.RedirectStandardOutput = True 'captures output from commandprompt.
proc.Start()
AddHandler proc.OutputDataReceived, AddressOf proccess_OutputDataReceived
proc.BeginOutputReadLine()
proc.WaitForExit()
TextBox1.Text = Value
End Sub
Public sub proccess_OutputDataReceived(ByVal sender As Object, ByVal e As DataReceivedEventArgs)
On Error Resume Next
If e.Data = "" Then
Else
Value = e.Data
End If
End sub
4. Create module file, and write this variable global :
Module module
Public Value As String
End Module
5. Running the application, if textbox1 have populated with some string then your code was success.
HERE is a lick with the full process.

Answer 2

This is the answer by #Dimitar_Georgiev, with small corrections and formatting fixes.
I managed to find this solution for you and i really hope it works:
Write your python code , for example : print("Hello world python !!") in text file and save to .py
Create project at VB.NET, drag component 1 button and 1 textbox into form.
Double click button1, at event click button1 write this code
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim proc As Process = New Process
proc.StartInfo.FileName = "C:\Python34\python.exe" 'Default Python Installation
proc.StartInfo.Arguments = "C:\path\to\my\pythonfile.py"
proc.StartInfo.UseShellExecute = False 'required for redirect.
proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden 'don't show commandprompt.
proc.StartInfo.CreateNoWindow = True
proc.StartInfo.RedirectStandardOutput = True 'captures output from commandprompt.
proc.Start()
AddHandler proc.OutputDataReceived, AddressOf proccess_OutputDataReceived
proc.BeginOutputReadLine()
proc.WaitForExit()
TextBox1.Text = Value
End Sub
Public sub proccess_OutputDataReceived(ByVal sender As Object, ByVal e As DataReceivedEventArgs)
On Error Resume Next
If e.Data = "" Then
Else
Value = e.Data
End If
End sub
Create module file, and write this variable global :
Module module
Public Value As String
End Module
Running the application, if textbox1 have populated with some string then your code was success.
HERE is a lick with the full process.