Visual Basic - How to restart my program so the User doesn't have to do it manually?

Question

Private Sub btnCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalc.Click
If txtUserLength.Text = "" And txtUserWidth.Text = "" Then
MsgBox("Please enter both Width and Length")
Call Clear()
ElseIf txtUserLength.Text = "" Then
MsgBox("Please enter a Length")
Call Clear()
ElseIf txtUserWidth.Text = "" Then
MsgBox("Please enter a Width")
Call Clear()
End If

Once a message box has been closed, the program continues and then there are problems (as the text box was empty) and the program stops. Obviously I have the If statements so that the user has to enter values into the text boxes. How can I make the program (or the code for the button) restart so that the user can have another chance to enter values without having to manually restart the program?

Thanks.

Answer 1

You don't need to restart your application, you can just add a Return statement if your conditions are not met. For example:



Call Clear()

Return



But to answer your question, in order to restart an application use:

Application.Restart()

Answer 2

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Answer 3

To correct your problem :



check those values before using them, and if they're empty or not what you expect, re-prompt the user.



To answer your question:

Again: this is not the solution, it is the answer to your question!



Put your code from the btnCalc.Click in a try / catch (don't know the syntax in vb.net, only C#).

Then in the catch insert:



// This will launch a new instance of your application.

System.Diagnostics.Process.Start("name of your application.exe");

// This will close the current app

Application.Exit();

Answer 4

Application.exit() works, as does Application.end()

Problem is it causes visual studio to lock .exe and /or .pdb files in the bin folder.

I have created a junk folder and drag offending files into the junk folder.

If Application.xx is not call, it does not seem to be a problem.

Application.exit... a problem.

Just plain end works

Answer 5

Application.restart