C# one button to have 2 functions?

Question

0.00/5 (No votes)

See more:

Hi,

I'm trying to make one button have two functions for my C# project, press it once to open a form and then press it again to close that same for that opened, how can I do this please? I can show you the code I had done so far, it's nothing special.

The button opens my setting form that has setting such as turn music on and off, and other functions for the user.

What I have tried:

//Code below opens the game settings menu.
private void SettingsBTN_Click(object sender, EventArgs e)
{
Kid_Merchant_Hero.GameSettings f = new Kid_Merchant_Hero.GameSettings();
f.Show();
}

Posted 20-Apr-19 1:04am

Member 14176556

Updated 20-Apr-19 4:37am

Add a Solution

3 solutions

Solution 3

You can enumerate all the Windows / forms you've created (WPF and Windows.Form apps). You can then decide to show, hide, discard any of them; or create extras without maintain a separate collection.

How to: Get all Windows in an Application | Microsoft Docs[^]

Posted 20-Apr-19 4:38am

Gerry Schmitz

Comments

Member 14176556 20-Apr-19 11:02am

thanks for your solution.

Solution 1

I am not sure, what data your GameSettings object holds, you need to provide more details, but is there a flag that can represents if your form is open, if yes then do something like below:

if(!f.IsOpen)
f.Show();
else
f.Close();

else, you can create 2 event handlers, one having open and other having close form logic, and in each of these, detach current event and and attach other event on button click.
Provide more details, if none of these work for you

Posted 20-Apr-19 1:23am

AnkushK1

Comments

Member 14176556 20-Apr-19 11:02am

thanks for your solution.

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2019-04-20T02:15:00

The first problem is that you are storing the new form instance in a local variable, which will be discarded when you exit the handler method.
Start by moving it to class level:

C#

private Kid_Merchant_Hero.GameSettings gameSettings = null;

Then you can use that to decide what to do:

C#

private void SettingsBTN_Click(object sender, EventArgs e)
{
if (gameSettings == null)
   {
   gameSettings = new Kid_Merchant_Hero.GameSettings();
   gameSettings.FormClosed += gameSettings.FormClosed;
   gameSettings.Show();
   SettingsBTN.Text = "Close";
   }
else
   {
   gameSettings.Close();
   }
}

Handle the FormClosed event to clear the form:

C#

private void gameSettings_FormClosed(object sender, FormClosedEventArgs e)
    {
    gameSettings = null;
    SettingsBTN.Text = "Open";
    }

And you're done.