How to make a button to be disabled after it has been clicked once in C# windows form

Question

0.00/5 (No votes)

See more:

Good day Please i created a cbt application and have a start and a submit button.Whenever the start button is clicked it will take the user to the exam area then when the submit button is clicked the user get there result but i want the start button to be disabled permanently after the submit button has been clicked i dont want the same user to do the exam twice.Where Student dashboard is where the start button is.

What I have tried:

  public void submit_Click(object sender, EventArgs e)
        {
 StudentDashBoard db = new StudentDashBoard();
db.btnstart.Enabled = false;

Posted 18-Oct-17 11:27am

akinwunmi

Updated 18-Oct-17 23:41pm

Add a Solution

Comments

Karthik_Mahalingam 18-Oct-17 23:43pm

is both the button in same form?

akinwunmi 19-Oct-17 18:41pm

No different form

Karthik_Mahalingam 19-Oct-17 21:12pm

Is both the form opened at same time ?

Ralf Meier 19-Oct-17 2:16am

I suppose that you mean this even if the application is (re-)startet again ...?

akinwunmi 19-Oct-17 18:29pm

yes thanks

Ralf Meier 20-Oct-17 1:04am

Then you should store this information, according to the user, into a file.
When the application is startet you should 1st look if you have any saved data. When the user log's into the application you look inside your stored data and set the Enabled-property accordingly.

1 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)

phil.o · Answer 1 · 2017-10-18T23:41:00

Solution 2

It seems that, on button click, you create a new instance of the form.
You don't have to (and should not).
Since when the event hanler is executed, the form is already instantiated, you just need to access the btntart instance in it:

C#

public void submit_Click(object sender, EventArgs e)
{
   btnstart.Enabled = false;
   // ...
}

Hope this helps. Kindly.

Posted 18-Oct-17 23:41pm

phil.o

Comments

CPallini 19-Oct-17 5:58am

5.

phil.o 19-Oct-17 6:26am

Thanks :)

akinwunmi 19-Oct-17 18:57pm

public void submit_Click(object sender, EventArgs e)
{
btnstart.Enabled = false;
// ...
}
this is not working i have tried if several times what i want is that the user will not be allowed to click the start button again if the user click on the submit button

phil.o 19-Oct-17 20:13pm

If you want the start button to be disabled permanently (even if the application is restarted), then you will have to persist this state externally; either on the local filesystem, or on a server. But then, you will need a login system, unless your application is made for only one user.
Your requirements are not very clear, could you clarify them?

akinwunmi 22-Oct-17 3:24am

the application is a cbt app where i can have multiple users.i dont want the user to take the exam twice so i have the start button when it time for the exam it will show then when the user click on it will take the user to the exam area once the user submit the question the start button should be disabled. so that that the user will not be able to take the exam twice.

akinwunmi 22-Oct-17 3:28am

before the user takes the exam,the user registration number will be required if the user has taken the exam it should show that the user cannot take the exam twice.is this one possible

phil.o 22-Oct-17 4:11am

Then you must have a list of users registration numbers somewhere. You have to serialize a list of registration numbers whose users already have passed the test. Since you cannot hardcode this list, you have to store it somewhere, either on local filesystem or on a server, and have this list loaded at program start.