using checkbox to enable textbox

Question

i have an application here in winforms that am trying to make. This is how i want it to happen: whenever the user clicks on register visitor button the registration form should be opening. works fine. here is the function that is called in that case:

private void Register_Visitor_Load(object sender, EventArgs e)

On this form i have a textfield placed which i want to disable when the form loads. i wrote a line which disables the textbox on form load:

textbox1.enabled = false;

i placed the above line in the load function which is working fine. now i want to enable my textbox1 based on the checkbox checked. for this i wrote the code:

CheckState state = checkBox1.CheckState;
            switch (state)
            {
                case CheckState.Checked:
                    {
                        textBox1.Enabled = true;
                        break;
                    }
                case CheckState.Indeterminate:
                case CheckState.Unchecked:
                    {
                        break;
                    }

now when i place the code above in the page load function nothing happens which is surely going to happen as that function is only called on form load. what am not getting is where to place the checkbox code so that my textbox is enable on runtime. other function are in response to button but what i want here it to instantly enable the textfield on runtime when the user checks the checkbox. kindly explain me how am i going to accomplish this!

try doing the code in the check changed event of check box.

Abin
– Abin

2013-12-12 06:43:08 +00:00
Commented Dec 12, 2013 at 6:43 — Abin
– Abin, Commented Dec 12, 2013 at 6:43
make checked event of the checkbox.

A.K.
– A.K.

2013-12-12 06:43:59 +00:00
Commented Dec 12, 2013 at 6:43 — A.K.
– A.K., Commented Dec 12, 2013 at 6:43

Dmitrii Bychenko · Accepted Answer · 2016-08-09 10:46:31Z

10

You can use CheckStateChanged event; so whatever reason the checkBox1 is checked/unchecked/grayed you'll have the textBox1 properly enabled/disabled

private void checkBox1_CheckStateChanged(object sender, EventArgs e) {
  textBox1.Enabled = (checkBox1.CheckState == CheckState.Checked);
}

edited Aug 9, 2016 at 10:46

answered Dec 12, 2013 at 6:45

Dmitrii Bychenko

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2 Comments

Somachr Over a year ago

Isn´t textBox1.Enabled = checkBox1.Checked; even better?

Dmitrii Bychenko Over a year ago

@Somachr: it will be if you don't have to deal with grayed states; since CheckState.Indeterminate has been mentioned in the question, I think it'll be safer to declare the state expilitly.

C Sharper · Accepted Answer · 2013-12-12 06:42:54Z

1

you are placing code at wrong event.

Instead of placing in pageload place that code on chekchange event of checkbox.

That will help you.

private void chkDisable_CheckedChanged(object sender, EventArgs e)
{
        if (((CheckBox)sender).Checked)
        {
            textBox1.Enable=true;
        }
        else
        {
            textBox1.Enable=false;
        }
}

answered Dec 12, 2013 at 6:42

C Sharper

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1 Comment

Zoraiz Hammad Over a year ago

it works for me, thanks @C Sharper

TutuGeorge · Accepted Answer · 2013-12-12 06:46:42Z

0

Place the above code inside the function which handles the event for check box. In your case it is checkchanged status.

answered Dec 12, 2013 at 6:46

TutuGeorge

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Comments

r.mirzojonov · Accepted Answer · 2013-12-12 07:32:44Z

0

You can try this:

 private void checkBox1_Click(object sender, EventArgs e)
 {

        if (checkBox1.Checked)
        {
            textBox1.Enabled = false;
        }
        else
        {
            textBox1.Enabled = true;
        }
 }

answered Dec 12, 2013 at 7:32

r.mirzojonov

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Comments

Jar · Accepted Answer · 2017-11-21 19:29:04Z

0

I did a hybrid of some of the above answers and it worked perfectly. I wanted the state of a button to be disabled upon loading the form, but then enabled if the user checks a box, here's the code:

private void checkBox1_CheckedChanged(object sender, EventArgs e)
    {
       button1.Enabled = (checkBox1.CheckState == CheckState.Checked);
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        if (checkBox1.Checked)
        {
            button1.Enabled = true;
        }
        else
        {
            button1.Enabled = false;
        }


    }

answered Nov 21, 2017 at 19:29

Jar

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