How to enable textbox on checkbox.checked on C#?

Question

I'm new to C#. The textbox1 is locked by default and I want to enable it the moment I check the checkbox1. I use the following code, but it doesn't work:

private void checkboxevent(object sender, EventArgs e)
{
    if (checkBox1.Checked = true)
        textBox1.Enabled = true;
    else
        textBox1.Enabled = false;
}

Winforms. checkBox1.Checked = textBox1.Enabled doesn't work too. — user3023137
– user3023137, Commented Jan 8, 2014 at 14:06

dandan78 · Accepted Answer · 2014-01-08 13:34:56Z

10

= is the assignment operator == is the equality operator

Take a close look at the following statement

if (checkBox1.Checked = true)

answered Jan 8, 2014 at 13:34

dandan78

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4 Comments

dandan78 Over a year ago

Are you sure the event handler is getting called?

user3023137 Over a year ago

Probably not. When I put this code under a buttonclick, works fine. But I need to make it work at the moment the checkbox is unchecked.

dandan78 Over a year ago

Have you tried adding the eventhandler to the CheckStateChanged event of your checkbox?

dandan78 Over a year ago

No problem. Feel free to click the checkmark to indicate that this is the answer to your question.

Ted · Accepted Answer · 2014-01-08 13:33:44Z

0

add autopostaback="true" for your checkbox in order to refresh the page whenever the checkbox is checked or unchecked

I'm assuming that you're talking about webforms.

Also = true is incorrect. It should be == true

Also, == true is altogether redundant. if (checkbox.Checked) is all you need.

answered Jan 8, 2014 at 13:33

Ted

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3 Comments

Abbas Over a year ago

Could be WinForms, and they don't have AutoPostBack. :)

Mikey Mouse Over a year ago

Yeah, and if it's Webforms, do you really wanna post back just to enable a text box. Better to use some jQuery

Ted Over a year ago

Agreed, but I am attempting to answer the question rather than propose a different approach.

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