Enabling textbox2 as data is entered in textbox1

nishant ranjan

15y2.3k.NET

how to enable 2nd textbox as i enter data in first textbox.

i have two textbox txt1 and txt2. txt2 enable="false".
i want that as i enter any character in txt1 (focus still on txt1) txt2 enabled property should become false.

i am able to do this when i set my focus out of txt1. but nt able to do this as i enter the first input in the txt1.

11 Replies

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Zoran Horvat15y ago
Accepted answer
Then add onKeyPress event handler as well:

Zoran
0
nishant ranjan15y ago
thanks
0
nishant ranjan15y ago
ya... its working now....
0
nishant ranjan15y ago
ya that i have changed (true and false) but the actual thing that withouct clicking outside txt1 the txt2 enabled should be true as soon as i enter 1st character
0
Zoran Horvat15y ago
Then it is only the opposite logic:

function DisableTxt2(txt1Text)
{
        var txt2 = document.getElementById("txt2");
        if (txt1Text.length == 0)
                txt2.disabled = true;
        else
                txt2.disabled = false;
}

Zoran
0
nishant ranjan15y ago
this is working only when i am setting focus out of txt1.... what i want is "suppose i want to write nishant. and i enter n at that point itself txt2 enabled should be true. and i continue writing rest character. and when i delete all character with focus still on txt1 itself...i.e. as soon as txt1 becomes empty then txt2 enabled property should be false
0
Zoran Horvat15y ago
Then use JavaScript to enable/disable txt2 on client:

function DisableTxt2(txt1Text)
{
        var txt2 = document.getElementById("txt2");
        if (txt1Text.length == 0)
                txt2.disabled = false;
        else
                txt2.disabled = true;
}

Then in the txt1 element definition:

Zoran
0
nishant ranjan15y ago
nothing happens when i enter first character, and even when i set focus out of txt1 then also its nt enabled
0
nishant ranjan15y ago
its web application and its not working. protected void txt1_TextChanged(object sender, EventArgs e) { txt2.Enabled = string.IsNullOrEmpty(txt1.Text); } this is what i hav done
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Vulpes15y ago
If it's a Windows Forms application, try the following:

private void txt1_TextChanged(object sender, EventArgs e)
{
int len = txt1.Text.Length;
if (len == 0)
txt2.Enabled = true; // re-enable if all characters are subsequently deleted
else if (len == 1)
txt2.Enabled = false; // disable when first character entered
}
0
Zoran Horvat15y ago
In txt1 textbox's TextChanged event write this:
void txt1_TextChanged(object sender, EventArgs e)
{
txt2.Enabled = string.IsNullOrEmpty(txt1.Text);
}

This whill act upon every character entered in txt1. Whenever txt1 contains any non-empty text, txt2 will be disabled. As soon as you delete the last chracter from txt1, txt2 will become enabled.

Zoran
0